5099 results about "Diamond" patented technology

The invention relates to a curved surface processing path generation method and system for an ultra-precise diamond lathe, and the method mainly comprises the steps: obtaining the three-dimensional point cloud data of a to-be-processed curved surface through a three-dimensional scanning device, carrying out the global curvature calculation, and dividing the curved surface into a plurality of sub-regions to generate an initial processing path; and then, the initial path is optimized, interference and errors are reduced, and finally a target machining path subjected to comprehensive verification is obtained. The path is guided into a lathe to execute machining, and high-precision curved surface machining is achieved. By means of the method, the machining precision and the surface quality are improved, and it is ensured that higher smoothness and shape precision are achieved in ultra-precision machining.

The invention discloses a method for improving the heat dissipation performance of an AlGaInP red light Micro LED chip. The method comprises the following steps: S1, preparing an epitaxial structure: processing a substrate and a buffer layer, growing an etching barrier layer and an ohmic contact layer, and carrying out stacking epitaxy on a functional layer; s2, patterning the silicon-based substrate: preparing a dielectric layer and a metal structure; s3, diamond ohmic contact layer integration: processing a p-type conductive diamond film layer, and carrying out metal reflection and bonding; s4, removing the substrate and forming an n-type structure: stripping the substrate to be in n-type contact; s5, back-end process integration: preparing an electrode and an optical structure; according to the invention, the heat dissipation performance of the chip is significantly improved; the series resistance is reduced by 30%-50%; the resistivity of the p / n type diamond ohmic contact layer is reduced by 1-2 orders of magnitude compared with ITO; gaAs material light absorption and metal shading are avoided, and the red light transmittance is improved from 75% to more than 90% by combining with the micro lens array; the method is compatible with existing MOCVD, CVD and photoetching processes, large-scale production of wafers of 2-12 inches can be achieved, and the manufacturing cost is reduced.

The invention relates to microwave-free sensor technology with NV centers in diamond. In contrast to the prior art, the intensity of the pump radiation is not PWM-modulated, but monofrequency and sinusoidally modulated. Further measures, such as the use of semiconductor-based pump radiation sources and operation with an offset, prevent the formation of harmonics in the temporal intensity profile of the pump radiation irradiating the NV centers in the sensor element. This allows the sensor system to use the phase shift to determine measured values ​​of external physical parameters such as magnetic flux density, acceleration, temperature, etc., within a recognized and disclosed frequency range of the intensity modulation of the pump radiation, thereby minimizing the influence of noise from the pump radiation source. The galvanic isolation does not need to be compromised by cables from additional sensors.

The invention discloses a gradually-changed Si-Al alloy coating diamond / aluminum-based composite material and a preparation method and application thereof, and the gradually-changed Si-Al alloy coating diamond / aluminum-based composite material is composed of an aluminum matrix and modified diamond evenly dispersed in the aluminum matrix. The modified diamond comprises diamond particles and a gradually-changed Si-Al alloy coating wrapping the surfaces of the diamond particles, in the gradually-changed Si-Al alloy coating, the mass fraction of Si is linearly decreased from 100% to 0% from inside to outside, and the mass fraction of Al is linearly increased from 0% to 100% from 0%. According to the method, the Si-Al alloy coating with gradually-changed and controllable components is constructed on the surface of the diamond, so that a SiC transition layer with strong binding force can be formed with the diamond, the gradient gradient coating is formed from inside to outside, internal stress can be released, good metallurgical bonding with an aluminum matrix can be achieved, formation of an Al4C3 phase is inhibited, and therefore the performance of the composite material is remarkably improved.

The invention discloses a simulation method for abrasive particle vibration machining based on reaction molecular dynamics, and relates to the technical field of reaction molecular dynamics, a vibration auxiliary model of a Si surface of 4H-SiC is established, the process of vibration auxiliary chemical mechanical polishing of diamond abrasive particles in the Z-axis direction is simulated, the Si surface model of the 4H-SiC is consistent with an actual machining surface of silicon carbide, and the abrasive particle vibration machining simulation method is suitable for the actual machining surface of silicon carbide. The vibration direction of the vibration auxiliary simulation is consistent with the motion direction of the abrasive particles in the actual chemical mechanical polishing process, so that the acting force and motion trail simulation of the diamond abrasive particle model in the polishing process are more real, and the simulation process is closer to the actual machining process; the atom removal mechanism of the Si surface of 4H-SiC under the conditions of different vibration amplitudes and frequencies and different scratching depths can be researched, so that a chemical mechanical polishing technology is conveniently optimized by ultrasonic vibration, and the polishing quality of silicon carbide is further improved; the technical problem that an existing vibration auxiliary model based on reaction molecular dynamics simulation cannot effectively optimize the chemical mechanical polishing process of silicon carbide is solved.

The invention relates to the technical field of diamond precision machining, and provides a polishing solution for diamond and a diamond chemical mechanical polishing method. The polishing solution for the diamond is formed by mixing and uniformly stirring deionized water, diamond micro-powder, iron powder, a catalyst and a dispersing agent; the grinding aid comprises the following components in percentage by weight: 50%-68% of deionized water, 10%-40% of diamond micro powder, 10%-35% of iron powder, 2%-5% of a catalyst and 0.1%-0.5% of a dispersing agent. By adding the iron powder into the polishing solution, the iron powder can reduce the activation energy of diamond graphitization and catalyze the diamond surface, and the catalytic action aggravates the conversion from diamond to graphite, so that the diamond surface becomes very soft, and carbon atoms on the diamond surface are easier to separate. And the polishing and removing process of the diamond material is accelerated through the catalysis effect of the iron powder, so that ideal surface quality and precision can be achieved in a short time during diamond polishing.

The utility model discloses a substrate table for preparing monocrystal diamond by microwave plasma, which relates to the technical field of monocrystal diamond preparation and comprises a first molybdenum plate and a first molybdenum ring, the first molybdenum plate is used for bearing seed crystal, and a first groove is arranged on the bottom surface of the first molybdenum ring. The inner side wall of the first groove can be tightly attached to the outer side wall of the first molybdenum sheet, and a first through hole is formed in the inner top surface of the first groove; according to the substrate table for preparing the monocrystal diamond through the microwave plasma, the utilization rate of plasma energy can be increased.

The invention provides a high-porosity ceramic bond diamond micro-powder grinding tool and a preparation method and application thereof. The preparation method comprises the following steps: preparing ceramic bond diamond micro-powder composite powder by adopting a sol-gel method; the preparation method comprises the following steps: preparing porous agglomerated diamond microspheres by taking ceramic bond diamond micro-powder composite powder and an organic pore-forming agent as raw materials and adopting an atomization granulation method; the preparation method comprises the following steps: taking sodium alginate and calcium salt as raw materials, and preparing a calcium alginate water ball solution by adopting a multiple emulsion method and an atomization granulation method; the porous agglomerated diamond microspheres and the calcium alginate water balls are used as main raw materials, and a gel casting method is adopted for preparing the ceramic bond diamond micro-powder grinding tool. According to the diamond micro-powder grinding tool, the organic pore forming agent and the sodium alginate water balls are used as the pore forming agents, so that the particle size and proportion of pores in the prepared diamond micro-powder grinding tool can be accurately controlled, and the diamond micro-powder grinding tool has the characteristics of high porosity, good self-sharpening performance, low grinding resistance and the like and can be used for efficient and high-quality machining of semiconductor materials.

The invention discloses a high-performance diamond cutter wear detection device and method, and relates to the technical field of wear detection, and the device comprises a structural characteristic obtaining module which obtains cutter structural characteristics; the cutting working condition characteristic acquisition module is used for acquiring cutting working condition characteristics of the cutter; the wear risk assessment module is used for carrying out wear risk assessment; the maintenance period optimization module is used for receiving the real-time cutting working condition and adaptively optimizing the tool maintenance period and the detection index priority; and the optimization module is adjusted, and the real-time cutting parameters are optimized. The technical problems that the detection frequency cannot be dynamically optimized according to different cutting working conditions, the timeliness and accuracy of wear detection are insufficient, and the service life of the tool is influenced in the existing tool wear detection are solved, and the purposes of dynamically adjusting the detection period and the index priority according to the change of the cutting working conditions, improving the timeliness and accuracy of wear detection and improving the working efficiency are achieved. The service life of the cutter is prolonged, and the technical effect of online nondestructive flaw detection of the high-performance diamond cutter is achieved.

The invention belongs to the technical field of grinding tools, and relates to a grinding pad for CVD diamond rough polishing and a preparation method thereof.The grinding pad comprises a substrate and grinding blocks which are arranged on the substrate and provided with flat top faces, and the ratio of the diameter or the side length of each grinding block to the gap distance of the adjacent grinding blocks is (10-15): (1-1.5); the top of the grinding block is chamfered; the grinding block is prepared from the following raw materials: a diamond-silicon carbide grinding material, a binder, glass fibers and a filler; the roundness of the diamond-silicon carbide grinding material is 0.80-0.85, and the D50 particle size of the diamond-silicon carbide grinding material is 40-60 microns; the grinding pad has high strength and modulus, good stability and high grinding and polishing efficiency. The grinding blocks of the grinding pad are densely distributed, the grinding part is large, the grinding blocks are provided with chamfers and gaps, the CVD diamond can be prevented from being scratched in the polishing process, and chippings can be removed; the grinding material in the grinding pad is high in strength, good in self-sharpening performance and good in holding force, and therefore it can be guaranteed that the grinding pad has high grinding capacity in the rough polishing process, and the machining effect is good.

The invention discloses a method for realizing high-quality stripping of large-size diamond by double-laser composite modification, which comprises the following steps: placing and fixing a sample on a three-dimensional mobile platform, and the upper surface of the sample is a crystal face (100); laser generated by an ultrafast laser generator penetrates through the upper surface of a sample and is focused into the sample, and then the laser generated by the ultrafast laser generator is used for performing first spot scanning on the sample to form an independent lattice structure; laser generated by the ultrafast laser generator is adopted to carry out secondary spot scanning on the sample to form a crack interconnected lattice structure; performing third-time line scanning on the sample by using laser generated by a nanosecond laser generator; and ultrasonically stripping the sample in water bath. By adopting a dual-laser composite modification process and combining bionic'honeycomb 'and'turtle shell' crack structure design, the crack is effectively guided to directionally extend along the crystal face (100), the problem of oblique crack when the stripping face is the crystal face (111) in the past is avoided, and the integrity and flatness of the stripping face are greatly improved.

A wear-resistant and low-friction coated piston ring and a preparation method therefor are provided. The OD surface diamond-like carbon coating consists sequentially of a first metal interlayer, a second metal interlayer, a gradient DLC layer, alternating high / low hardness DLC layers, and an outer running-in DLC layer. The side surface diamond-like carbon coating consists sequentially of a metal interlayer, a gradient DLC layer, and alternating high / low hardness DLC layers. The preparation method employs physical vapor deposition to sequentially deposit composite DLC coatings on the OD surface and side surface of the piston ring. The coating is a tetrahedral amorphous carbon structure, exhibiting good thickness uniformity and fine grain structure. This improves the wear resistance of the piston ring's OD surface and side surface, reduces the aggressiveness of the piston ring side surface against the piston ring groove, and meanwhile avoids adhesion.

The invention provides a special double-cavity row type airflow crushing system for producing diamond micro-powder, and effectively solves the problems that when an existing airflow crushing machine crushes diamond, the impact frequency of large particles is insufficient, small particles are excessively crushed, the particle size distribution range of the crushed micro-powder is wide, and the particle size of the produced diamond micro-powder is not uniform. According to the technical scheme, the device comprises two jet mills and a connecting structure, the jet mill comprises a crushing cavity, a feeding hole, a crushing nozzle, a pressure equalizing chamber and an air outlet; the crushing cavity is of a disc cavity structure consisting of a circular-ring-shaped side lining plate, an upper-end lining plate and a lower-end lining plate; spiral strips are arranged on the inner side walls of the side lining plates; the connecting structure comprises a cylindrical shell and a hollow pipe at the lower end of the cylindrical shell, and one end of the hollow pipe gradually faces downwards and communicates with the crushing cavity; a material guide plate is arranged on the lower end surface of the upper end lining plate; blanking pipes are arranged on the left and right sides of the lower end of the cylindrical shell; the lower ends of the blanking pipes are communicated with the crushing cavity; a filter screen is arranged at the upper end of the cylindrical shell.

The invention relates to the technical field of diamond epitaxial growth, and discloses an intelligent bias voltage regulation and control method and system for diamond single crystal heteroepitaxial growth, and the system comprises a data acquisition module, a prediction module, an intelligent optimization module, a gradient field compensation module and a feedback and regulation and control module. The future trend is pre-judged by adopting the prediction model, and potential growth abnormality such as nucleation probability reduction in a certain area can be perceived in advance, so that the control system has perspectiveness, and lagging of post passive compensation is avoided; the reinforcement learning controller comprehensively considers an accumulative effect and a long-term target in a strategy optimization process, so that bias voltage regulation and control are more intelligent; the intelligent decision-making capability is far better than that of an adjustment mode of artificial experience or a preset program, so that the growth process has stronger robustness on external disturbance such as airflow fluctuation and discharge state change; in the whole growth process, the consistency of crystal nucleuses and growth rates in all regions is kept, and the accumulation of thermal stress and defects in the large-size thin film can be inhibited.

The invention relates to the field of vacuum coating, in particular to a crystal hot-fix rhinestone vacuum coating device and a crystal hot-fix rhinestone vacuum coating process. The invention aims to solve the technical problem that the coating quality is reduced in the next coating process due to the fact that original coating materials are easy to accumulate and remain on the surface and in the heating container in the long-term high-temperature state and coating process of the heating container. In order to solve the technical problem, the vacuum coating device for the crystal ironed diamonds comprises a main box body, vacuum equipment is arranged at one end in the main box body, the vacuum equipment comprises a tank body, a plating material evaporation device is arranged in the tank body, the plating material evaporation device comprises a fixing column, the bottom of the fixing column is fixedly connected with the tank body, and the bottom of the fixing column is fixedly connected with the tank body. Threads are arranged outside the lower ends of the fixing columns. The evaporation disc can be replaced through the coating material evaporation device, and the replaced evaporation disc is cleaned, so that the phenomenon that the previous coating raw materials are easy to remain and accumulate around the evaporation disc in the long-term coating process is avoided.

The invention discloses a method and device for removing polyfluorinated perfluorides in a water body, and the method comprises the following steps: 1, pretreatment: removing large-particle impurities in the water body to be treated through a grid, then feeding the water body to be treated into a pH adjusting tank, and adding an acidic mixed solution to reduce the pH value to 4.0; 2, electrochemical oxidation: enabling the water body to flow into an electrochemical oxidation module, and reacting for 20-40 minutes under the voltage of 10V; when the method is implemented, long-chain PFAS is decomposed into short-chain products through three-stage cooperation of electrochemical oxidation, adsorption enrichment and membrane separation, so that subsequent removal of the short-chain PFAS is facilitated, the removal rate can be improved, the whole process is simpler compared with the prior art, and a large amount of cost is saved; the boron-doped diamond anode and the iron-cobalt bimetallic cathode are combined, and the modified biochar adsorbent is combined, so that the PFAS degradation rate is increased, and meanwhile, the electrode loss can be reduced.

The invention provides a diamond / copper multi-layer composite material capable of being subjected to high-temperature silver-copper welding, a preparation method of the diamond / copper multi-layer composite material and a heat dissipation device comprising the diamond / copper multi-layer composite material capable of being subjected to high-temperature silver-copper welding. The diamond / copper multilayer composite material capable of being subjected to high-temperature silver-copper welding is of a sandwich structure, a middle layer is made of a diamond / copper composite material, and an upper layer and a lower layer are respectively made of any one of tungsten copper, molybdenum copper and copper / molybdenum copper / copper (CPC material). The surface of the diamond / copper multilayer composite material is covered with the metal alloy material, so that the diamond / copper multilayer composite material has remarkably improved strength and lower thermal expansion coefficient at high temperature, and can be welded with ceramic at high temperature, so that a silver-copper solder can be used for replacing a gold-tin solder, and the application cost of the diamond / copper multilayer composite material is reduced.

The invention discloses a device and a method for chemically and mechanically polishing a diamond substrate under the assistance of double modified multi-energy fields. By means of energy application and ultrasonic cavitation of ultrasonic vibration to a polishing solution and dual modification of strong ultraviolet light to a polishing disc and a diamond substrate, on the premise that the surface quality of polished diamond is guaranteed, the removal rate of a diamond polishing material is increased by increasing the mechanical removal rate, and the surface quality of the polished diamond is guaranteed. The problem that the chemical mechanical polishing material removal rate of the diamond substrate is low is solved. In the machining process, a polishing solution circulating system keeps that a polishing solution infiltrates a diamond substrate, the surfaces of the diamond and a polishing disc are subjected to oxidation modification, and an oxidation layer on the surface of the diamond is removed under the coupling action of ultrasonic, photocatalytic oxidation, electrochemical corrosion and mechanical grinding and polishing removal. Double modification of the diamond substrate and the polishing disc is achieved, the oxidation rate and the mechanical removal rate of the diamond substrate are increased, and the material removal rate and the polishing quality are improved.

The invention belongs to the field of materials, and particularly relates to a composite thermal interface material and a preparation method thereof. The preparation method comprises the following steps: plating non-reactive metal, non-reactive metal carbide or non-reactive ceramic on the surface of diamond micro powder, inducing lattice defects on the surface of a plating layer and alloying a local interface by combining a mechanical force field, and defoaming to obtain the composite thermal interface material. The composite thermal interface material has high thermal conductivity and long-term stability, and the contradiction between excessive alloying of a traditional reactive coating and high interface thermal resistance of a non-reactive coating is solved. The method is particularly suitable for the field of thermal management of high-end electronic devices such as 5G chips and power modules.

The invention discloses a uniformly distributed saw blade and a preparation method thereof, and relates to the technical field of saw blades. The evenly-distributed saw blade comprises a base body and tool bits, a plurality of tool bits are annularly welded to the periphery of the base body, a plurality of diamonds are distributed on the tool bits through a net plate adsorption evenly-distributed technology, the tool bits are formed by sintering matrix powder, and the matrix powder comprises, by weight, 30%-40% of copper powder, 20%-30% of copper-tin diffusion powder, 10%-20% of carbonyl iron powder and 5%-10% of nickel powder. And 10%-15% of tin powder. According to the saw blade preparation process, a screen adsorption uniform distribution process and saw blade uniform distribution design are adopted, it is guaranteed that when the first diamond is consumed by 1 / 5-2 / 3, the second diamond can be exposed, it is guaranteed that edges are exposed when the diamonds are consumed to any height, and the cutting continuity of the diamonds is improved. The diamond of 60-100 meshes is used in the saw blade, a finer cutting face can be formed in the cutting process, and the saw blade is suitable for machining tasks with the high requirement for cutting precision. The 60-100-mesh diamond particles are suitable for cutting hard and brittle materials, and edge breakage and cracks of the materials can be reduced in the cutting process.

The invention relates to a chemical mechanical grinding system and method for a hard and brittle semiconductor wafer, and the chemical mechanical grinding method comprises the following steps: preparing an oil-based thermal activity-optical activity composite grinding fluid by adopting an organic thermal decomposition type oxidizing agent, an organic optical decomposition oxidizing agent, polyethylene glycol, glycerol and vegetable oil; building an ultraviolet light-diamond abrasive grinding wheel chemical mechanical grinding platform which has an ultraviolet light irradiation function and is adjustable and controllable in irradiation intensity and ultraviolet light wavelength; the chemical mechanical grinding platform and the minimal quantity lubrication liquid supply device are started, and the wafer to be machined and the diamond abrasive grinding wheel are controlled to rotate relative to each other for opposite grinding; turning on an ultraviolet light generator to accurately irradiate the thermal activity-optical activity composite grinding liquid drops on the surface of the wafer, inducing a thermal decomposition type oxidizing agent and an optical decomposition type oxidizing agent to generate active free radicals by utilizing grinding heat energy and ultraviolet light irradiation energy, and initiating a free radical oxidation reaction of a wafer surface layer material to form an oxidation layer with low interface bonding force; the oxide layer on the surface of the wafer is removed through small-load micro-cutting of the diamond abrasive, and the semiconductor wafer with the subsurface almost free of mechanical damage is efficiently obtained.

The invention discloses a method for brazing and connecting diamond and copper through Ag-Cu eutectic brazing filler metal. The method comprises the following steps that S1, coating treatment is conducted on diamond, and surface metallized diamond is obtained after heating activation; s2, copper to be brazed and the surface metallized diamond are subjected to brazed connection through Ag-Cu eutectic brazing filler metal; wherein in the step S1, a titanium layer, a molybdenum layer and a nickel layer are sequentially deposited on the surface of the diamond, and coating treatment of the diamond is achieved. According to the method, the residual stress of the brazed joint can be reduced, the service life of the brazed joint is prolonged, the sealing performance of the brazed joint is improved, and important reference is provided for preparation of the large-size diamond microwave window.

The invention discloses a weak-rigidity free-form surface monocrystalline silicon reflecting lens and a processing method thereof. The method comprises the following steps: obtaining a monocrystalline silicon block; cutting into blocks; diamond wire cutting; precisely grinding the back surface; performing slicing; the free-form surface sucker adsorbs the lens; precisely grinding the front surface into a cylindrical surface; polishing the magnetorheological elastomer; releasing the lens; the cylindrical sucker adsorbs the lens; precisely grinding and thinning the back surface; releasing the lens; cutting edges and carrying out wet etching on the back surface; and carrying out ion beam modification processing to achieve the final surface shape precision of the free-form surface. According to the X-ray reflecting lens machining method, the free-form surface weak-rigidity reflecting mirror is clamped and deformed into the cylindrical surface for machining, the whole process is ultra-precision grinding and polishing of the cylindrical surface, the machining method is simple and mature, the manufacturing cost is extremely low, dependence on an ultra-high-precision multi-axis linkage machine tool is completely eliminated, and the machining precision is greatly improved. And the machining efficiency is greatly improved, and the method is suitable for mass production of reflectors.

The invention discloses a quantum sensor based on an optical fiber type diamond NV color center and a preparation method of the quantum sensor. The quantum sensor comprises diamond particles used for generating the diamond NV color center emitting fluorescence; the multimode optical fiber is used for bearing diamond particles and transmitting optical signals; the diamond particles and the multimode optical fiber form a metal microcavity through silver plating on the surfaces, the metal microcavity is used for binding light to circulate and converge in the cavity, the diamond particles and the multimode optical fiber are coupled, the metal Ag film is plated on the surfaces of the diamond particles and the multimode optical fiber to form a metal microcavity structure, the binding light continuously circulates and converges in the cavity, and therefore the binding light can be effectively restrained. The laser excitation efficiency and the fluorescence collection efficiency are effectively improved, the signal intensity detected by the photoelectric detector is enhanced, and high-precision quantum information detection of NV color center spin characteristics and the like is realized, so that ultra-high spatial resolution detection of a physical field is effectively served.

The invention discloses an underwater magnetic field measuring device based on a diamond NV color center. The underwater magnetic field measuring device comprises a diamond NV color center module, an incident laser excitation module, a multi-path optical coupling module, a microwave excitation module, a fluorescence acquisition and photoelectric conversion module, a signal processing and control module and a magnetic field module, the multi-path optical coupling module is used for dividing an optical fiber into multiple paths and collecting fluorescence generated by the diamond block; the microwave excitation module is used for switching between two single-quantum resonance frequencies to drive an NV color center to realize double-quantum DQ reading; and the signal processing and control module comprises an FPGA (Field Programmable Gate Array) processing unit of a field programmable logic array chip. According to the invention, a dual-quantum DQ working point of a diamond NV color center is used as a measurement channel, common-mode influence of D is removed through differential measurement, the problem of D drift caused by temperature drift, stress and material aging is physically and obviously inhibited, and the device can still realize ultrahigh-sensitivity measurement in a complex underwater environment.

The invention discloses a high-strength wear-resistant self-lubricating drill bit for a coal mine and a preparation method of the high-strength wear-resistant self-lubricating drill bit. The preparation process comprises the steps that a drill bit blank is prepared from low-alloy carbon structural steel, a high-strength and high-toughness matrix is obtained through thermal refining, and then sand blasting activation is conducted to clean and coarsen the surface. After diamond particles are subjected to acid pickling pretreatment, metal modified diamond composite powder is obtained through salt bath metal and reduction prefabrication. The preparation method comprises the following steps: mixing MoS2 with the carbon dioxide, spraying the mixture on the surface of a matrix through high velocity oxy-fuel to form a wear-resistant coating, and then improving the density and interface bonding strength of the coating through high-frequency induction instantaneous remelting, thereby finally obtaining the coal mine drill bit with high hardness, strong bonding force and self-lubricating performance. The metal modified diamond composite coating containing the metal transition layer and the MoS2 lubricating phase is constructed on the steel substrate, and a high-frequency remelting process is combined, so that the wear resistance, the bonding strength and the self-lubricating performance of the drill bit are synergistically improved, and the drill bit has the advantages of high strength and toughness matching and low cost.

The utility model provides a preparation device of a doped diamond film. The preparation device comprises a first main body, a second main body, a heating assembly, a carrying assembly, a vacuum assembly and a laser emission assembly. The first main body is provided with a first cavity, the first cavity is provided with a base station used for bearing a base material, and the first cavity is used for being connected with reaction gas. The heating assembly is arranged in the first cavity, the second main body is provided with a second cavity, and the first cavity and the second cavity can be switched between a communicating state and an isolated state through the switch valve. The carrying assembly is arranged in the second cavity and used for conveying the doping target material from the second cavity to the first cavity or from the first cavity to the second cavity when the first cavity communicates with the second cavity. The vacuum assembly is used for vacuumizing the first cavity and / or the second cavity. The laser emitting assembly is used for emitting laser towards the doping target material located in the first cavity. According to the technical scheme, preparation of the doped diamond film doped with multiple elements is achieved.

To suppress spurious responses and also suppress degradation of main responses.SOLUTION: An elastic wave device 100 includes: a supporting substrate 10; a piezoelectric layer 14 formed on the supporting substrate 10; a pair of comb-shaped electrodes 20 provided on the piezoelectric layer 14; a first insulation layer 11 formed between the supporting substrate 10 and the piezoelectric layer 14, the first insulation layer being made of one of polycrystal or amorphous oxide aluminum and polycrystal or amorphous polysilicon; and a second insulation layer 12 formed between the first insulating layer 11 and the piezoelectric layer 14, the second insulation layer being made of aluminum nitride, silicon nitride, silicon carbide, or diamond-like carbon and having a first surface 60 adjacent to the first insulation layer 11 and a second surface 61 adjacent to the piezoelectric layer 14, and the first surface being rougher than the second surface.SELECTED DRAWING: Figure 1

The invention relates to the field of solid analysis, in particular to a diamond polishing and grinding online detection system which comprises the following steps: firstly, synchronously acquiring optical sensing data and thermal sensing data of the surface of a to-be-detected diamond; then, processing the acquired sensing data to detect and identify various physical characteristics of the surface, including a surface defect state, thermally induced anomaly distribution and self-calibrated surface roughness, and tracking an evolution trend of related characteristics, so as to generate a preliminary multi-dimensional characteristic analysis result; and finally, generating a comprehensive diamond defect surface physical property online evaluation report by integrating various analysis results. The method mainly solves the problems that the multi-dimensional physical characteristics of the surface of the diamond are difficult to evaluate in real time, accurately and comprehensively and the change of the surface state is difficult to respond quickly by a traditional detection means, and aims at comprehensively evaluating the surface quality of the diamond through automatic online analysis and providing a basis for guaranteeing the quality of a final product and optimizing a grinding process.