83 results about "Dlc coating" patented technology

The invention discloses a DLC coating with a gradient composite structure and a surface microstructure and a preparation method of the DLC coating, and belongs to the technical field of hard alloy tool surface treatment. The coating comprises a transition layer, a DLC gradient layer and a laser microstructure layer arranged on the outer surface of a DLC main coating, the transition layer is composed of Cr layers and CrN layers which are alternately stacked; the sp3 bond content of the DLC gradient layer is gradually increased in the direction from the transition layer to the outer surface of the DLC gradient layer, and the W element content in the DLC gradient layer is gradually decreased in the direction from the transition layer to the outer surface of the DLC gradient layer; the laser micro-texture layer is composed of a hexagonal honeycomb-shaped densely-arranged pit array. The coating system has the characteristics of high interface bonding strength and ultralow friction, and the service life of the hard alloy cutter can be remarkably prolonged when the coating system is applied to the surface of the hard alloy cutter.

The invention discloses a method for predicting frictional wear performance of a DLC (diamond-like carbon) coating based on machine learning, and relates to the cross technical field of surface engineering and machine learning, the method comprises the following steps: collecting feature data and label data of the DLC coating, the feature data comprising image data, spectral data and numerical data; cleaning and integrating the acquired data to obtain a multi-modal data set; according to the condition of the data size, a friction and wear performance prediction model of the DLC coating is constructed; based on the obtained multi-modal data set, training a friction and wear performance prediction model of the DLC coating, evaluating the prediction performance of the model by using label data, analyzing samples with large errors, and continuously optimizing the prediction performance; and deploying the trained model in a laboratory management system or an industrial application platform, and rapidly predicting the friction coefficient and the wear rate of the DLC coating. Therefore, by adopting the method, the depiction capability of the microstructure of the DLC coating can be remarkably improved, the prediction precision is improved, and the method is suitable for various combined working conditions, simple in calculation and high in efficiency.

The invention discloses a super-lubricating and corrosion-resistant DLC (diamond-like carbon) protective coating and a preparation method thereof, and belongs to the technical field of protective coatings. The coating is prepared on a base body through magnetron sputtering and magnetic filtering arc ion plating processes, a multi-layer composite structure is formed by doping transition metal elements and non-metal elements, and the multi-layer composite structure comprises a cleaning modification layer, a gradient transition layer, a combination strengthening layer, a main functional layer and a surface lubricating layer. Through element doping, the internal stress of the DLC coating is effectively reduced, the surface lubricity is enhanced, the bonding strength of the coating and a matrix is improved, and meanwhile the high hardness and excellent wear resistance of the DLC coating are reserved. In addition, the preparation process is simple, is suitable for industrial production, and can be widely applied to surface protection in the fields of molds, automobiles, aerospace and the like.

The invention relates to a diamond-like carbon coating and a preparation method thereof, and belongs to the technical field of coatings. The preparation is carried out in a closed field unbalanced magnetron sputtering system, and the system is at least provided with a titanium target, a graphite target and a linear ion source; the preparation method comprises the following steps: pretreating a base material, removing surface moisture, transferring the base material into a vacuum chamber, and carrying out ion cleaning and activation; adjusting bias voltage, then turning on a titanium target power supply, cleaning a target surface, depositing a gradient layer, turning off the titanium target power supply, turning on a graphite target power supply to carry out hydrogen-free deposition, and after deposition is finished, carrying out furnace cooling in a vacuum environment. According to the diamond-like carbon coating provided by the invention, the graphite target material is adopted, under the condition that hydrogen-containing gas and a metal transition layer are not introduced, a closed field unbalanced magnetron sputtering technology is combined with linear ion source auxiliary deposition, the DLC coating with excellent biocompatibility is prepared, and the problem of biotoxicity caused by element dissolution is greatly reduced.

The invention discloses a novel method for detecting the thickness of a diamond and diamond-like carbon coating layer based on X-rays, which adopts X-ray nondestructive detection and adds an optimization algorithm, can solve the influence of residues on a detection result by an algorithm for single-ray mutual interference of the same element, and can improve the detection accuracy. The optimization algorithm and the method can be applied to the thickness of diamond grown in the surface physical modification direction of chip products, diamond-like carbon (DLC) coatings on the surfaces of hard alloys such as tool steel and structural materials, CVD (chemical vapor deposition) diamond coatings and the like. The method is also applicable to other element thicknesses of which the surfaces are not detected by the energy dispersion X-ray fluorescence spectrometer, such as nitrogen N layers and oxygen O layers, and also comprises cicada wing membranes or biological bionic membranes in the biological direction. In the aspect of chemical industry, the method is suitable for PE polyethylene and epoxy resin.

The invention provides a diamond-like coating for the surface of a ceramic matrix and a preparation method thereof, and belongs to the technical field of sealing materials, the preparation method specifically comprises the following steps: S1, adopting a linear ion beam technology, taking argon as working gas, and performing etching treatment on the surface of the ceramic matrix by utilizing ionized argon ions to obtain a zigzag microstructure; s2, a linear ion beam chemical vapor deposition method is adopted, acetylene / methane serves as working gas, the hydrocarbon precursor is ionized on the surface of the ceramic matrix subjected to etching treatment to form an interface mixing layer, and then the diamond-like coating is deposited to obtain the diamond-like coating used for the surface of the ceramic matrix. Compared with the prior art, the ion beam etching process is adopted to form the microstructure and the interface mixing layer on the surface, the influence of interface mismatching of the substrate and the DLC coating is reduced, the film-substrate binding force is improved, the supporting capacity of the surface DLC coating is improved, and high bearing is achieved.

The application provides a wear-resistant and pull-resistant breaking hammer piston base surface coating and belongs to the technical field of breaking hammer piston surface coating. It solves the problem that the outer circle of the existing breaking hammer piston is only quenched and tempered, the base material is directly exposed, is easily pulled under the working condition of impurity-containing hydraulic oil and eccentric impact, and after being pulled, the sealing is invalid and oil leaks, which leads to the decline of the impact force of the breaking hammer, low efficiency and even unable to work. The wear-resistant and pull-resistant breaking hammer piston base surface coating is characterized in that the piston base surface comprises a protective coating composed of a Cr transition layer, a Cr and WC composite coating, a WC and C composite coating and a DLC coating. The application has the advantages of not needing to use other ion source ionized acetylene, reducing the process steps of the existing coating film, controllable process, high product stability and avoiding product pull and oil leakage.

This invention belongs to the field of thin film deposition technology and relates to a method for improving the uniformity and quality of DLC coatings prepared by PECVD. Based on PECVD equipment, a method for preparing uniform, highly wear-resistant / corrosion-resistant DLC coatings on irregularly shaped workpieces by controlling a rotating magnetic field is provided. The method includes a vacuum chamber system, a dynamic magnetic field generator, a radio frequency plasma excitation system, a dual-path gas supply system, and a vacuum and pressure regulation system. The dynamic magnetic field generator uses two sets of ring-arranged neodymium iron boron permanent magnets, driven by a motor to rotate the magnetic field vector. The top spray electrode and the bottom ring ground electrode form the main discharge circuit. The rotating magnetic field increases the number density of active groups and molecular kinetic energy during deposition. Different gas ratios are used during coating deposition to achieve high-density, high-quality DLC coatings. The workpiece for DLC coating deposition is placed at the bottom of the reaction chamber. This method is used to deposit uniform, highly wear-resistant, and highly corrosion-resistant DLC coatings on planar or irregularly shaped workpieces.

To provide a hydrogenated DLC coating that makes it possible to obtain good performance.SOLUTION: Disclosed is a part including a metal substrate, a non-hydrogenated amorphous ta-C or a-C carbon coating that coats the substrate, and an undercoat which is based on chromium (Cr), carbon (C) and silicon (Si) and is disposed between the metal substrate and the amorphous carbon coating and to which the amorphous carbon coating is applied, characterized in that the undercoat included, at its interface with the amorphous carbon coating, a ratio of silicon in atomic percent to chromium in atomic percent (Si / Cr) of 0.35 to 0.60, and a ratio of carbon in atomic percent to silicon in atomic percent (C / Si) of 2.5 to 3.5.SELECTED DRAWING: None

A DLC coating and a preparation method and device therefor, a composite coating and a coated product. The DLC coating is obtained by the deposition of a hydrocarbon monomer and a silane monomer via a PECVD method. A hydrocarbon monomer and a silane monomer may undergo reaction and deposition at room temperature to form a coating, such that the influence of a relatively high temperature of a conventional coating manner on the performance of a substrate is effectively avoided. The formed DLC coating has the characteristics of a low color difference, high transparency and high bonding strength; and a preparation method therefor is simple, which is conductive to process production. Moreover, a composite coating obtained by depositing an AF coating on the DLC coating has the characteristics of a low color difference, high transparency, and better scratch resistance, and is particularly suitable for coated products such as a touch panel.

The utility model relates to the technical field of gas turbine equipment, and discloses a torque shaft bearing attached with a DLC (diamond-like carbon) coating, which comprises a rolling body and a bearing mounting seat, a shaft hole is arranged on the rolling body in a penetrating manner, the side wall of the rolling body is provided with the DLC coating, and the rolling body is arranged in the bearing mounting seat. The torque shaft bearing is convenient to install and assemble and can stably operate for a long time, and the using effect of the torque shaft bearing is effectively improved.

Method for producing a hydrophilic cover layer (1) of a sensor membrane (2) which has a contact angle q of < 90° with water, comprising - providing a sensor membrane (2) comprising a medium-facing silicone film (3), - Coating the silicone film (3) with diamond-like carbon (DLC), wherein the coating step is selected from physical vapor deposition (PVD), chemical vapor deposition (CVD), for example by ECR (electron cyclotron resonance)-CVD, laser evaporation and sputtering, preferably magnetron sputtering, whereby a cover layer (1) is formed which, during operation, comes into contact with the medium and comprises the diamond-like carbon coating (5) and the silicone film (3), - Treating the cover layer (1) with a sterilizing agent.

The invention discloses a surface modified aluminum alloy and a preparation method thereof, and belongs to the technical field of metal surface treatment.The preparation method comprises the following steps that S1, an aluminum alloy workpiece is sequentially subjected to ultrasonic oil removal, alkali corrosion, composite acid pickling and water washing treatment; s2, the treated workpiece serves as an anode and is placed in a chromium-free composite electrolyte for anodic oxidation; s3, cleaning and drying the treated workpiece, putting the workpiece into magnetron sputtering equipment, carrying out sputtering cleaning, and then switching to a carbon-containing target material to deposit a DLC (Diamond Like Carbon) coating; and S4, the treated workpiece is subjected to hole sealing treatment in deionized water at the temperature of 80-100 DEG C for 20-30 min, the workpiece is taken out and dried, and the surface modified aluminum alloy is obtained. The modified aluminum alloy prepared through the method is provided with the high-density nano-porous anodic oxide layer, the binding force between the modified aluminum alloy and the functional coating is high, microhardness is high, salt spray corrosion resistance and abrasion resistance are excellent, and the technology is environmentally friendly and stable.

The invention discloses a coating method for prolonging the service life of a mold. The coating method comprises the following steps: 1) cleaning the mold; 2) drying the mold; and (3) the DLC coating is prepared on the surface of the mold through a magnetron sputtering method. The problem that the surface of the die is scratched can be effectively solved, the problem of oxidation of the surface of the die can be reduced, the service life of the die can be prolonged, and the cost of product machining and production is greatly reduced.

A carrier recycling process designed to recycle carriers discarded after use for a certain period of time. The carrier recycling process includes dipping a carrier to be discarded in an organic solvent to remove a bond and to separate a body and an insert from each other, securing a surface roughness of one side surface of the body from which the insert has been separated, depositing a diamond-like-carbon (DLC) coating layer on the one side surface of the body having the secured surface roughness using a PECVD process, and coupling the insert to a circumference of the body having the DLC coating layer deposited thereon.

This invention belongs to the field of test probe fabrication technology, specifically a method for preparing a special coating for spring probes. The method includes: depositing a Si gradient transition layer on the surface of a spring substrate, followed by oxygen plasma activation treatment to form a specific active pinning layer of 3 to 5 nanometers; then depositing a DLC coating using a specific process, employing a specific peak voltage and a specific duty cycle pulse bias mode to pre-position dispersed carbon clusters. The SixOy pinning layer provides dual anchoring of chemical bonding and mechanical interlocking for the DLC coating during cyclic stress-induced graphitization transformation, preventing microcracks from propagating to the interface and ensuring the safe operation of the adaptive lubrication process. This invention overcomes the technical bottleneck of fatigue spalling of DLC coatings on elastic components, significantly improving the service life of spring probes.

The invention discloses a multi-element and multi-layer DLC coating and a preparation method and application thereof, and belongs to the technical field of coatings, the multi-element and multi-layer DLC coating sequentially comprises a CrC-1 layer, a DLC-1 layer, a DLC-2 layer, a CrC-2 layer and a DLC-3 layer from a base body to the surface, the thickness of the multi-element and multi-layer DLC coating is 2.4-10 microns, and the affinity of CrC with the base body and the DLC coating is high, so that the CrC layer is selected as a base coat, and the DLC coating has the advantages that the CrC layer is used as the base coat; and the interface bonding force between the DLC layer and the substrate is improved. In addition, the CrC-2 layer is designed to be a middle layer of the DLC-2 layer and the DLC-3 layer, so that the interlayer interface stress of the DLC is reduced, and the interlayer binding force of the DLC is improved. When the DLC-1 layer and the DLC-2 layer are prepared, incremental bias voltage is adopted, the internal stress of the coating is reduced, the binding force of the multi-element and multi-layer DLC coating is improved, the binding force of the prepared multi-element and multi-layer DLC coating is high, and application under the heavy load abrasion condition is ensured.

The invention relates to a system (1) comprising two contacting parts (10, 20) lubricated by a lubricant (30), at least one of the two parts (10) comprising a substrate (11) and an amorphous carbon-based coating (12) applied to the surface of the substrate (11), the amorphous carbon-based coating (12) of the first of the two parts (10) comprising at least one DLC coating (13), and the lubricant (30) comprising at least one base (31), the base (31) being monoglycol, the content of the base (31) in the lubricant (30) being at least 50 wt.% of the lubricant (30). It also relates to a valve distribution system comprising such a system (1), and to the use of a lubricant in a mechanical system comprising two parts in contact with each other. Figure for the abstract: Fig. 1

The application discloses an artificial blood vessel joint and a preparation method thereof. The blood vessel joint adopts a carbon-based material as a base body, a double-layer composite coating with PyC and Ag-doped DLC and an Ag-doped DLC coating are prepared on the inner wall and the outer wall respectively, and the blood vessel joint is obtained; the inner wall of the blood vessel joint is smooth and compact, which is beneficial to blood circulation; the outer wall is a porous Ag-doped DLC coating, which is beneficial to biological fixation with tissues; the Ag-doped DLC coating endows the blood vessel joint with good antibacterial property, reduces inflammation, and can improve the adverse reaction of the human body caused by friction and powder loss after the blood vessel joint is implanted into the human body.

The utility model discloses an extrusion die for copper bar production, which belongs to the technical field of extrusion dies and is characterized in that one end of an extrusion die body is fixedly connected with a mounting plate, the surface of the mounting plate is provided with mounting holes which are annularly distributed at equal intervals, one end of the extrusion die body is provided with a die hole, and one end of the die hole is provided with a working tape; according to the extrusion die for copper bar production, a flow guide nozzle can be additionally arranged at the discharging end of the extrusion die body through the connecting part arranged on the extrusion die body, and the stroke of a working belt is increased through a flow guide hole, so that the copper bar subjected to extrusion molding cannot be bent and wavy; and the flow guide coating is arranged on the inner wall of the die hole, the flow guide coating is a DLC coating, the hardness of the inner wall of the die hole can be greatly improved, meanwhile, the friction coefficient of the inner wall of the die hole is extremely low, deformation, abrasion and metal filing remaining of the die hole are avoided, and then the surface of the copper rod is prevented from being scratched and bruised.

The invention discloses a joint replacement full-stage self-adaptive Ag-DLC coating and a preparation method thereof, the coating comprises a bio-friendly substrate, a titanium bonding layer and an Ag-element-doped Ag-DLC functional layer, the Ag element in the functional layer is embedded in a DLC carbon skeleton in the form of Ag nanoparticles, the size of the Ag nanoparticles is 1-35 nm, and the doping amount is 2-40 at.%. According to the invention, the DLC coating with the nanocrystalline / amorphous composite structure characteristic is constructed by doping the Ag element with the anti-bond characteristic, so that the synergism of functions such as mechanical bearing, abrasion resistance, antibacterial property and biocompatibility can be realized. By means of controllable release of the Ag nanoparticles, self-adaptive response of functional characteristics of the metal joint implant in the whole service stage can be achieved, the requirements of the coating on the antibacterial performance and biocompatibility in the early postoperative stage can be met, and reliable anti-abrasion protection and osteogenesis promoting functions can be provided for the stable postoperative service stage.

The invention provides an ultrasonic guided wave probe suitable for high-temperature liquid metal and an acoustic parameter measurement method, and the ultrasonic guided wave probe comprises PZT piezoelectric ceramic which is physically connected with a waveguide rod through a gel type coupling agent and achieves acoustic coupling; the surface of the bottom of the waveguide rod is coated with a DLC coating, the DLC coating is deposited through a vacuum evaporation coating technology, and the surface roughness meets the requirement of sound signal attenuation minimization; the heat dissipation device is arranged on the outer wall surface of the waveguide rod and used for controlling the temperature of the piezoelectric ceramics; the length of the waveguide rod is integer multiples of the wavelength of the sound wave and is optimized and determined by combining the heat dissipation requirement. According to the invention, conventional piezoelectric ceramic is used, and only a coupling agent, a section of stainless steel tube with a coating and matched air cooling heat dissipation are needed, so that ultrasonic measurement of high-temperature liquid metal can be realized; meanwhile, based on the probe design, the acoustic coupling effect of the waveguide rod and the liquid metal to be measured is considered, and a corrected attenuation coefficient measurement method is provided, so that the result is more accurate.

The utility model discloses a DLC (diamond-like carbon) coating cutter, which relates to the technical field of DLC coating cutters and comprises a cutter handle, a cutter bar, two groups of bolts, an outer frame, a driving rod, a gear set, a support and a guide plate, the cutter handle is mounted on a numerical control machine tool, the cutter bar is mounted on the lower portion of the cutter handle, the lower portion of the cutter bar is a cutter head end, and the two groups of bolts penetrate through the cutter handle and the cutter bar in a threaded manner. The outer frame is rotationally connected to the outer portions of one ends of the two bolts, the driving rod is rotationally connected to the middle section of the outer frame, the driving rod and the two bolts are sleeved with the gear set, the gear set is located in the outer frame, and the driving rod drives the two bolts to rotate in the same direction through the gear set. The two sets of bolts penetrate through the four sets of first screw holes and the two sets of second screw holes in a threaded mode, so that assembling and fixing of the cutter handle and the cutter bar are achieved, or the free ends of the two sets of bolts move into the two sets of first screw holes in one side of the outer frame to make contact with fixing of the cutter bar, the cutter handle and the cutter bar can be rapidly assembled and disassembled through the structure, and operation is convenient and fast.

The application discloses a kind of nitrogen-doped diamond / intrinsic diamond periodic multilayer structure and preparation method thereof, belong to surface treatment technical field.The application includes: bearing matrix surface is polished and polished, and is washed and dried;Using multi-arc ion plating process, carbon target is used as reaction target material, nitrogen is input, and nitrogen-doped diamond layer is deposited on the surface of bearing matrix;Nitrogen is closed, carbon target is used as reaction target material, and intrinsic diamond layer is deposited on the surface of nitrogen-doped diamond layer;The deposition step is repeated, and nitrogen-doped diamond layer and intrinsic diamond layer are alternately stacked in the way of cyclic deposition until reaching the preset total thickness, and nitrogen-doped diamond / intrinsic diamond periodic multilayer structure is formed.By multilayer interface, stress is effectively released, crack is deflected, and the problem of large brittleness and easy peeling of traditional single-layer DLC coating is overcome, and the coating toughness is significantly improved on the basis of maintaining excellent wear-resistant and friction-reducing performance.

The present invention provides a rubber roller carbon coating method in which DLC coating of the surface of a rubber roller is performed using an ion source, and in which the coating time and the aging time (also referred to as the cooling time) are distributed and a coating cycle is controlled using same as one coating cycle so that problems, such as surface cracks on a rubber roller, caused by heat, ultraviolet rays and the like generated during coating using plasma can be prevented.

This invention relates to a method for surface modification of key friction pairs in internal combustion engines based on laser cladding and diamond-like carbon (DLC) composite coatings, belonging to the field of surface strengthening and remanufacturing technology for key internal combustion engine components. Two functional transition layers are sequentially prepared on the substrate of the key friction pair using laser cladding technology: first, a Ni60-Cu alloy layer is clad as a toughness buffer layer to alleviate thermal stress and improve the bonding strength with the substrate; then, a WC particle-reinforced Ni-based alloy layer is clad as a reinforcing support layer to provide a high-hardness substrate; after polishing the cladding layers, a DLC coating is prepared on the polished surface using cathodic arc deposition. This invention solves the problems of weak adhesion and easy peeling of DLC coatings on gray cast iron through a gradient material design and sequential process of toughness buffering, reinforcing support, and ultra-hard friction reduction. The prepared friction pair possesses high interfacial bonding strength, excellent fatigue resistance, and friction-reducing and wear-resistant properties, extending the service life of the friction pair under harsh operating conditions.

The invention discloses a coating method for a threaded rod. The coating method comprises the following steps: etching and cleaning the threaded rod to be coated; forming a transition layer on the surface of the cleaned threaded rod through sputtering; and depositing a DLC coating on the surface of the transition layer. According to the technical scheme, the surface of the threaded rod is coated, so that the problems of inaccurate and unsmooth linear motion caused by abrasion of the threaded rod can be effectively solved.

Embodiments described herein relate to substrate holder systems. An apparatus includes a base structure of a substrate holder, a passivation layer formed on a surface of the base structure, and a diamond-like carbon (DLC) coating formed on the passivation layer. The substrate holder is to receive a substrate. The passivation layer provides corrosion resistance for the substrate holder with respect to at least one process chemistry. The DLC coating provides wear resistance for the substrate holder.

This application discloses an adjustable slit coating die for perovskite solar cell production, relating to the field of perovskite solar cell production equipment technology. It includes a modular slit adjustment structure located at the working end of a coating machine, consisting of an upper die lip and a lower die lip connected by a piezoelectric ceramic drive unit that responds to film thickness monitoring signals. A built-in temperature control module includes a miniature thermoelectric cooler, a temperature sensor, and a DLC coating embedded inside the die, covering the inner wall of the flow channel. An online film thickness monitoring device uses laser interferometry data to measure thickness and provide feedback signals. A chambered flow channel structure includes at least two independent liquid supply chambers, each equipped with a high-precision screw pump and a pressure feedback system. The modular slit adjustment structure achieves sub-micron level dynamic control of the perovskite coating thickness, improving slit adjustment accuracy and die durability.