50 results about "Dlc coating" patented technology

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 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.

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.

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 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.

This invention belongs to the field of material surface coating technology, and relates to a lubricating coating and its preparation method. It is particularly applicable to a surface-textured low-friction diamond-like carbon (DLC) solid-liquid composite lubricating coating and its preparation method used in mechanical moving parts. The coating is deposited on the friction surface of a substrate with relative frictional motion. It includes a diamond-like carbon (DLC) base coating as a solid phase and a lubricating oil layer as a liquid phase filling the spaces between the friction pairs. The DLC base coating is directly deposited on the friction surface of the substrate, and its surface is textured to form a regularly arranged micro-textured array. The lubricating oil layer is distributed at the friction interface where the micro-textured array is located and fills the interior of the micro-textured array. This application's solution constructs a surface array structure with micro-oil reservoirs and dynamic pressure bearing functions through the micro-textured design and control of the DLC solid phase surface, thereby achieving synergistic lubrication enhancement between the DLC coating and the lubricating oil at the physical mechanism level.

The utility model provides DLC (Diamond Like Carbon) coating deposition equipment. The DLC coating deposition equipment comprises a furnace body, a rotating stand vehicle, two fans and two conveying components, the rotating stand vehicle is arranged at the central position in the furnace body; the two fans are respectively mounted on the outer surface of the furnace body; the two conveying assemblies are arranged in the furnace body, each conveying assembly comprises a plurality of hollow plates, a plurality of air outlet holes and a plurality of conveying pipes, the hollow plates are sequentially installed on the inner wall of the furnace body from left to right, the air outlet holes are formed in the surfaces of the hollow plates, and the conveying pipes are connected between the hollow plates. According to the DLC coating deposition equipment provided by the utility model, the plurality of hollow plates, the plurality of air outlet holes and the plurality of conveying pipes are arranged on the inner wall of the furnace body and are matched with the fan for use, so that when gas is conveyed into the furnace body, the gas can be conveniently conveyed at different positions in the furnace body; therefore, the uniformity of whole gas conveying can be improved.

The utility model relates to the technical field of mold sliding blocks, and discloses a multi-cavity linkage type mold sliding block anti-jamming mechanism which comprises a guide sliding rail, a guide opening is formed in the top of the guide sliding rail, a power cavity is formed in the guide sliding rail, and two screw supporting seats are arranged in the power cavity in a bilateral symmetry mode. A screw rod is installed between the two screw rod supporting seats, one end of the screw rod penetrates through the screw rod supporting seats and is connected with a motor through a coupler, the bottom of the motor is connected with the bottom of the power cavity of the guide sliding rail, and the screw rod is connected with a nut seat through a lead screw nut. The top of the nut seat penetrates through the guide opening and is connected with a sliding block. The DLC coatings are sprayed on the bottom surface of the sliding block and the contact surface of the guide sliding rail and the sliding block, and the sliding block is made of the CuZn39Pb3 copper-based alloy, so that the friction force between the sliding block and the guide sliding rail can be reduced, and the anti-jamming effect is realized.

The invention discloses a shafting antifriction and vibration reduction method based on coating and profile optimization and a related device, and relates to the field of shafting friction and vibration control, the method comprises the following steps: based on cam profile design requirements and constraint conditions, and based on a cam profile multi-objective optimization model, obtaining an optimized cam profile contour; according to the optimized cam profile contour and the target coating parameter set, based on the DLC coating-containing cam pair interface contact friction analysis model, the transient friction lubrication state is determined, the interface friction coefficient and the driving torque of the coating-containing cam pair are calculated, the driving torque serves as excitation to be input into a cam shaft system torsional vibration analysis model, and the cam shaft system torsional vibration analysis model is obtained. A shafting dynamic response under the current target coating parameters is obtained; and comparing and analyzing the dynamic shaft system response under each current target coating parameter, selecting the target coating parameter with the optimal dynamic shaft system response as the optimal coating parameter, and taking the corresponding optimized cam profile contour as the optimal cam profile contour.

To provide a self-aligning roller bearing that improves wear resistance and suppresses grease degradation. [Solution] When the shortest radial distance of the cage between the rolling surface of each spherical roller and the circumferential side surface of each column is H1, and the shortest radial distance of the cage between the opposing surface and the end face when each spherical roller is furthest from the surface on the inner surface of each pocket that faces the end face of each spherical roller, H2 satisfies H1 ≥ H2. At least one of the outer ring, inner ring, and spherical roller is made of alloy steel for rolling parts with a carbon content C of 0.4 to 0.7 by weight, carburized and quenched to an additional carbon content of 0.35 to 1.0 by weight on the surface and a solid solution carbon content of 0.75 to 1.1 by weight on the surface, with a core hardness of HRC 40 to 64. A DLC coating is provided on the rolling surface of the spherical roller 30, and the DLC coating is mainly made of tungsten carbide or silicon carbide and carbon, with a film thickness of 1 to 2 μm.

This invention discloses a carbon-based lung nodule localization needle and its preparation method. The localization needle uses a carbon-based material as a substrate, on which a pyrolytic carbon (PyC) coating and a silver-doped DLC (DLC) composite coating are prepared. The PyC coating provides a continuous interface to improve the bonding ability between the silver-doped DLC composite coating and the carbon-based material. The silver-doped DLC composite coating effectively reduces the surface friction coefficient of the carbon-based material, improving its wear resistance and hardness. It also mitigates adverse reactions in the human body caused by frictional powdering of the carbon-based material after implantation. Furthermore, the silver-doped DLC coating imparts good surface biocompatibility and antibacterial properties to the carbon-based material. In particular, the silver-doped DLC composite coating exhibits high bonding strength and good stability with the carbon-based material surface, extending its service life.

The invention relates to a semiconductor diamond V-shaped chopper and a preparation method thereof in the technical field of welding choppers, the semiconductor diamond V-shaped chopper comprises a chopper main body and a chopper mouth, the chopper mouth is welded at the front end of the chopper main body, the front end of the chopper mouth is provided with a V-shaped welding groove, the V-shaped welding groove is formed through electric spark machining, the chopper main body is made of a tungsten steel bar, and the chopper main body is made of a silicon steel material. The riving knife mouth is made of PDC diamond compacts. The preparation method of the riving knife mouth comprises the steps of selecting raw materials, segmenting the compacts, welding, polishing, machining a positioning datum plane and four conical surfaces, machining a V-shaped welding groove through electric spark and the like. The service life of the chopper can be prolonged to 120 million times, the service life of the chopper is 3-5 times that of a mainstream tungsten carbide (DLC coating) chopper and 2-3 times that of a new material silicon carbide chopper, and the product has the advantages of being good in shape maintaining performance, wide in application range and the like.

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.

The invention relates to a system (1) comprising two parts (10, 20) in lubricated contact by means of a lubricant (30), wherein at least a first of the two parts (10) comprises a substrate (11) and an amorphous carbon-based coating (12) applied to the surface of the substrate (11), wherein the amorphous carbon-based coating (12) of the first of the two parts (10) comprises at least one DLC coating (13), and wherein the lubricant (30) comprises at least one base (31), the base (31) being composed of mono-glycol, the content of the base (31) in the lubricant (30) being at least 50 wt.% of the lubricant (30). The invention also relates to a valvetrain system comprising such a system (1) and to the use of a lubricant in a mechanical system comprising two parts in contact with one another.

This invention relates to the field of "mechanical-chemical" synergistic interface strengthening technology for improving the adhesion of DLC coatings. It is a method that forms a "mechanical-chemical" synergistic interface strengthening through surface texturing of the substrate and multi-layer structure design of the DLC coating, which effectively improves the film-substrate adhesion. The concentration of the deposited Cr / WC transition layer exhibits a gradient change, which can achieve a gradient increase in coating hardness and buffer film stress. By adopting a combination of multi-layer structure and doping, the internal stress of the coating is effectively released, thereby improving the film-substrate adhesion and achieving a gradient increase in hardness, reducing the probability of brittle coating detachment.

The application belongs to the technical field of metal surface treatment, and discloses a preparation method of a DLC coating on a titanium alloy surface, which comprises the following steps: cleaning and drying a titanium alloy substrate, laser polishing treatment, laser texture treatment, deburring treatment and DLC coating deposition; the laser polishing treatment is carried out in a nitrogen atmosphere, so that the grain refinement of the titanium alloy surface and the generation of TiN crystals are realized, a transition layer with moderate hardness is provided for the DLC coating, the hardness difference between the titanium alloy and the DLC coating is moderated, the stress difference and stress concentration phenomenon caused by external force or temperature change are reduced, and the bonding force is enhanced; meanwhile, the microstructure generated by the laser texture treatment increases the contact area of the DLC coating and the titanium alloy substrate, and a mechanical interlocking structure is formed, so that the adhesion of the DLC coating is further enhanced; therefore, the bonding force between the DLC coating and the titanium alloy substrate can be effectively improved.

The application discloses a shafting friction and vibration reduction method and related device based on coating and profile optimization, relates to the field of shafting friction and vibration control, and comprises the following steps: obtaining an optimized cam profile contour based on a cam profile design requirement and constraint condition and a cam profile multi-objective optimization model; determining a transient friction lubrication state based on a cam pair interface contact friction analysis model containing a DLC coating according to the optimized cam profile contour and a target coating parameter set, calculating an interface friction coefficient of the cam pair containing the coating and a driving torque, inputting the driving torque as an excitation into a cam shafting torsional vibration analysis model, and obtaining a shafting dynamic response under a current target coating parameter; comparing and analyzing the shafting dynamic responses under each current target coating parameter, selecting a target coating parameter with the optimal shafting dynamic response as an optimal coating parameter, and taking a corresponding optimized cam profile contour as an optimal cam profile contour.

The utility model provides a phase gradient change diamond-like carbon coating, which is characterized in that a priming coat, a diamond-like carbon (DLC) coating and one or more groups of circulating coatings are sequentially arranged from at least one side of a base material to the outside, and the circulating coatings sequentially comprise a first transition layer, a GLC coating, a second transition layer and a DLC coating from the DLC coating to the outside. Through the ingenious design, smooth transition between a three-dimensional structure and a plane structure is achieved, structural disorder possibly occurring at the coating interface is avoided, the bonding strength between the DLC coating and the GLC coating is remarkably enhanced, therefore, the internal stress of the coating is effectively relieved, and the overall service life of the coating is greatly prolonged.

The invention discloses a DLC-based coating material for the surface of a slit coating mold and a preparation method of the DLC-based coating material. The DLC-based coating material comprises elements Al and C to form an Al-DLC coating material or comprises elements Al, C and N to form an Al / N-DLC coating material. The preparation method comprises the following steps: depositing the Cr / CrxAlyC gradient transition layer on the surface of the substrate by sputtering a graphite target, a Cr target and an Al target by adopting an unbalanced magnetron sputtering technology, and finally depositing the Al-DLC coating by sputtering the graphite target and the Al target or depositing the Al / N-DLC coating by sputtering the graphite target and the Al target and introducing nitrogen. The hardness and corrosion resistance of the prepared DLC-based coating material are improved, and an effective anti-corrosion measure is provided for a slit coating mold.