193 results about "Dlc coating" patented technology

An RF ablation device comprises an electrode including a DLC coating deposited on at least a portion thereof. A method of forming an RF ablation device, comprises forming a DLC coating on a portion of a metallic electrode.

Downhole apparatus and methods of using the apparatus are described, the apparatus comprising at least one metallic component having a DLC coating thereon, the coating present at least on one or more internal passageways of the base metal or alloy to be exposed to downhole environments. Methods of using an apparatus in downhole oilfield operations are also described. This abstract allows a searcher or other reader to quickly ascertain the subject matter of the disclosure. It will not be used to interpret or limit the scope or meaning of the claims.

An earth-boring bit has a seal assembly with a seal face having a DLC coating. The seal assembly locates between a bearing pin and a cone of the bit. The seal assembly has at least one rigid ring that rotates against a mating surface. The DLC coating is diamond-like carbon that may be coated by different processes onto either the ring, the mating surface, or both.

A roller cone bit is provided that includes a wear resistant diamond-like carbon coating applied to a bearing shaft, where it is in sliding contact with the bearing seal. The wear resistant diamond-like carbon coating reduces wear and corrosion of the head bearing shaft sealing surface and provides extended life to the bearing seal.

The invention relates to a multi-ion-beam sputter-deposition technology for doping a diamond-like carbon (DLC) coating. The technology is characterized by comprising the following steps of: firstly, washing to removing a polluted layer on the surface of a workpiece by utilizing ultrasonic waves, and carrying out ion beam bombardment washing on the surface of the workpiece by utilizing an argon-ion beam generated by an ion source to obtain an atomic scale clean surface; then preparing a gradient transition layer by utilizing an auxiliary ion beam sputter-deposition method; and finally, synthesizing a multi-element doped DLC coating on the gradient transition layer by utilizing multi-ion-beam sputtering and low-energy ion beam auxiliary deposition. In the process of synthesizing the multi-element doped DLC coating by utilizing the multi-ion-beam sputtering and the low-energy ion beam auxiliary deposition, carbon particles and metallic particles which are generated by bombarding a graphite target and a metallic target are deposited by using a sputtering ion source, and gas ions generated by an auxiliary deposition ion source continuously bombard the surface of a grown film layer to regulate and control the microstructure of the film layer and realize multi-element doping.

The present invention relates to an electric hair clipper blade assembly having a guide plate connected with a fixed blade and a movable blade that moves in a left and right direction or horizontal direction and a connection/fixed member. In particular, the present invention relates to an electric hair clipper blade assembly having fixed and movable blades with depths deeper than those of conventional fixed and movable blades and a blade body DLC-coated, on which a portion of the guide plate, the fixed blade, and the movable blade are formed, to maintain fairly good cutting power in cutting short hair or curly hair.

A piston ring with a DLC coating comprises an adhesive layer on a base material from inside to outside, an amorphous metallic hydrocarbon layer and an amorphous non-metallic hydrocarbon layer, wherein primarily sp² bonds predominate in the metallic hydrocarbon layer and the non-metallic hydrocarbon layer comprises sp²and sp³ bonds, the sp³ bond fraction being higher than in the metallic hydrocarbon layer so that an electrical resistance of the DLC coating arises, said resistance being in the range greater than 5000 ohms, in particular greater than 5000 kohms.

The invention discloses a surface compound strengthening process for an aluminum alloy material, aiming to solve the problems that chemical plating of Ni, Ni-P and Ni-W-P or electroplating of Ni and Cr for aluminum and aluminum alloy has good bonding strength but low rigidity and poorer wear resistance, and vacuum coatings of CrN, TiN, TiAlN, TiCN or DLC for an aluminum alloy material have high rigidity and good wear resistance but poorer bonding strength with a substrate. The surface compound strengthening process disclosed by the invention comprises the following steps: firstly, plating a 2-10mu m thick gradient transition layer on the surface of an aluminum alloy substrate, then baking for 1-2 hours at constant temperature of 75-85 DEG C in a dry environment, and finally depositing oneor multiple coatings of CrN, TiN, TiAlN, TiCN or DLC on the aluminum alloy substrate by a vacuum coating technology. The surface compound strengthening process can improve the bonding strength between the vacuum coating and the aluminum alloy substrate, and simultaneously the surface of the aluminum alloy substrate has higher rigidity and wear resistance.

The invention discloses a method for preparing a Ti-doped diamond-like carbon (DLC) coating, which comprises steps as follows: a pretreated matrix is put on a turner post of electric arc-magnetron sputtering composite coating equipment; by using a column arc Ti target as a Ti source and three pairs of planar C targets as C sources, the column arc Ti target and planar C targets are uniformly distributed on the inner wall of the furnace body, and high-purity Ar is used as a main ionization gas to ensure the effective glow discharge process; and high-purity N2 used as a reactant gas is ionized and combined with elements Ti and C so as to deposit and form the Ti-doped DLC coating on the matrix surface. The prepared Ti-doped DLC coating appears black, and has a smooth and compact surface; the coating hardness is 28GPa, the film-base binding force is up to 60N, and the coating thickness is 2.5 mu m; and when the friction pair is Al2O3 balls, the dry friction coefficient of the coating is 0.2. Thus, the Ti-doped DLC coating has favorable wear resistance and anti-friction property.

The invention relates to a cover, a mobile communications apparatus and a method for producing a coated cover for an electronic apparatus. According to the invention at least a part of the cover is coated with a DLC-coating, also called an amorphous diamond coating.

The invention discloses a method and equipment for preparing ultra-hard DLC (Diamond-like Carbon) coatings through PVD (Physical Vapor Deposition) and HIPIMS (High Power Impulse Magnetron Sputtering). By adopting a multilayer film compositing technology and using a PVD process and an HIPIMS method, and through cathode and anode bias adjustment and acetylene gas flow control, and the design of the equipment for preparing the DLC coatings in an industrialized manner, that the ultra-hard DLC coatings are prepared by the equipment on surfaces of workpieces is achieved, and the coatings are ultra-high in hardness, high in friction resistance, high in wear resistance and high in self-lubricating performance. According to the method and equipment, provided by the invention, the coating process is simple; conditions for compositing the coatings are accurate and controllable; the film formation quality is high; the performance is stable; the product yield is high; and the cost is low. The coatings are ultra-hard and excellent in self-lubricating performance and the wear resistance. The equipment for the coatings is provided with four sets of large-scale coating units, is stable and reliable in production quality, can be applied to mass production, is convenient for lowering the manufacturing cost and achieves industrialization.

An outer ring and an inner ring of a rolling bearing are constituted of steel containing 0.77 to 0.85% of carbon, 0.01 to 0.25% of silicon, 0.01 to 0.35% of manganese, 0.01 to 0.15% of nickel, 3.75 to 4.25% of chromium, 4 to 4.5% of molybdenum and 0.9 to 1.1% of vanadium with the rest consisting of iron and impurities, a nitrogen-enriched layer having a nitrogen concentration of at least 0.05 mass % is formed on a region including a rolling surface, and the total of a carbon concentration and the nitrogen concentration in the nitrogen-enriched layer is at least 0.82 mass % and not more than 1.9 mass %. A DLC coating layer is arranged on a region including an outer ring contact surface.

The invention discloses a method for preparing a corrosion-resistant antifriction Cr-doped DLC (diamond-like carbon) coating. The method comprises the steps of placing a pretreated substrate on a rotating stand rod of arc and magnetron sputtering composite deposition equipment, taking a post arc Cr target as a Cr source and three pairs of flat targets C targets as C sources, and installing the three pairs of flat targets C on the inner wall of a furnace body in an opposite manner; adopting high-purity Ar as a main ionization gas to guarantee an effective glow discharge process; and adopting high-purity N2 as a reacting gas, ionizing the reacting gas and combining the reacting gas with Cr and C elements to deposit on the surface of the substrate so as to form the Cr-doped DLC coating. The prepared Cr-doped DLC coating has a smooth and compact surface, hardness of 20 GPa, binding force with the substrate of 80N, coating thickness of 2.0 micrometers, and excellent corrosion resistance and antifriction performance.

The invention discloses a diamond-like carbon film on the surface of an easy-to-rust metal piece and a preparation method of the diamond-like carbon film. The preparation method comprises the following steps: performing pretreatment on the surface of the metal piece at first, thereby removing pollutants on the surface of the metal piece; then, fixing the pretreated metal piece on a workpiece frame, and bombarding the surface of a to-be-cleaned sample with an iron source; preparing a transition layer of 0.1-0.5 micrometer; and preparing an a-C:HDLC layer of 1-3 micrometers. The preparation method provided by the invention is different from a conventional DLC coating preparation method, and has the advantages that the ionization rate of a hydrocarbon is improved, the substrate temperature is reasonably improved, and the diffusivity and mobility of adsorbing particles on the surface of the metal piece are improved, so that carbon ions can move towards grooves or pits and the dense film can be generated even if the surface of the metal piece is a brushed/sand-blasted non-smooth surface. The diamond-like carbon film, namely the coating obtained according to the preparation method, is still excellent in corrosion resistance and film substrate adhesion.

The invention discloses a corrosion and abrasion resistant Cr-DLC coating for an aluminum alloy surface and preparation methods of the Cr-DLC coating. The Cr-DLC coating comprises a Cr primer and a DLC coating, wherein the Cr primer is directly formed on the surface of an aluminum alloy substrate; and the DLC coating is directly formed on the Cr primer and doped with Cr. Among the preparation methods, one typical preparation method comprises the following steps that graphite and chromium are taken as cathode target materials, and the Cr-DLC coating is prepared on the aluminum alloy surface by use of a magnetron sputtering technology. The Cr-DLC coating has the advantages that the DLC coating doped with Cr is smooth in surface, compact in structure, high in rigidity, small in coefficient of friction, and resistant to both abrasion and corrosion; and meanwhile, the preparation process is simple, the repeatability and the reliability are high, and the cost is low.

In a method for coating at least part of the inner face of a piston ring, said ring preferably consisting of cast iron or steel, a PVD and/or DLC coating is applied by means of at least one of the following methods: PA-CVD, glow discharge and/or HIPIMS. A piston ring has a coating that is formed at least on part of the inner face of said ring, said coating being a PVD and/or DLC coating that preferably has been applied by means of PA-CVD, glow discharge and/or HIPIMS.

The invention discloses a method for in-situ synthesis of a composite TiC-DLC coating on the surface of titanium. The method comprises the following steps of placing a Ti target in a coating chamber and introducing a hydrocarbon gas, vacuumizing the film plating chamber and maintaining the temperature of the coating chamber, evaporating Ti ions out from the Ti target by virtue of arc ion plating, and ionizing the hydrocarbon gas by virtue of arc discharge to form the composite TiC-doped DLC coating on the Ti target. According to the method, by adopting the in-situ synthesis technology, the composite coating is formed by direction chemical reaction on the surface of the Ti target material, the uniformity of the composition of the composite coating and the binding force of the coating can be significantly improved and the method has the advantages of simple preparation process, low cost and high efficiency and has good application prospects in the preparation of the DLC coating.