36results about How to "Good wear resistance and antifriction performance" patented technology

The invention belongs to the field of high polymer composites and particularly relates to a nanoparticle / graphene oxide composite modified high polymer material and a preparation method thereof. The composite is prepared from nanoparticle / graphene oxide composite particles and a macromolecular polymer matrix, wherein the nanoparticle / graphene oxide composite particles are synthesized with an electrostatic self-assembly method, that is, an amino modified nanoparticle dispersion liquid is ionized to have positive charges while graphene oxide contains a large quantity of carboxyls and hydroxyls and is ionized to have negative charges, particles with positive and negative charges are sufficiently contacted, and electrostatically self-assembled nanoparticle and graphene oxide composite particles are obtained. The prepared nanoparticle / graphene oxide composite modified high polymer material has excellent mechanical and tribological performance, is simple and efficient to prepare and has goodapplication prospects in automobiles, aerospace, electronic and electrical engineering, machinery, weapons and other fields.

The invention provides a method for preparing a nickel phosphorus / expanded graphite-polyester resin / polytetrafluoroethylene composite material. The method comprises the following steps: firstly, preparing expanded graphite of which the surface is coated by a chemical nickel phosphorus cladding layer, secondly, filling a foamed nickel support with the expanded graphite, preparing an unsaturated polyester resin / polytetrafluoroethylene mixed solution, sufficiently filling pores of foamed nickel filled with the expanded graphite with the unsaturated polyester resin / polytetrafluoroethylene mixed solution, and finally conducting room-temperature polymerization and later polishing and grinding, so as to obtain the nickel phosphorus / expanded graphite-polyester resin / polytetrafluoroethylene composite material. In the preparation process of the nickel phosphorus / expanded graphite-polyester resin / polytetrafluoroethylene composite material, sufficient contact of the polyester resin and the expanded graphite of which the surface is coated by the nickel phosphorus cladding layer with polytetrafluoroethylene is ensured, so aggregation of the polytetrafluoroethylene and the expanded graphite is effectively avoided, furthermore, the wearing resistance of the polytetrafluoroethylene is greatly improved, the prepared composite material is small in friction coefficient, high in hardness, high in pressure resistance and good in wearing resistance, and has wide application prospects under high-frequency friction working conditions.

A pulse electrodeposited Ni-Co-P / HBN composite coating and a preparation method thereof, which uses a metal material as a substrate, first pre-treats the surface of the substrate, and then mixes it with nickel sulfate, cobalt chloride, sodium hypophosphite, and citric acid , trisodium citrate, boric acid, and polyvinyl alcohol as the main components, and hexagonal boron nitride HBN powder as the dispersed phase of the composite plating solution. The HBN particles are surface-modified and dispersed with surfactants and ultrasonic vibrations. Through reasonable settings Pulse electrodeposition parameters, fully stirred to make HBN particles evenly dispersed in the plating solution, HBN particles and matrix metal nickel-cobalt-phosphorus co-deposition and heat treatment under the state of applying pulse current to obtain corrosion-resistant, wear-resistant and anti-friction pulse electrodeposited Ni- Co-P / HBN composite coating; it overcomes the shortcomings of existing composite coatings such as relatively single components, coarse coating grains, low interface bonding strength with the substrate, and unsatisfactory comprehensive performance of corrosion resistance, wear resistance and friction reduction; it is suitable for use as Wear-resistant and anti-friction and corrosion-resistant surface coatings for frictional motion parts in machinery, metallurgy, and chemical industries.

The invention belongs to the technical field of self-lubricating materials, and relates to a preparation method of a molybdenum disulfide-nickel phosphorus-polytetrafluoroethylene composite material,and the method comprises the following steps: S1, performing plasma treatment on polytetrafluoroethylene powder, and after irradiation for 60-120 seconds, putting the polytetrafluoroethylene powder for standing for 15-30 minutes in air; S2, performing sensitization and activation treatment on the polytetrafluoroethylene powder, to be more specific, after wetting of the polytetrafluoroethylene powder treated by plasma with absolute ethanol, respectively performing sensitization and activation on the polytetrafluoroethylene powder; S3, preparing a nickel phosphorus-polytetrafluoroethylene composite and performing amination treatment, to be more specific, a chemical nickel phosphorus-plating solution is prepared for plating the sensitized and activated polytetrafluoroethylene powder to obtainnickel phosphorus-polytetrafluoroethylene composite powder, and the obtained nickel phosphorus-polytetrafluoroethylene composite powder is aminated; and S4, preparing the molybdenum disulfide-nickelphosphorus-polytetrafluoroethylene composite material, to be more specific, first, molybdenum disulfide-nickel phosphorus-polytetrafluoroethylene composite material powder is prepared, and the molybdenum disulfide-nickel phosphorus-polytetrafluoroethylene composite material powder is molded to obtain the wear resistant and antifriction molybdenum disulfide-nickel phosphorus-polytetrafluoroethylenecomposite material.

The invention belongs to the technical field of self-lubricating materials, and relates to a preparation method of a molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material, and the method comprises the following steps: S1, performing plasma treatment on polytetrafluoroethylene powder, and after irradiation for 60-120 seconds, putting the polytetrafluoroethylene powder for standing for 15-30 minutes in air; S2, performing pretreatment on graphite powder, S3, performing sensitization and activation treatment on the polytetrafluoroethylene powder, to be more specific, after wetting of the polytetrafluoroethylene powder treated by plasma with absolute ethanol, respectively performing sensitization and activation on the polytetrafluoroethylene powder; S4, preparing graphite-nickel phosphorus-polytetrafluoroethylene composite powder, S5, preparing graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material powder, and S6, preparing the molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material, to be more specific, first, molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material powder is prepared, and the molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material powder is molded to obtain the wear resistant andantifriction molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material.

The invention relates to a wear-resistant delta-TaN film, and a preparation method and application thereof, and belongs to the technical field of wear-resistant material design and preparation. A texture coefficient I(200) / [I(200) + I(111)] of the delta-TaN film is 0.2 to 0.8; the crystal structure of the film is delta-TaN of an NaCl crystal form. In the film, an atomic ratio of Ta / N is about 0.72 to 1.33. The preparation method comprises the following steps: using radio frequency reactive magnetron sputtering, using nitrogen and argon as working gases, using a tantalum target as a tantalumsource, and fixing a flow ratio of nitrogen and argon; adjusting a grain texture coefficient of the film by changing working pressure and / or tantalum target power. The application of the resulting filmincludes use as a cutting device, a diffusion impervious layer for electronic packaging, and the like. The invention opens up a new method for controlling the grain texture coefficient of the film; an obtained product is excellent in performance and is convenient for high-precision and large-scale generation and application.

The invention relates to an electro-deposition composite plating method of oil-sleeve collar-joint screw-threads and a plating solution thereof. The method includes the following steps: a composite plating solution comprises surfactant mixed solution and alkalescence plating solution with the usage ratio of 10g to 60g:1L, wherein the surfactant mixed solution comprises fatty alcohol-polyxyethylene ether and polytetrafluoroethylene latex with the weight ratio of 1: 20 to 1: 50. Self-lubricating composite plating obtained on the screw surface of the nickel-base alloy oil-sleeve collar-joint by the method and the plating solution of the invention has good wear resistance and antifriction performance and can improve the pick resistance of the oil-sleeve collar-joint.