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 discloses a pure water hydraulic through-shaft type spherical distribution axial plunger pump which comprises a housing, wherein a through shaft type structure is adopted, a drive main shaft is connected with a cylinder body through a spline, and the cylinder body is provided with odd plunger holes; a plunger ball head and a slipper ball socket in each plunger-slipper assembly form a slipper spherical hinge pair, and plungers are respectively arranged in the plunger holes of the cylinder body to form a plunger pair; one end of a spring arranged in a center hole of the cylinder body is used for pressing the cylinder body on a distribution plate through a blocking ring, the distribution plate is positioned on a rear end cover through the center hole and a positioning pin, and the end face of the cylinder body and the distribution plate form a distribution pair; and the other end of the spring is used for pressing a slipper in each plunger-slipper assembly on a tilting tray through a pressing rod and the like, the end face of the slipper and the surface of the tilting tray form a slipper pair, and the outer spherical surface of a spherical hinge and the inner ball socket surface of a return tray form a center spherical hinge pair. When the main shaft is driven to rotate, the pure water hydraulic through-shaft type spherical distribution axial plunger pump can ensure that the plungers reciprocate along the plunger holes of the cylinder body and realize suction and discharge processes of sea water through the action of the distribution plate.

The invention provides a polyether-ether-ketone/nanometer zinc oxide/carbon fiber wear-resistant composite material and a preparation method thereof, and application of the composite material to mechanical polishing of retaining rings, belonging to the technical field of polymer-based composite materials. The composite material is composed of, by mass, 75 to 90% of polyether-ether-ketone resin, 5 to 20% of carbon fibers coated by polyethersulfone and 2.5 to 7.5% of nanometer zinc oxide modified by a coupling agent, summing to 100%. To improve dispersibility of zinc oxide nanoparticles and reduce the agglomeration degree of the zinc oxide nanoparticles, the coupling agent is employed for surface modification of the zinc oxide nanoparticles; and polyethersulfone is used for physical coating of the surfaces of the carbon fibers so as to improve compatibility between the carbon fibers and polyether-ether-ketone. Compared with a polyether-ether-ketone composite material without any treatment, the wear-resistant composite material provided by the invention has more excellent strength, wear resistance and antifriction performance, is low in processing cost and is applicable to mechanical polishing of retaining rings.

The invention belongs to the metallurgy material domain, specially involves uses in to make east the hydraulic pump to seal contains a nanometer pellet which the static link uses the copper alloy compound material. The compound material chemical composition ingredient (weight %) is: The graphite 1-5%, the particle size for is smaller than 70 microns; Nanometer nickel 1-5%, average grain diameter 40-60nm; The aluminum oxide 1-5%, average grain diameter 140-160nm, in which is smaller than 100nm to occupy 15-17%; The remainder is 6-6-3 copper alloy, the particle size for is smaller than 70 microns. The invention and the existing technology compare has the machinery mildly high, the wear-resisting anti-friction nature good, the seal effect is good, life long merit. Moves with this invention material manufacture hydraulic pressure pump spindle tail seals the static link, the acceleration length-of-life test 130 hours, its average spillage for is not bigger than 0.0076ml/h, after the test run decomposes pumps the inspection, the static link packing surface not visual obviously wears, with soaks the copper graphite material compared to, enhances in a time of situation in the practical work ability, the average spillage reduces nearly 20 times.

The invention relates to a method for preparing a patterned functional film based on a template deposition, and aims to solve the technical problem that degradation efficiency and light absorbance utilization efficiency are relatively poor as a film prepared by existing similar methods is relatively difficult to realize stored oil lubrication in surface pits, is relatively poor in wear resistanceand anti-friction quality, is relatively small in specific surface area and is relatively difficult to realize selective absorption and reflection of visible light. The key point is that the method comprises the following steps of: preparing a surface nano structure with a nano tube array structure on metal surfaces such as a titanium surface and an aluminum surface through an anode oxidization technology; removing the surface nano tube structure through a chemical or mechanical method, and leaving a patterned template structure on a metal matrix surface; and conducting depositing on a metal patterned surface through a physical gas-phase deposition technology to prepare a functional film. The functional film deposited by the method has a patterned morphology, can improve binding force between the film and matrix, can increase a specific surface area of the film, and is beneficial for bringing functional effects such as photocatalysis of the film into play.

The invention discloses a polytetrafluoroethylene-reinforced adhesion ceramic coating material. The polytetrafluoroethylene-reinforced adhesion ceramic coating material includes the following components: by weight, 57.4-58.4% of micron alumina, 0.5-1.5% of nano zinc oxide, 0.4-0.8% of nickel powder, 0.2-1% of polytetrafluoroethylene and 30-50% of aluminum dihydrogen phosphate. The invention also provides an adhesion ceramic coating prepared from the ceramic coating material and a preparation method of the adhesion ceramic coating. The polytetrafluoroethylene-reinforced adhesion ceramic coatingis prepared by using a sol-gel method, the preparation process is simple, no complicated-structure and precise coating equipment is needed, and the cost is low.

The invention discloses a powder metallurgy circular spline which adopts less machining/free-of-machining, can be self-lubricated in the working process and is used for a harmonic reducer, and a preparation method of the powder metallurgy circular spline. The preparation method adopts a powder metallurgy method and comprises the procedures of preparation of powder with high composition uniformity,pressing, sintering, aftertreatment and the like. The powder metallurgy circular spline prepared from the preparation method has the advantages of being uniform in composition, good in abrasion resistance and anti-friction property, low in noise, long in life, less in machining/free of machining, low in cost and the like, and can replace a circular spline currently machined and prepared from materials such as steel and cast iron.

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 discloses an environment-friendly flame-retardant straw board for a building. The environment-friendly flame-retardant straw board comprises the following components in parts by weight:20-35 parts of straw; 10-16 parts of nano WEP high-fiber resin powder; 5-12 parts of carbon fiber resin composite material powder; 8-14 parts of sisal hemp; 6-10 parts of flame-retardant fibers; 3-5 parts of an environment-friendly bactericide; 2-3 parts of an adhesive; 1-2 parts of a waterproof agent; and 1-3 parts of a flame-retardant agent, wherein the carbon fiber resin composite material powder comprises the following components in parts by weight: 35-40 parts of carbon fibers, 12-20 parts of epoxy resin, 20-32 parts of phenolic resin, and 6-13 parts of polytetrafluoroethylene, the environment-friendly bactericide is nano-silver, and the flame-retardant fibers are polybenzimidazole fibers. According to the invention, waste materials are reasonably utilized to prepare the board throughsimple processing procedures, so that not only are the resources saved and the cost reduced, but also the board has good glossiness and certain air purification capacity, and the board has the advantages of higher flame retardancy, high fatigue strength, high impact toughness, water resistance and antibacterial property, thereby prolonging the service life of the board.

The invention relates to the technical field of metal surface materials, in particular to an MXene reinforced silicate adhesive ceramic coating and a preparation method thereof. The MXene reinforced silicate adhesive ceramic coating is prepared from aluminum oxide, silicon phosphate, MXene and a silicate adhesive; the chemical formula of the MXene is Ti3C2. The coating disclosed by the invention has relatively low shear strength and self-lubricating capacity, relatively high mechanical strength and a layer-by-layer stacked structure; the preparation process is relatively simple, the curing temperature is relatively low, the time is relatively short, and is very suitable for industrial production equipment and places which are not resistant to high temperature; the preparation process is low in energy consumption, does not need precise coating equipment with a complex structure, and is green and pollution-free.