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67results about How to "Smooth coating surface" patented technology

Self-lubricating wear-resistant compound coating on surfaces of titanium and titanium alloy and preparation method thereof

The invention discloses a self-lubricating wear-resistant compound coating on surfaces of titanium and titanium alloy and a preparation method thereof. The compound coating comprises a surface of a titanium and titanium alloy substrate, an oxidized ceramic coating and a self-lubricating coating which are successively connected. The titanium and titanium alloy substrate has a textured surface pre-treated by a Nd:YAG pulse laser puncher, the oxidized ceramic coating is a hard oxidized ceramic coating generated by means of plasma electrolytic oxidation, and the self-lubricating coating is an ultra high molecular weight polyethylene coating doped with graphene. By adding graphene into the ultra high molecular weight polyethylene coating to form a laminar compound structure, the surface wettability of the coating is improved, the frictional coefficient and the wear rate of the coating are reduced, and the frictional property of the surface of the coating is improved. According to the invention, the wear-resistant compound coating which is high in hardness and low in frictional coefficient and the wear rate can be prepared on the surface of the titanium and titanium alloy, and the coating is level, smooth and compact in surface and has good wear-resistant and corrosion-resistant properties.
Owner:NANJING UNIV OF SCI & TECH

Surface metallization method for foamed plastic by adopting high-power pulse magnetron sputtering

The invention relates to a surface metallization method for foamed plastic by adopting high-power pulse magnetron sputtering and belongs to the technical field of material surface engineering. The surface metallization method for the foamed plastic by adopting high-power pulse magnetron sputtering comprises the following steps of: firstly carrying out pre-treatment of surface sealing, cleaning, drying and distressing on the surface of foamed plastic, then loading samples, vacuumizing, and degassing; carrying out pre-sputtering to clean a foamed plastic workpiece and sputtering a target material; depositing a metal coating by adopting high-power pulse magnetron sputtering, wherein a metal coating with high ionization rate is deposited on the surface of the foamed plastic workpiece at a low temperature by controlling pulse configuration, frequency, charging voltage and sputtering/cooling time, and a metal coating with smooth surface, compact structure and high cohesion between film and substrate material is prepared; and finally cooling, taking away the foamed plastic workpiece, and inspecting properties of the metallized foamed plastic such as surface appearance, hardness and cohesion between film and substrate material. The surface metallization method for the foamed plastic by adopting high-power pulse magnetron sputtering has the advantages that the surface metallization method is applicable to various metallized coatings; the coating is smooth and compact in surface and high in cohesion between film and substrate material; the sputtering temperature and the deposition temperature are low, and a foamed plastic substrate can not deform; and the surface metallization method is safe and environment-friendly, and no chromic acid reagent which contains Cr<6+> and is related in a chemical plating process is used.
Owner:DALIAN UNIV OF TECH

Novel wear-resistant and corrosion-resistant chemical centrifugal pump

The invention discloses a novel wear-resistant and corrosion-resistant chemical centrifugal pump which is applied to transport corrosive liquid containing solid particles and other fiber media in papermaking, chemical engineering, food, environmental engineering and other industries. A pump shaft is fixedly arranged on a bearing box of a suspension; two ends of the bearing box are respectively provided with a front gland and an end cover fixedly; a mechanical seal is arranged between a pump cover and the pump shaft; an impeller is fixedly arranged on one end of the pump shaft; the pump body is fixedly arranged on the suspension; a front lining board is arranged between the pump body and the impeller; a rear lining board is arranged between the pump cover and the impeller; a hard alloy layer is respectively sprayed on each of the front lining board and the rear lining board which are made of corrosion-resistant and wear-resistant materials, so that the wear-resistant performance of the front lining board and the rear lining board are further improved; and meanwhile, the surfaces of the coatings are smoother, so that the friction force and resistance of a flow through object are reduced, serous fluid can pass quickly, the use power of a water pump is reduced, the use efficiency is improved and the energy-saving effect is significant.
Owner:JIANGSU XINYUE PUMP IND MFG

Hydrogenation catalyst using cellular titanium dioxide as carrier and preparation method thereof

The invention discloses a hydrogenation catalyst using a cellular titanium dioxide as a carrier and a preparation method thereof. The catalyst is characterized by comprising cellular titanium dioxide carrier, TiO2-C composite coating and precious metal Pd. The TiO2-C composite coating has a thickness of 1-100 mum, a load of 1-10% of the weight of the cellular titanium dioxide carrier and an abscission rate no more than 3%. The precious metal Pd has a load of 0.1-1% of the weight of the cellular titanium dioxide carrier and a load depth of 1-100 muM. Compared with a prior art, the invention has the following advantages: first, the TiO2-C composite coating has high adhesion rate with cellular titanium dioxide carrier, and has smooth coating surface, no crack and low coating abscission rate; second, immersion depth of the precious metal Pd can be effectively regulated by controlling the thickness of the TiO2-C composite coating; and third, the catalyst has the advantages of simple preparation technology, good hydrogenation performance and suitability for industrialized production. The hydrogenation catalyst of the invention is suitable to be used as a hydrogenation catalyst for aromatic aldehydes like crude terephthalic acid or p-carboxy benzaldehyde.
Owner:CHINA PETROLEUM & CHEM CORP +1

Modified diamond particles, modification method and application as reinforced phase and obtained metal-based composite material

The invention discloses modified diamond particles, a modification method and an application as reinforced phase and an obtained metal-based composite material and belongs to the field of composite materials. The modification method of the modified diamond particles adopts vacuum rolling coating equipment and the particles are stirred in a roller, so that the coating uniformity of the diamond particles is improved. By adopting a multi-arc ion coating process, plasmas are generated on the surface of a target material directly, so that energy of particles attached to a matrix is high, the coating compactness is high, and a carbide is formed more easily by a metal and the diamonds, and therefore, mechanical bonding is converted into metallurgical bonding, and the interface heat resistance canbe reduced greatly. By carrying out coating by means of a magnetron sputtering method, the surface of the multi-arc ion coating is improved, so that the surface is leveler, the flowability of the diamond particles is increased, the hot press molding ability is improved and formation of pores is reduced. On the other hand, the multi-arc ion coating metal is prevented from being diffused to a matrix metal, so that the heat conducting property of the matrix is reduced. According to the modified diamond particles, a coating is compact and is unlikely to fall off.
Owner:苏州博志金钻科技有限责任公司

Method for preparing main chain scission-type polysilyl (METH)acrylate resin and application thereof

A method for preparing a main chain scission-type polysilyl (meth)acrylate resin and application thereof. The method comprises: a cyclic monomer, vinyl monomer and vinyl silyl ester monomer are mixed in a solvent at a formulation ratio, then added a composite initiator in a mass percentage of 0.01-5% based on the total amount of the monomers, and reacted at a temperature of 25-150° C., and under the protection of argon or nitrogen gas, so as to prepare the main chain scission-type polysilyl (meth)acrylate resin, wherein the monomers are consisted of 5-95% by mass of cyclic monomer, 0-90% by mass of vinyl monomer and 5-95% by mass of vinyl silyl ester monomer. The resulting resin can not only be hydrolyzed on the side chain silyl ester segment under the effect of the sea water, but also occur chain scission on the main chain polyester segment under the effect of the seawater, so as to solve the dependency of the traditional self-polishing material on the sailing speed, effectively control the release of the antifouling agent at a constant rate, ensure the active substance preserved on the coating surface of the ships, and properly meet the antifouling requirements on the low sailing speed ships, submarines and off-shore oil platform facilities.
Owner:SOUTH CHINA UNIV OF TECH
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