Wuhan Research Institute of Materials Protection

Material Laboratory of State Grid Corporation of China (shandong)

Dan Jia

Tian Yang

Shengpeng Zhan

Haitao Duan

Jiesong Tu

Yinhua Li

Jian Li

Lixin Ma

Wulin Zhang

Yijie Jin

Zhibin Fan

Changxin Wan

Xingeng Li

Lijun Zong

Linlin Duan

Yongliang Jin

Yunhu Ding

Meng Yi

Jianwei Qi

Xiaoming Wang

This invention provides a preparation method of solid self-lubricating material with high temperature resistance, including steps described as follows: first, mixing polymer matrix resin and nano lubricating filler to compose a uniform raw material powders; then, placing the raw material powders in the cavity of hot-press die; keeping the temperature for 90-120 min at the first prepressing temperature, controlling the hot-pressing pressure under the third pre-loading pressure, and gradually increasing the temperature to the solid-phase molding temperature of the material; gradually reducing the temperature to the first preloading temperature after the solid-phase molding is completed; next, removing the pressure, finally, obtaining the solid self-lubricating material by naturally cooling to normal temperature and demoulding. This invention adjusts the hot-pressing molding temperature according to the drift value of glass transition temperature, in order to avoid the degradation of tribological properties and mechanical properties caused by uneven plasticization and overheating of composite materials during the compression molding process.

Preparation method of solid self-lubricating material with high temperature resistance

A titanium dioxide micro-nanocontainers, corrosion-resistant waterborne epoxy coatings and preparation method thereof, including preparation steps as follows: TiOmicro-nano spheres are synthesized by applying hydrothermal method; a polyaniline layer doped with molybdate ions is deposited on the surface of TiOmicro-nano spheres by adopting the method of in-situ chemical polymerization, TiO/PANI-MoOmicro-nano-spheres are obtained, then, polydopamine is encapsulated on the surface of TiO/PANI-MoOmicro-nano spheres to obtain titanium dioxide micro-nanocontainers; next, antirust filler, defoamer, dispersant and thickener are added into waterborne epoxy emulsion, then titanium dioxide micro-nanocontainers are added in the waterborne epoxy emulsion for dispersing and grinding, filtering and encapsulating to obtain component A; the waterborne epoxy curing agent and deionized water are mixed in proportion to obtain component B; component A is stirred, then it is mixed with the component B in proportion, corrosion-resistant waterborne epoxy coatings is obtained. According to the invention, the titanium dioxide micro-nanocontainers is synthesized and added into the coating as an additive, which can not only improve the compatibility between the filler and the emulsion, but greatly improves the long-term corrosion resistance of the coating by prolonging the release time of the corrosion inhibitors.

Titanium dioxide micro-nanocontainers, corrosion-resistant waterborne epoxy coating and preparation method thereof

A method for preparing an aluminum carbon composite by using a foam aluminum includes the following steps. Electromagnetic stirring and drying are performed on the foam aluminum and a carbon material to obtain a foam aluminum preform; an aluminum block is melted into aluminum liquid, the aluminum liquid is adjusted to qualified aluminum liquid, the qualified aluminum liquid is cooled to a temperature of 620˜650° C. and keeping the temperature to make the qualified liquid aluminum become a semi-solid state, then the foam aluminum preform is pressed into the qualified liquid aluminum and performing electromagnetic stirring. A mold is heated to a certain temperature and extrusion molding is performed to obtain a carbon reinforced aluminum matrix composite material. The method overcomes a problem that the carbon material and the aluminum matrix have poor wettability and are not easy to be added into the aluminum matrix.

Method for preparing aluminum carbon composite by using foam aluminum

A graphene reinforced aluminum matrix composite with high electrical conductivity and a preparation method thereof. The method includes: obtaining aluminum coated graphene powder by plating aluminum on a graphene surface, melting aluminum block into aluminum liquid, heating a mold to be lower than an aluminum melting point, alternately pouring the aluminum liquid and the aluminum coated graphene powder into the mold for layered casting to obtain a sandwich structure; extruding the sandwich structure into a rectangular test block and then heating to 500&#x2dc;600&#xb0; C., performing heat preservation for a preset time and performing forging treatment, and performing longitudinal cold deformation under inert gas to obtain the graphene reinforced aluminum matrix composite. The method can solve a problem that poor wettability of graphene and aluminum matrix, the graphene is evenly dispersed in the aluminum matrix, which can improve strength of the aluminum matrix and keep its high electrical conductivity.

Graphene reinforced aluminum matrix composite with high electrical conductivity and preparation method thereof

A method for improving lubricating performance of lubricating oils is provided and includes: adding copper phosphate with a porous structure into a base oil, a mass percent of the copper phosphate with the porous structure to the base oil is 0.0001% &#x2dc;50%, the porous structure is one of a foam porous structure and a porous nanoflower structure. The copper phosphate with the porous structure is obtained by adding a divalent copper salt solution into an alkaline disodium hydrogen phosphate solution or alkaline phosphoric acid buffer solution and then separating a precipitate. When a ratio of a concentration of a divalent copper ion to that of a phosphate ion is 1:0.1 to 400, the porous structure is porous foam or nanoflower. The porous structure can be well dispersed in the lubricating oil for 1 hour. After adding the lubricating oil, excellent friction reduction and anti-wear is achieved.

Method for improving lubricating performance of lubricating oils

Disclosed is a friction-reducing and anti-wear composite material for a wading kinematic pair and a method of preparing the same. The friction-reducing and anti-wear composite material is prepared from carbon fiber (CF) among inorganic fillers, polyimide (PI) and polyether ether ketone (PEEK). These three materials are wet-mixed, dried and placed in a mold followed by curing by a heat press. The cured product is cooled and demolded to obtain the CF/PI/PEEK friction-reducing and anti-wear composite material for a wading kinematic pair. Tribological properties of the PEEK material are enhanced due to synergistic effect arising from hybrid organic-inorganic filling. The friction-reducing and anti-wear composite material provided in the invention has significantly reduced friction coefficient and wear volume loss under the seawater environment.

Friction-reducing and anti-wear composite material for wading kinematic pair and preparation method therefor

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Hubei, China

Dan Jia