Army Academy of Armored Forces

Academy of Armored Forces Engineering

Lihong Dong

Haidou Wang

Zhiguo Xing

Guozheng Ma

Ming Liu

Yanfei Huang

Xinyuan Zhou

Yuelan Di

Weiling Guo

Congshuo Zhao

Qiqing Peng

Dongyu He

A small-size axial powder feeding inner hole plasma spraying gun comprises a nozzle with one end fixed on one side of a front gun body through a nozzle gland and the other end extending to the other side of the front gun body; an insulator arranged between the front gun body and a rear gun body; a powder feeding frame fixedly connected to the rear gun body internally provided with a powder inlet channel, a cathode seat of a cathode being connected to the powder feeding joint, a cathode head extending into a spray hole channel of the nozzle, and an annular cavity being formed between the cathode head and an inner wall of the spray hole channel; an air inlet channel arranged on the front gun body and communicated with the annular cavity; and a cooling channel with an interior introduced with cooling water.

Small-size axial powder feeding inner hole plasma spraying gun

The disclosure discloses a preparation method of a composite coating for a resin matrix composite, comprising the following steps: preparing ceramic-resin composite powders which comprise AlOceramic, a thermosetting resin and a curing agent and are semi-thermosetting resin powders; and respectively spraying pure AlOceramic powders and the composite powders on the surface of the resin matrix composite by supersonic atmospheric plasma spraying to form a ceramic-resin composite coating, wherein the pure AlOceramic powders are fed into jet flow in a manner of feeding powder inside a spray gun, and the composite powders are fed into jet flow in a manner of feeding powder outside the spray gun. Correspondingly, the disclosure also provides a preparation device of a composite coating for a resin matrix composite.

Preparation method and device of composite coating for resin matrix composite

Provided is a nickel-based composite coating, method for producing the same and use thereof. A powder mixture is coated on the surface of a substrate to obtain a nickel-based composite coating, wherein the powder mixture comprises nickel-chromium-boron-silicon powders and barium titanate powders. The barium titanate powders are added to the nickel-based powders as a second phase to form BaTiO&#x2014;NiCrBSi metal-based ceramic composite coating. The nickel-based barium titanate composite coating has an excellent damping shock absorbing performance and gives the substrate strength as well. Comparing with the conventional coating materials, the coating obtained by the present disclosure through plasma cladding technique not only bonds with the substrate in a metallurgic way, but also has a small heat affected zone, specifically, an excellent damping shock absorbing performance. In embodiments of the present disclosure, vibration and noise generated by the cylinder head is reduced 20% by using the shock absorbing cladding coating.

Nickel-based coating composition for improving damping shock absorbing performance of cylinder head of diesel engine, method for producing the same and use thereof

Growing community of inventors

Beijing, China

Lihong Dong