Abstract: 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.

Abstract: 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 BaTiO3—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.

Abstract: 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 BaTiO3—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.

Abstract: A method and a structure for improving adhesion strength of a coating are provided. The method includes: step 1), preparing textured patterns, where at least one type of pattern is textured on a surface of a substrate using a laser process based on bionics; step 2), regulating a parameter, where a spraying process parameter is regulated based on a parameter of the textured patterns; and step 3), spraying a coating, where spraying is performed on the substrate obtained in step 1) using a supersonic plasma spraying method.