Abstract: 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 Al2O3 ceramic, a thermosetting resin and a curing agent and are semi-thermosetting resin powders; and respectively spraying pure Al2O3 ceramic 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 Al2O3 ceramic 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.

Abstract: Provided are a high-performance composite coating and a preparation method and use thereof, which relates to the field of composite coating materials. The method includes steps: (1) ball milling a Cu powder, a Ti3AlC2 powder, an organic adhesive, a dispersant, and water to obtain a mixed slurry; (2) subjecting the mixed slurry obtained in step (1) to spray granulation to obtain granules, and sintering the granules to obtain a composite powder; and (3) spraying the composite powder obtained in step (2) onto a substrate material to obtain the high-performance composite coating.

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: 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 Al2O3 ceramic, a thermosetting resin and a curing agent and are semi-thermosetting resin powders; and respectively spraying pure Al2O3 ceramic 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 Al2O3 ceramic 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.

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: Embodiments of the present disclosure provide a flexible UHF RFID anti-metal tag including a tag chip, an antenna layer, a substrate layer and a metal base layer sequentially attached from top to bottom. The substrate layer includes a first and a second dielectric layer being sequentially attached from top to bottom. The first dielectric layer is attached to the antenna layer, and the second dielectric layer is attached to the metal base layer. A metal member to be labeled and the metal base layer jointly eliminate the interference of the metal on an equivalent circuit of the antenna. The substrate layer uses a polymer material as the first dielectric layer, and a support flexible material with the lower cost, such as the foam dielectric layer, is used as the second dielectric layer, which saves cost while ensuring sufficient flexibility of the substrate layer.

Abstract: Embodiments of the present disclosure provide a crack sensing tag including a dielectric substrate, a tag chip, an antenna and a metal patch. The tag chip and the antenna are respectively attached to an upper surface of the dielectric substrate, the tag chip is connected with the antenna, the metal patch is attached to a lower surface of the dielectric substrate, and the antenna is connected with the metal patch. The crack sensing tag may be removed without breaking its geometry after a monitoring cycle for the next surface crack monitoring, as the occurrence of cracks is monitored. The monitoring region is a coverage region of the crack sensing tag, which is complementary to a coupling tag, enabling the further enlarging of the crack sensing region to monitor the metal member to be tested in all dimensions. The crack sensing tag identifies crack depth variations up to millimeter accuracy.

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.

Abstract: Disclosed is an agglomerated TiN powder, the powder comprising spherical aggregates having particle diameters of 40 to 80 ?m and formed by the agglomeration of Ti and N having the atomic fractions of 72% and 28% respectively. Also provided is a TiN coating obtained using the powder. The three-strong-peak phase of the coating is a TiN phase, and also has partial TiO, TiO2, and Ti3O oxide phases; the coating has layered distribution of bright and dark phases, and the joint between the interior of the layered structure and the layer structure is provided with a small number of pores; the joint between the coating and a base has no microscopic defects such as cracks and is well jointed. The supersonic plasma-sprayed TiN coating achieves hardness as high as 1210HV0.1, thereby enhancing the wear resistance of the coating. The coating has good fracture toughness, thereby enhancing the fracture mechanical performance inside of the coating and extending the fatigue life of the coating.