LaSi2-doped modified ZrB2-SiC composite powder and preparation method thereof as well as thermal protection coating and preparation method thereof

The invention provides LaSi2-doped modified ZrB2-SiC composite powder, a preparation method of the LaSi2-doped modified ZrB2-SiC composite powder, a thermal protection coating and a preparation method of the thermal protection coating, and relates to the technical field of coating preparation. The preparation method comprises the following steps: mixing raw material powder with a binder and water, and carrying out ball milling to obtain ball-milled slurry; the raw material powder comprises LaSi2 powder, ZrB2 powder and SiC powder; the mass ratio of the ZrB2 powder to the SiC powder is (4-8): 1; the content of the LaSi2 powder in the raw material powder is 5-15 wt%; carrying out spray drying on the ball-milled slurry to obtain agglomerated powder; and the agglomerated powder is subjected to induction plasma spheroidizing treatment, and the modified ZrB2-SiC composite powder doped with LaSi2 is obtained. The ZrB2-SiC composite powder is subjected to doping modification by using LaSi2, and ...

Gel sheet and method for producing the same, aerogel compounded material and method for producing the same, device for controlling the thickness of the gel compounded material, and machine for manufacturing the gel compounded material

Antioxidant composite film layer as well as preparation method and application thereof

The invention provides an anti-oxidation composite film layer and a preparation method and application thereof, and belongs to the technical field of composite materials. The invention provides an anti-oxidation composite film layer which comprises a base body layer, a SiC thin film middle transition layer and an outer-layer-oxidation-resistant coating layer which are sequentially stacked, and a microstructure is arranged on the surface of the side, making contact with the outer-layer-oxidation-resistant coating layer, of the SiC thin film middle transition layer. The microstructure is formed on the intermediate transition layer of the SiC thin film, the surface area of the intermediate transition layer of the SiC thin film is increased by more than three times through the microstructure, the interface bonding area can be increased, the Van der Waals force acting area is increased, the bonding force is improved, the microstructure is filled with the formed outer layer oxidation resistant ...

Method for preparing protective coating on surface of ceramic-based composite material

The invention belongs to the technical field of ceramic material protection, and provides a method for preparing a protective coating on the surface of a ceramic-based composite material. The gradient film layer is firstly deposited on the ceramic-based composite material, so that the problems that the thermal expansion coefficient of the protective coating is not matched with that of the ceramic-based composite material and the binding force is poor are better solved; in addition, SiC in the gradient film layer has excellent high-temperature thermal conductivity. Then, the microstructure is etched on the gradient film layer, so that the surface area of the gradient film layer is greatly increased, the Van der Waals force acting area is increased, and the binding force between the substrate and the protective coating is further improved; in addition, the microstructure can release stress in the etching preparation process, so that the probability of generating microcracks of the matrix ...