Method of preparing ceramic coating by flame heat spray painting thermit packaged silicon carbide particles
A technology of wrapping silicon carbide and ceramic coatings, which is applied in the field of preparation of thermite-wrapped silicon carbide particle ceramic coatings, can solve problems such as limitations and achieve the effect of preventing thermal sublimation
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Embodiment 1
[0009] Example 1: First, compound ferric oxide powder of 400-800 mesh with aluminum powder of 400-800 mesh to form a thermite; then combine the thermite with alumina particles of 400-800 mesh and silicon carbide of 400-800 mesh According to the mass ratio of 1:0.5:2.0, the polymer binder with a degree of polymerization of 1000-5000 is recombined and reconstructed, and the particle size is 160-400 mesh. The inner layer is silicon carbide, the middle layer is thermite, and the outer layer is alumina. Spherical composite particles with a three-layer wrapping structure; finally, put the spherical composite particles into a powder hopper of a spray gun for thermal spraying by an oxygen-acetylene flame to form a ceramic coating.
Embodiment 2
[0010] Example 2: First, compound ferric oxide powder of 400-800 mesh with aluminum powder of 400-800 mesh to form a thermite; then combine the thermite with alumina particles of 400-800 mesh and silicon carbide of 400-800 mesh According to the mass ratio of 1:1.0:0.5, it is restructured by polymer binder with a degree of polymerization of 1000-5000, and the particle size is 160-400 mesh. The inner layer is silicon carbide, the middle layer is thermite, and the outer layer is alumina. Spherical composite particles with a three-layer wrapping structure; finally, put the spherical composite particles into a powder hopper of a spray gun for thermal spraying by an oxygen-acetylene flame to form a ceramic coating.
Embodiment 3
[0011] Example 3: First, compound ferric oxide powder of 400-800 mesh with aluminum powder of 400-800 mesh to form a thermite; then combine the thermite with alumina particles of 400-800 mesh and silicon carbide of 400-800 mesh According to the mass ratio of 1:0.1:1.5, it is restructured by polymer binder with a degree of polymerization of 1000-5000, and the particle size is 160-400 mesh. The inner layer is silicon carbide, the middle layer is thermite, and the outer layer is alumina. Spherical composite particles with a three-layer wrapping structure; finally, put the spherical composite particles into a powder hopper of a spray gun for thermal spraying by an oxygen-acetylene flame to form a ceramic coating.
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