Method for improving oxidation resistance of surface coating layer of carbon/carbon composite material
A carbon composite material and anti-oxidation performance technology, which is applied in the field of carbon/carbon composite material preparation, can solve the problems of many defects, poor bonding force, shallow Si penetration, etc., to improve interface bonding, alleviate thermal expansion mismatch, and avoid peeling or shedding effect
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Embodiment 1
[0026] The carbon / carbon composites were polished and polished sequentially with No. 400, No. 800 and No. 1000 sandpaper respectively, washed with absolute ethanol, and dried in an oven at 100°C. The above-mentioned carbon / carbon composite material sample was placed in a resistance furnace for micro-oxidation at 800°C for 20 minutes.
[0027] Weigh 70g of Si powder, 7g of C powder, 10g of SiC powder, 13g of Al 2 o 3 pink. Place in a turpentine ball mill jar, put agate balls of different numbers and diameters into the ball mill jar, and perform ball milling and mixing treatment on a planetary ball mill for 1 hour, and use it as an embedding material for later use. The purity of Si powder is 99.5%, particle size is 300 mesh, the purity of C powder is 99%, particle size is 320 mesh, SiC powder is analytically pure, particle size is 300 mesh, Al 2 o 3 The purity of the powder is analytically pure, and the particle size is 300 mesh.
[0028] Put half of the above-mentioned emb...
Embodiment 2
[0031] The carbon / carbon composites were polished and polished sequentially with No. 400, No. 800 and No. 1000 sandpaper respectively, washed with absolute ethanol, and dried in an oven at 100°C. The above-mentioned carbon / carbon composite material samples were placed in a resistance furnace at 900°C for micro-oxidation for 10 minutes.
[0032] Weigh 70g of Si powder, 7g of C powder, 10g of SiC powder, 13g of Al 2 o 3 pink. Place in a turpentine ball mill jar, put agate balls of different numbers and diameters into the ball mill jar, and perform ball milling and mixing treatment on a planetary ball mill for 1 hour, and use it as an embedding material for later use. The purity of Si powder is 99.5%, particle size is 300 mesh, the purity of C powder is 99%, particle size is 320 mesh, SiC powder is analytically pure, particle size is 300 mesh, Al 2 o 3 The purity of the powder is analytically pure, and the particle size is 300 mesh.
[0033] Put half of the above-mentioned e...
Embodiment 3
[0036] The carbon / carbon composites were polished and polished sequentially with No. 400, No. 800 and No. 1000 sandpaper respectively, washed with absolute ethanol, and dried in an oven at 100°C. The above-mentioned carbon / carbon composite material sample was placed in a resistance furnace for micro-oxidation at 1100°C for 5 minutes.
[0037] Weigh 70g of Si powder, 7g of C powder, 10g of SiC powder, 13g of Al 2 o3 pink. Place in a turpentine ball mill jar, put agate balls of different numbers and diameters into the ball mill jar, and perform ball milling and mixing treatment on a planetary ball mill for 1 hour, and use it as an embedding material for later use. The purity of Si powder is 99.5%, particle size is 300 mesh, the purity of C powder is 99%, particle size is 320 mesh, SiC powder is analytically pure, particle size is 300 mesh, Al 2 o 3 The purity of the powder is analytically pure, and the particle size is 300 mesh.
[0038] Put half of the above-mentioned embed...
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