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High-temperature-resistant and thermal-shock-resistant SiC/B4C composite coating and preparation method thereof
The invention relates to a high-temperature-resistant and thermal-shock-resistant SiC/B4C composite coating and a preparation method thereof. The composite coating comprises a SiC coating deposited on a substrate material and a B4C coating deposited on the outer surface of the SiC coating. The SiC and B4C coatings are combined, so that the defects that SiO2 produced by a single-layer SiC coating through oxidation has poor volatility at the low temperature and cannot completely seal cracks of the coating are overcome; meanwhile, B2O3 produced by the B4C through oxidation at the low temperature has good liquidity and effectively blocks invasion of oxygen, when the oxygen invades an inner SiC layer from the outside, the surface temperature of the material is increased, and the SiO2 has the good fluidity, so that the cracks can be sealed effectively.
High-temperature-resistant and thermal-shock-resistant SiC/B4C composite coating and preparation method thereof
The invention relates to a high-temperature-resistant and thermal-shock-resistant SiC/B4C composite coating and a preparation method thereof. The composite coating comprises a SiC coating deposited on a substrate material and a B4C coating deposited on the outer surface of the SiC coating. The SiC and B4C coatings are combined, so that the defects that SiO2 produced by a single-layer SiC coating through oxidation has poor volatility at the low temperature and cannot completely seal cracks of the coating are overcome; meanwhile, B2O3 produced by the B4C through oxidation at the low temperature has good liquidity and effectively blocks invasion of oxygen, when the oxygen invades an inner SiC layer from the outside, the surface temperature of the material is increased, and the SiO2 has the good fluidity, so that the cracks can be sealed effectively.
High-temperature-resistant and thermal-shock-resistant SiC/B4C composite coating and preparation method thereof
DONG SHAOMING (author) / LIAO CHUNJING (author) / ZHANG XIANGYU (author) / GAO LE (author)
2015-12-23
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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