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Silicon carbide fiber provided with SiBCN coating deposited on surface and preparation method of silicon carbide fiber
The invention discloses silicon carbide fiber provided with a SiBCN coating deposited on the surface. The silicon carbide fiber comprises a silicon carbide fiber matrix and the SiBCN coating deposited on the matrix, wherein the SiBCN coating and the silicon carbide fiber matrix are combined through a mechanical meshing or chemical bonding mode, and the SiBCN coating is prepared from raw materials including borazine and liquid polycarbosilane with a CVD (chemical vapor deposition) process. A specific preparation method of the silicon carbide fiber comprises the following steps: a silicon carbide fiber matrix material is subjected to ultrasonic cleaning firstly, pretreated at high temperature and placed in a depositing furnace; air in the depositing furnace is replaced; preheating is performed under set vacuum at set temperature; carrier gas and diluent gas are introduced, borazine and liquid polycarbosilane are carried into a hearth of the depositing furnace by the carrier gas; and the SiBCN coating is formed on the surface of the silicon carbide fiber matrix material after a period of time. A product has uniform and compact coating, good high-temperature stability and good technical property, and the antioxidant ability of the silicon carbide fiber can be improved remarkably.
Silicon carbide fiber provided with SiBCN coating deposited on surface and preparation method of silicon carbide fiber
The invention discloses silicon carbide fiber provided with a SiBCN coating deposited on the surface. The silicon carbide fiber comprises a silicon carbide fiber matrix and the SiBCN coating deposited on the matrix, wherein the SiBCN coating and the silicon carbide fiber matrix are combined through a mechanical meshing or chemical bonding mode, and the SiBCN coating is prepared from raw materials including borazine and liquid polycarbosilane with a CVD (chemical vapor deposition) process. A specific preparation method of the silicon carbide fiber comprises the following steps: a silicon carbide fiber matrix material is subjected to ultrasonic cleaning firstly, pretreated at high temperature and placed in a depositing furnace; air in the depositing furnace is replaced; preheating is performed under set vacuum at set temperature; carrier gas and diluent gas are introduced, borazine and liquid polycarbosilane are carried into a hearth of the depositing furnace by the carrier gas; and the SiBCN coating is formed on the surface of the silicon carbide fiber matrix material after a period of time. A product has uniform and compact coating, good high-temperature stability and good technical property, and the antioxidant ability of the silicon carbide fiber can be improved remarkably.
Silicon carbide fiber provided with SiBCN coating deposited on surface and preparation method of silicon carbide fiber
LI JUNSHENG (author) / CHENG HAIFENG (author) / SUN XUN (author) / LIU HAITAO (author) / ZHANG CHAOYANG (author) / TONG SICHAO (author)
2015-05-13
Patent
Electronic Resource
English
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