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Mullite fiber provided with SiBCN coating deposited on surface and preparation method of mullite fiber
The invention discloses mullite fiber provided with a SiBCN coating deposited on the surface. The mullite fiber comprises a mullite fiber matrix and the SiBCN coating deposited on the matrix, wherein the SiBCN coating is prepared from raw materials including borazine and liquid polycarbosilane with a CVD (chemical vapor deposition) process. A preparation method of the mullite fiber comprises the following steps: a mullite fiber deposition piece is placed in a solvent for cleaning, soaked in mullite sol for ultrasonic dispersion after cleaning, treated at high temperature in an atmosphere environment and placed in a depositing furnace; air in the depositing furnace is replaced; preheating is performed under set vacuum and temperature; carrier gas and diluent gas are introduced, borazine and liquid polycarbosilane are carried in by the carrier gas and diluted by the diluent gas, and SiBCN resolved by borazine and liquid polycarbosilane in a hearth of the depositing furnace is deposited gradually on the surface of the mullite fiber deposition piece to form the SiBCN coating. A product has uniform and compact coating, smooth surface and good high-temperature stability, and the antioxidant ability of the product can be improved.
Mullite fiber provided with SiBCN coating deposited on surface and preparation method of mullite fiber
The invention discloses mullite fiber provided with a SiBCN coating deposited on the surface. The mullite fiber comprises a mullite fiber matrix and the SiBCN coating deposited on the matrix, wherein the SiBCN coating is prepared from raw materials including borazine and liquid polycarbosilane with a CVD (chemical vapor deposition) process. A preparation method of the mullite fiber comprises the following steps: a mullite fiber deposition piece is placed in a solvent for cleaning, soaked in mullite sol for ultrasonic dispersion after cleaning, treated at high temperature in an atmosphere environment and placed in a depositing furnace; air in the depositing furnace is replaced; preheating is performed under set vacuum and temperature; carrier gas and diluent gas are introduced, borazine and liquid polycarbosilane are carried in by the carrier gas and diluted by the diluent gas, and SiBCN resolved by borazine and liquid polycarbosilane in a hearth of the depositing furnace is deposited gradually on the surface of the mullite fiber deposition piece to form the SiBCN coating. A product has uniform and compact coating, smooth surface and good high-temperature stability, and the antioxidant ability of the product can be improved.
Mullite fiber provided with SiBCN coating deposited on surface and preparation method of mullite fiber
CHENG HAIFENG (author) / LI JUNSHENG (author) / LIU HAITAO (author) / ZHOU YONGJIANG (author) / ZHENG WENWEI (author) / SUN XUN (author) / TONG SICHAO (author)
2015-05-13
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2015
| British Library Online Contents | 1993
Carbon fiber of externally-deposited SiBCN gradient coating and preparation method thereof
| European Patent Office | 2015