Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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Preparation method of high-temperature-resistant coating for ceramic-based composite material
The invention belongs to the technical field of coating materials, and provides a preparation method of a high-temperature-resistant coating for a ceramic-based composite material. According to the invention, tetraethoxysilane and N,N-dimethylformamide are respectively used as an anti-gelling agent and a dispersing agent, and the coating is obtained on the surface of the ceramic-based composite material by adopting a process consisting of dipping, mould pressing low-temperature gelatinization and high-temperature cracking. The preparation method is short in preparation period and low in cost;the temperature of mold pressing low-temperature gelatinization and high-temperature cracking is lower than 1000 DEG C, so influence on the ceramic-based composite material is small; the strength retention rate of the material obtained after the obtained coating is oxidized at 1500 DEG C for 1 h is larger than or equal to 60%, so good high-temperature resistance is achieved; the coating is good inconsistency, has high binding force (larger than or equal to 10 MPa) with a matrix, presents good compactness and integrity and can be applied to the field of aerospace.
本发明涂层材料技术领域，提供了一种陶瓷基复合材料用耐高温涂层的制备方法，它以正硅酸乙酯和N，N‑二甲基甲酰胺分别作为抗凝胶剂和分散剂，采用浸渍‑模压低温凝胶化‑高温裂解工艺在陶瓷基复合材料表面得到涂层。本发明制备周期短、成本低，模压低温凝胶化‑高温裂解的温度均低于1000℃，对陶瓷基复合材料的影响小；所得涂层1500℃氧化1h后的材料的强度保留率≥60％，具有较好的耐高温性能，涂层一致性较好，涂层与基体具有较强的结合力(≥10MPa)，涂层具有较好致密性和完整性，可应用于航空航天领域中。
Preparation method of high-temperature-resistant coating for ceramic-based composite material
The invention belongs to the technical field of coating materials, and provides a preparation method of a high-temperature-resistant coating for a ceramic-based composite material. According to the invention, tetraethoxysilane and N,N-dimethylformamide are respectively used as an anti-gelling agent and a dispersing agent, and the coating is obtained on the surface of the ceramic-based composite material by adopting a process consisting of dipping, mould pressing low-temperature gelatinization and high-temperature cracking. The preparation method is short in preparation period and low in cost;the temperature of mold pressing low-temperature gelatinization and high-temperature cracking is lower than 1000 DEG C, so influence on the ceramic-based composite material is small; the strength retention rate of the material obtained after the obtained coating is oxidized at 1500 DEG C for 1 h is larger than or equal to 60%, so good high-temperature resistance is achieved; the coating is good inconsistency, has high binding force (larger than or equal to 10 MPa) with a matrix, presents good compactness and integrity and can be applied to the field of aerospace.
本发明涂层材料技术领域，提供了一种陶瓷基复合材料用耐高温涂层的制备方法，它以正硅酸乙酯和N，N‑二甲基甲酰胺分别作为抗凝胶剂和分散剂，采用浸渍‑模压低温凝胶化‑高温裂解工艺在陶瓷基复合材料表面得到涂层。本发明制备周期短、成本低，模压低温凝胶化‑高温裂解的温度均低于1000℃，对陶瓷基复合材料的影响小；所得涂层1500℃氧化1h后的材料的强度保留率≥60％，具有较好的耐高温性能，涂层一致性较好，涂层与基体具有较强的结合力(≥10MPa)，涂层具有较好致密性和完整性，可应用于航空航天领域中。
Preparation method of high-temperature-resistant coating for ceramic-based composite material
一种陶瓷基复合材料用耐高温涂层的制备方法
WEN JIN (Autor:in) / LUO FEI (Autor:in) / TIAN XIUYING (Autor:in) / ZHONG HONGBIN (Autor:in) / YAN ZHIHAO (Autor:in) / CHEN BING (Autor:in) / YI LU (Autor:in)
29.09.2020
Patent
Elektronische Ressource
Chinesisch
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