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Preparation method of alumina fiber reinforced alumina foamed ceramic composite material containing interface strengthening structure
The invention relates to a preparation method of an alumina fiber reinforced alumina foam ceramic composite material containing an interface strengthening structure, which comprises the following steps: firstly, preparing alumina nascent fiber which is a type of polymerized aluminum hydroxide colloid fiber in nature and has abundant hydroxyl groups on the surface; in the process of medium-temperature treatment and high-temperature firing of a foamed ceramic composite material green body, a hydroxyl group is used as a surface reaction active site and reacts with the foamed ceramic green body through a chemical cross-linking reaction between the foamed ceramic green body and a surface hydroxyl group to generate an interface strengthening structure; the technical problems that existing physical combination easily causes insufficient interface combination, cannot effectively transmit loads and easily generates microcracks are solved, the foamed ceramic composite material has the advantage of being high in strength, and the heat insulation-structure integration function in the ultra-high-temperature environment can be achieved.
本发明涉及一种含界面强化结构的氧化铝纤维增强氧化铝泡沫陶瓷复合材料的制备方法，本发明首先制得氧化铝初生纤，氧化铝初生纤本质为一类聚合的氢氧化铝胶体纤维，表面具有丰富的羟基基团，在泡沫陶瓷复合材料生坯中温处理和高温烧成过程中，羟基基团作为表面反应活性位点，通过泡沫陶瓷生坯与表面羟基的化学交联反应，与泡沫陶瓷生坯发生反应生成界面强化结构；解决了现有物理结合容易造成界面结合不充分，不能有效传递载荷，容易产生微裂纹的技术难题，本发明的的泡沫陶瓷复合材料具有高强度的特点，可实现超高温环境的隔热‑结构一体化功能。
Preparation method of alumina fiber reinforced alumina foamed ceramic composite material containing interface strengthening structure
The invention relates to a preparation method of an alumina fiber reinforced alumina foam ceramic composite material containing an interface strengthening structure, which comprises the following steps: firstly, preparing alumina nascent fiber which is a type of polymerized aluminum hydroxide colloid fiber in nature and has abundant hydroxyl groups on the surface; in the process of medium-temperature treatment and high-temperature firing of a foamed ceramic composite material green body, a hydroxyl group is used as a surface reaction active site and reacts with the foamed ceramic green body through a chemical cross-linking reaction between the foamed ceramic green body and a surface hydroxyl group to generate an interface strengthening structure; the technical problems that existing physical combination easily causes insufficient interface combination, cannot effectively transmit loads and easily generates microcracks are solved, the foamed ceramic composite material has the advantage of being high in strength, and the heat insulation-structure integration function in the ultra-high-temperature environment can be achieved.
本发明涉及一种含界面强化结构的氧化铝纤维增强氧化铝泡沫陶瓷复合材料的制备方法，本发明首先制得氧化铝初生纤，氧化铝初生纤本质为一类聚合的氢氧化铝胶体纤维，表面具有丰富的羟基基团，在泡沫陶瓷复合材料生坯中温处理和高温烧成过程中，羟基基团作为表面反应活性位点，通过泡沫陶瓷生坯与表面羟基的化学交联反应，与泡沫陶瓷生坯发生反应生成界面强化结构；解决了现有物理结合容易造成界面结合不充分，不能有效传递载荷，容易产生微裂纹的技术难题，本发明的的泡沫陶瓷复合材料具有高强度的特点，可实现超高温环境的隔热‑结构一体化功能。
Preparation method of alumina fiber reinforced alumina foamed ceramic composite material containing interface strengthening structure
一种含界面强化结构的氧化铝纤维增强氧化铝泡沫陶瓷复合材料的制备方法
LIU BENXUE (Autor:in) / ZHU LUYI (Autor:in) / XU DONG (Autor:in) / WANG XINQIANG (Autor:in) / ZHANG GUANGHUI (Autor:in)
14.05.2024
Patent
Elektronische Ressource
Chinesisch
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