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A platform for research: civil engineering, architecture and urbanism
Mullite anti-oxidation coating for composite material and preparation method of mullite anti-oxidation coating
The invention relates to a mullite anti-oxidation coating for a composite material and a preparation method of the mullite anti-oxidation coating. The preparation method comprises the following steps of: preparing an Al (NO3) 3.9 H2O solution; putting the Al (NO3) 3.9 H2O solution into a hydrothermal pot, continuously stirring, and dropwise adding a proper amount of ammonia water to generate Al (OH) 3 transparent sol; adding transparent silica sol into the Al (OH) 3 transparent sol; placing the mixed sol in the previous step on a roller ball mill for ball milling; placing a pretreated C/C composite material substrate and the mixed sol on liquid-phase plasma spraying equipment, and spraying Al (OH) 3 and SiO2 coatings on the substrate by using suspension plasma spraying equipment; and carrying out vacuum heat treatment on the prepared coatings at high temperature to make the coatings react to generate a mullite coating. According to the invention, Al2O3 and SiO2 are compounded to generate a mullite phase with better high-temperature stability, so that the oxidation resistance of the composite material is improved, and the service life of the composite material is prolonged.
本发明一种复合材料用莫来石防氧化涂层及其制备方法，该制备方法包括：配制Al(NO3)3·9H2O溶液；将Al(NO3)3·9H2O溶液置于水热锅中，持续搅拌并逐滴滴加适量的氨水，生成Al(OH)3透明溶胶；向Al(OH)3透明溶胶中加入透明硅溶胶；将上步骤中的混合溶胶置于辊式球磨机上进行球磨；将预处理后的C/C复合材料基板和混合溶胶置于液相等离子喷涂设备上，利用悬浮液等离子喷涂设备在基板上喷涂Al(OH)3和SiO2涂层；将制备的涂层在高温下进行真空热处理，使其发生反应生成莫来石涂层。本发明通过将Al2O3和SiO2两种氧化物进行复合，生成一种高温稳定性更好的莫来石相，从而改善复合材料的抗氧化性，延长其使用寿命。
Mullite anti-oxidation coating for composite material and preparation method of mullite anti-oxidation coating
The invention relates to a mullite anti-oxidation coating for a composite material and a preparation method of the mullite anti-oxidation coating. The preparation method comprises the following steps of: preparing an Al (NO3) 3.9 H2O solution; putting the Al (NO3) 3.9 H2O solution into a hydrothermal pot, continuously stirring, and dropwise adding a proper amount of ammonia water to generate Al (OH) 3 transparent sol; adding transparent silica sol into the Al (OH) 3 transparent sol; placing the mixed sol in the previous step on a roller ball mill for ball milling; placing a pretreated C/C composite material substrate and the mixed sol on liquid-phase plasma spraying equipment, and spraying Al (OH) 3 and SiO2 coatings on the substrate by using suspension plasma spraying equipment; and carrying out vacuum heat treatment on the prepared coatings at high temperature to make the coatings react to generate a mullite coating. According to the invention, Al2O3 and SiO2 are compounded to generate a mullite phase with better high-temperature stability, so that the oxidation resistance of the composite material is improved, and the service life of the composite material is prolonged.
本发明一种复合材料用莫来石防氧化涂层及其制备方法，该制备方法包括：配制Al(NO3)3·9H2O溶液；将Al(NO3)3·9H2O溶液置于水热锅中，持续搅拌并逐滴滴加适量的氨水，生成Al(OH)3透明溶胶；向Al(OH)3透明溶胶中加入透明硅溶胶；将上步骤中的混合溶胶置于辊式球磨机上进行球磨；将预处理后的C/C复合材料基板和混合溶胶置于液相等离子喷涂设备上，利用悬浮液等离子喷涂设备在基板上喷涂Al(OH)3和SiO2涂层；将制备的涂层在高温下进行真空热处理，使其发生反应生成莫来石涂层。本发明通过将Al2O3和SiO2两种氧化物进行复合，生成一种高温稳定性更好的莫来石相，从而改善复合材料的抗氧化性，延长其使用寿命。
Mullite anti-oxidation coating for composite material and preparation method of mullite anti-oxidation coating
一种复合材料用莫来石防氧化涂层及其制备方法
CAO HAITAO (author) / CUI XIONGHUA (author) / ZHANG LEI (author) / YANG ZHEYI (author) / CUI JINWEN (author) / WANG HONGZHE (author)
2022-01-14
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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