Moderate-temperature antioxidation coating and preparation method thereof, and carbon/carbon composite product
The invention provides a moderate-temperature antioxidation coating which is prepared by sintering a coating intermediate. The coating intermediate comprises a first coating compounded on a matrix surface, a second coating compounded on the first coating, and an ethyl orthosilicate layer compounded...
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Main Authors | , , |
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Format | Patent |
Language | Chinese English |
Published |
25.05.2016
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Subjects | |
Online Access | Get full text |
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Summary: | The invention provides a moderate-temperature antioxidation coating which is prepared by sintering a coating intermediate. The coating intermediate comprises a first coating compounded on a matrix surface, a second coating compounded on the first coating, and an ethyl orthosilicate layer compounded on the second coating. The first coating is prepared from a H3BO3-H3PO4 mixed acid solution. The second coating is prepared from B2O3, SiO2, Mn(H2PO4)2, ZrO2, CaF2, Al2O3, B4C, CeO2 and silica sol. The manganese can promote the flowability of the anti-glass phase in the sintering process; and by using the ethyl orthosilicate as a hole sealing agent, the silicon dioxide generated in the sintering process can fill pores in the antioxidation coating and reduce the risk of peeling of the antioxidation coating. The invention also provides a preparation method of the moderate-temperature antioxidation coating and a carbon/carbon composite product. |
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Bibliography: | Application Number: CN2016171452 |