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Three-dimensional fiber prefabricated-part enhancement mullite composite and preparation method thereof
The invention discloses a three-dimensional fiber prefabricated-part enhancement mullite composite and a preparation method thereof. The preparation method comprises impregnating three-dimensional fiber prefabricated parts in an A1203-SiO2 composite sol to be impregnated, dried and subjected to low-temperature thermal processing to obtain the A1203-SiO2 impregnated three-dimensional fiber prefabricated parts; repeating the process till the weight gaining of the A1203-SiO2 impregnated three-dimensional fiber prefabricated parts is lower than 1% to obtain three-dimensional fiber prefabricated-part first intermediates, performing medium-temperature thermal processing, subjecting the medium-temperature thermal processed three-dimensional fiber prefabricated-part first intermediates to impregnation, high-pressure processing, drying, low-temperature thermal processing and medium-temperature thermal processing, circulation the process till the weight gaining is lower than 1%, and performing high-temperature thermal treatment. According to the composite and the preparation method thereof, by three-stage thermal treatment, the compactness of the three-dimensional fiber prefabricated-part enhancement mullite can be further improved, and the mechanical performance and the oxidation resistance of the enhancement composite are enhanced.
Three-dimensional fiber prefabricated-part enhancement mullite composite and preparation method thereof
The invention discloses a three-dimensional fiber prefabricated-part enhancement mullite composite and a preparation method thereof. The preparation method comprises impregnating three-dimensional fiber prefabricated parts in an A1203-SiO2 composite sol to be impregnated, dried and subjected to low-temperature thermal processing to obtain the A1203-SiO2 impregnated three-dimensional fiber prefabricated parts; repeating the process till the weight gaining of the A1203-SiO2 impregnated three-dimensional fiber prefabricated parts is lower than 1% to obtain three-dimensional fiber prefabricated-part first intermediates, performing medium-temperature thermal processing, subjecting the medium-temperature thermal processed three-dimensional fiber prefabricated-part first intermediates to impregnation, high-pressure processing, drying, low-temperature thermal processing and medium-temperature thermal processing, circulation the process till the weight gaining is lower than 1%, and performing high-temperature thermal treatment. According to the composite and the preparation method thereof, by three-stage thermal treatment, the compactness of the three-dimensional fiber prefabricated-part enhancement mullite can be further improved, and the mechanical performance and the oxidation resistance of the enhancement composite are enhanced.
Three-dimensional fiber prefabricated-part enhancement mullite composite and preparation method thereof
MA QINGSONG (author) / LIANG SONGLIN (author)
2015-08-26
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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