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Silicon carbide fiber-based magnesium oxide-alumina double-layer coating preparation method
The invention provides a silicon carbide fiber-based magnesium oxide-alumina double-layer coating preparation method, wherein the oxide coating comprises two layers, the inner layer component is magnesium oxide, and the outer layer component is alumina. The specific preparation method comprises: adding magnesium oxide particles to alcohol, carrying out wet ball milling to obtain fine powder, spraying the fine powder of the magnesium oxide onto pre-treated silicon carbide fiber bundle or fiber braiding body by using a plasma spraying technology to obtain silicon carbide fibers with the magnesium oxide coating, mixing aluminum isopropoxide, deionized water and a nitric acid solution to prepare an alumina sol, and carrying out immersing coating of the alumina sol onto the silicon carbide fibers so as to finally prepare the oxide coating adopting the silicon carbide fibers as the matrix. According to the present invention, the different processes are respectively used to prepare the alumina coating and the magnesium oxide coating, the operation steps are simple and easy to perform, and the high temperature resistance and the anti-oxidation property of the silicon carbide fibers are substantially improved.
Silicon carbide fiber-based magnesium oxide-alumina double-layer coating preparation method
The invention provides a silicon carbide fiber-based magnesium oxide-alumina double-layer coating preparation method, wherein the oxide coating comprises two layers, the inner layer component is magnesium oxide, and the outer layer component is alumina. The specific preparation method comprises: adding magnesium oxide particles to alcohol, carrying out wet ball milling to obtain fine powder, spraying the fine powder of the magnesium oxide onto pre-treated silicon carbide fiber bundle or fiber braiding body by using a plasma spraying technology to obtain silicon carbide fibers with the magnesium oxide coating, mixing aluminum isopropoxide, deionized water and a nitric acid solution to prepare an alumina sol, and carrying out immersing coating of the alumina sol onto the silicon carbide fibers so as to finally prepare the oxide coating adopting the silicon carbide fibers as the matrix. According to the present invention, the different processes are respectively used to prepare the alumina coating and the magnesium oxide coating, the operation steps are simple and easy to perform, and the high temperature resistance and the anti-oxidation property of the silicon carbide fibers are substantially improved.
Silicon carbide fiber-based magnesium oxide-alumina double-layer coating preparation method
CHEN ZHAOFENG (Autor:in) / WANG FEI (Autor:in)
23.12.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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