In Situ Synthesis of SiC and β-Si3Al3O3N5 Whiskers in Alumina Carbon Based Materials

Xiang Cheng Li; Bo Quan Zhu; Fei Zhao

doi:10.4028/www.scientific.net/MSF.745-746.663

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HomeMaterials Science ForumMaterials Science Forum Vols. 745-746In Situ Synthesis of SiC and β-Si3Al3O3N5 Whiskers...

In Situ Synthesis of SiC and β-Si₃Al₃O₃N₅ Whiskers in Alumina Carbon Based Materials

Abstract:

SiC whiskers are the common reinforced phases in alumina carbon refractories. In this paper, the effect of transition metal catalyst on the evolution of matrix phase and the formation of β-Si₃Al₃O₃N₅ whiskers were studied. It was found that the whiskers of both SiC and β-Si₃Al₃O₃N₅ in alumina carbon materials with the catalyst in reducing atmosphere were generated. The existence of catalyst can promote the nitriding process of Si metal and facilitate the formation of β-Si₃Al₃O₃N₅ whiskers. The growth mechanism of both SiC and β-Si₃Al₃O₃N₅ whiskers agrees with the vapor-liquid-solid model.

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Materials Science Forum (Volumes 745-746)

Pages:

663-666

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.745-746.663

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Online since:

February 2013

Authors:

Xiang Cheng Li, Bo Quan Zhu, Fei Zhao

Keywords:

Alumina Carbon Refractories, Catalyst, SiC Whiskers, β-Si₃Al₃O₃N₅ Whiskers

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