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Ultra-Fine Treatment of SiC Powder and Its Effect on Microstructure and Properties of SiC Ceramic

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Abstract:

The ultra-fine treatment of industrial SiC powder was carried out by fluidized bed opposed jet milling (QLM-100K), and the influences of grinding parameters on the ultra-fine treatment were studied. A better grinding result is achieved through a higher crushing pressure and a higher sorter frequency and the ultra-fine treated SiC powder possesses a smaller particle size, a narrower particle-size distribution, a higher specific surface area and reduced agglomeration. The effects of ultra-fine treatment on the compaction behaviors, sintering behaviors, properties and microstructure of SiC ceramics were investigated. The compact with ultra-fine treated powder has a higher density and a lower sintering temperature. The densification and mechanical properties of the ceramics can be ameliorated obviously and the microstructure defects of the ceramics decrease.

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Periodical:

Key Engineering Materials (Volumes 280-283)

Pages:

1313-1316

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.280-283.1313

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Online since:

February 2007

Authors:

Xing Zhong Guo, Li Li, Li Hua Gao, Pei Xin Fu

Keywords:

Fluidized Bed Opposed Jet Milling, Property Analysis, SiC Powder, Ultra-Fine Treatment

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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