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Mechanism of the formation of β–Sialon by self-propagating high-temperature synthesis

Published online by Cambridge University Press:  31 January 2011

Yuanwen Wu ,
Hanrui Zhuang ,
Fengying Wu ,
David Dollimore ,
Baolin Zhang ,
Shen Chen  and
Wenlan Li
Yuanwen Wu
Affiliation:
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
Hanrui Zhuang
Affiliation:
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
Fengying Wu
Affiliation:
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
David Dollimore
Affiliation:
Department of Chemistry, The University of Toledo, Toledo, Ohio 43606-3390
Baolin Zhang
Affiliation:
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
Shen Chen
Affiliation:
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
Wenlan Li
Affiliation:
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
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Extract

β–Sialon has been prepared by SHS (Self-propagating High-temperature Synthesis) with Si, Al, Al2O3, and β–Si3N4 under high nitrogen pressure. Rod-like crystals of b–Sialon with an aspect ratio of 4–15 and whiskers with various aspect ratios were obtained in the process. Considering the morphologies of the products, it is concluded that VLS (vapor-liquid-solid) is the predominant mechanism of the formation of rod-like crystals and whiskers.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 1 , January 1998 , pp. 166 - 172
Copyright
Copyright © Materials Research Society 1998

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