FORMATION AND CHARACTERIZATION OF ALPHA-SI3N4 WHISKERS FROM LASER SYNTHESIZED NANO AMORPHOUS SI-N-C POWDERS

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	FORMATION AND CHARACTERIZATION OF ALPHA-SI3N4 WHISKERS FROM LASER SYNTHESIZED NANO AMORPHOUS SI-N-C POWDERS
	Y. L. Li ; Y. Liang ; Z. Q. Hu
刊名	Ceramics International
	1995
卷号	21 期号:1 页码:59-64
关键词	chemical-vapor-deposition silicon-nitride si3n4
ISSN号	0272-8842
中文摘要	alpha-Si3N4 whiskers have been prepared from the laser-synthesized nanometric amorphous Si-N-C powders at 1873 K under 1 atm N-2. The as-formed whiskers were characterized by TEM, STEM, FTIR and XRD techniques and the process conditions were studied. The whiskers exhibit four types of morphologies: the long, thick, straight, the prismatic, the ribbon-like, and knuckled whiskers. The gas phase reaction among N-2, SiO, and CO gases leads to the formation of Si3N4, nucleated on the pre-crystallized alpha-Si3N4 grains, which ensures an in situ formation, and grows rapidly by a VS mechanism along specific crystal planes such as {1101}. Thermochemical analysis indicates that the higher Si3N4 whisker formation temperature of 1873 K for the gas phase reaction results from the lower P-CO/P-SiO ratio in the Si-N-C system.
原文出处	://WOS:A1995QM12300009
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/38601]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. L. Li,Y. Liang,Z. Q. Hu. FORMATION AND CHARACTERIZATION OF ALPHA-SI3N4 WHISKERS FROM LASER SYNTHESIZED NANO AMORPHOUS SI-N-C POWDERS[J]. Ceramics International,1995,21(1):59-64.
APA	Y. L. Li,Y. Liang,&Z. Q. Hu.(1995).FORMATION AND CHARACTERIZATION OF ALPHA-SI3N4 WHISKERS FROM LASER SYNTHESIZED NANO AMORPHOUS SI-N-C POWDERS.Ceramics International,21(1),59-64.
MLA	Y. L. Li,et al."FORMATION AND CHARACTERIZATION OF ALPHA-SI3N4 WHISKERS FROM LASER SYNTHESIZED NANO AMORPHOUS SI-N-C POWDERS".Ceramics International 21.1(1995):59-64.