Enhanced crystallization and phase transformation of amorphous silicon nitride under high pressure

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	Enhanced crystallization and phase transformation of amorphous silicon nitride under high pressure
	Li, YL ; Liang, Y ; Zheng, F ; Ma, XF ; Cui, SJ ; Sun, LL
刊名	JOURNAL OF MATERIALS RESEARCH
	2001
卷号	16 期号:1 页码:67
关键词	SINTERABLE CERAMIC POWDERS STANDARD MOLAR ENTHALPIES LASER-DRIVEN REACTIONS C-N CERAMICS CRYSTAL-STRUCTURE ALPHA-SI3N4 SI MICROSTRUCTURE TRANSITION BETA-SI3N4
ISSN号	0884-2914
通讯作者	Li, YL: Natl Inst Res Inorgan Mat, Ctr Adv Mat Res, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan.
中文摘要	The crystallization and phase transformation of amorphous Si3N4 ceramics under high pressure (1.0-5.0 GPa) between 800 and 1700 degreesC were investigated. A greatly enhanced crystallization and alpha-beta transformation of the amorphous Si3N4 ceramics were evident under the high pressure, as characterized by that, at 5.0 GPa, the amorphous Si3N4, began to crystallize at a temperature as low as 1000 degreesC (to transform to alpha modification). The subsequent alpha-beta transformation occurred completed between 1350 and 1420 degreesC after only 20 min of pressing at 5.0 GPa. In contrast, under 0.1 MPa N-2, the identical amorphous materials were stable up to 1400 degreesC without detectable crystallization, and only a small amount of a phase was detected at 1500 degreesC. The crystallization temperature and the alpha-beta transformation temperatures are reduced by 200-350 degreesC compared to that at normal pressure. The enhanced phase transformations of the amorphous Si3N4, were discussed on the basis of thermodynamic and kinetic consideration of the effects of pressure on nucleation and growth.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/37335]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Li, YL,Liang, Y,Zheng, F,et al. Enhanced crystallization and phase transformation of amorphous silicon nitride under high pressure[J]. JOURNAL OF MATERIALS RESEARCH,2001,16(1):67.
APA	Li, YL,Liang, Y,Zheng, F,Ma, XF,Cui, SJ,&Sun, LL.(2001).Enhanced crystallization and phase transformation of amorphous silicon nitride under high pressure.JOURNAL OF MATERIALS RESEARCH,16(1),67.
MLA	Li, YL,et al."Enhanced crystallization and phase transformation of amorphous silicon nitride under high pressure".JOURNAL OF MATERIALS RESEARCH 16.1(2001):67.