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
	Y. L. Li; Y. Liang; F. Zheng; X. F. Ma; S. J. Cui; L. L. Sun
	2001
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	16 期号:1 页码:67-75
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.
部门归属	acad sinica, inst met res, shenyang 110015, peoples r china. chinese acad sci, changchun inst appl chem, changchun 130022, peoples r china. chinese acad sci, inst phys, beijing 100080, peoples r china.;li, yl (reprint author), natl inst res inorgan mat, ctr adv mat res, namiki 1-1, tsukuba, ibaraki 3050044, japan, japan
关键词	Sinterable Ceramic Powders Standard Molar Enthalpies Laser-driven Reactions C-n Ceramics Crystal-structure Alpha-si3n4 Si Microstructure Transition Beta-si3n4
URL	查看原文
WOS记录号	WOS:000166281200014
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36705
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. L. Li,Y. Liang,F. Zheng,et al. Enhanced crystallization and phase transformation of amorphous silicon nitride under high pressure[J]. Journal of Materials Research,2001,16(1):67-75.
APA	Y. L. Li,Y. Liang,F. Zheng,X. F. Ma,S. J. Cui,&L. L. Sun.(2001).Enhanced crystallization and phase transformation of amorphous silicon nitride under high pressure.Journal of Materials Research,16(1),67-75.
MLA	Y. L. Li,et al."Enhanced crystallization and phase transformation of amorphous silicon nitride under high pressure".Journal of Materials Research 16.1(2001):67-75.