Enhanced crystallization and phase transformation of amorphous silicon nitride under high pressure
文献类型：期刊论文
| 作者 | Y. L. Li ; Y. Liang ; F. Zheng ; X. F. Ma ; S. J. Cui ; L. L. Sun |
| 刊名 | Journal of Materials Research
 |
| 出版日期 | 2001 |
| 卷号 | 16期号:1页码:67-75 |
| 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 |
| 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. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/36705]  |
| 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,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. |
入库方式： OAI收割
来源：金属研究所
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