Reaction kinetics in Ti3SiC2 synthesis studied by time-resolved neutron diffraction
文献类型：期刊论文
| 作者 | E. Wu ; D. P. Riley ; E. H. Kisi ; R. I. Smith |
| 刊名 | Journal of the European Ceramic Society
 |
| 出版日期 | 2005 |
| 卷号 | 25期号:15页码:3503-3508 |
| 关键词 | sintering carbides kinetics Ti3SiC2 neutron diffraction high-temperature synthesis powder diffraction phase-change microstructure nucleation growth |
| ISSN号 | 0955-2219 |
| 中文摘要 | The reactive sintering of 3Ti/SiC/C to form the ternary carbide Ti3SiC2, previously found to involve the intermediate phases TiCx and Ti5Si3Cx, was investigated by time-resolved neutron powder diffraction. The kinetics of Ti3SiC2 formation from the intermediate phases TiCx Ti5Si3Cx (x <= 1) and a small amount of free C was determined. The crystallization rate of the Ti3SiC2 phase was determined through quantitative analyses of the diffraction patterns collected at different temperatures and is initially well-described by the Mehl-Avrami-Johnson equation. The activation energy was found to be 380 +/- 10 kj/mol and the Avrami exponent 3.0 +/- 0.2. The Avrami exponent decreases to close to I when more than half of the crystallization process was completed. This indicates a change in the mechanism of Ti3SiC2 crystal growth from unrestricted two or three-dimensional growth in the a-b planes to one-dimensional growth only, due to interaction of the growing,disk-like crystals and cessation of growth in the preferred direction. (c) 2004 Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35110]  |
| 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 | E. Wu,D. P. Riley,E. H. Kisi,et al. Reaction kinetics in Ti3SiC2 synthesis studied by time-resolved neutron diffraction[J]. Journal of the European Ceramic Society,2005,25(15):3503-3508. |
| APA | E. Wu,D. P. Riley,E. H. Kisi,&R. I. Smith.(2005).Reaction kinetics in Ti3SiC2 synthesis studied by time-resolved neutron diffraction.Journal of the European Ceramic Society,25(15),3503-3508. |
| MLA | E. Wu,et al."Reaction kinetics in Ti3SiC2 synthesis studied by time-resolved neutron diffraction".Journal of the European Ceramic Society 25.15(2005):3503-3508. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。