期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 100, 期 12, 页码 5471-5481出版社
WILEY
DOI: 10.1111/jace.15167
关键词
ceramic composites; reactive melt infiltration; silicides; silicon carbide
资金
- Office of Naval Research [N00014-13-1-0860]
- Division of Materials Research [DMR 1121053]
A comparative study of reactive melt infiltration using Si and Si-Y alloys is presented to provide insight into the governing processes that control the effectiveness of the melt interaction with a carbonaceous preform and the temperature capability of the SiC matrix for ceramic matrix composites. Through experiments on two substantially different scales of capillaries in porous graphite tubes using Si and Si-Y alloys, the current study has characterized the phenomena that play a role in the infiltration of the melt and its reaction with the preform. It is shown that (i) the interface reaction controls wetting in both large and small capillaries and the climb rate is enhanced by the presence of Y; (ii) reaction choking occurs at critical throats within the pore network, usually behind the infiltration front; and (iii) different residual silicides can form during reaction and upon cooling. A potential mechanism for SiC growth is described, and the implications for the interplay between SiC growth and infiltration are discussed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据