Experimental investigation of phase equilibria in the Co-W-Nb ternary system

被引：13
作者：
Liu, Xingjun
Zhang, Xinqiao
Yang, Shuiyuan
Zhao, Cancan
Wang, Cuiping [1 ]
机构：
[1] Xiamen Univ, Dept Mat Sci & Engn, Coll Mat, Xiamen 361005, Peoples R China
来源：
INTERMETALLICS | 2012年 / 31卷
基金：
中国国家自然科学基金;
关键词：
Ternary alloy systems; Phase diagrams; Microstructure; Electron microprobe; ALLOYS; GROWTH;
D O I：
10.1016/j.intermet.2012.06.008
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The phase equilibria in the Co-W-Nb ternary system were experimentally investigated using optical microscopy, electron probe microanalysis and X-ray diffraction on equilibrated alloys. In this study, isothermal sections of the Co-W-Nb ternary system at 1000 degrees C, 1100 degrees C and 1200 degrees C were determined, and no ternary compound was found. Further results show that a Nb-stabilized Co3W phase is stable at 1100 degrees C, but not at 1200 degrees C in the Co-W-Nb system. The alpha Co2Nb and gamma Co2Nb phases were identified to possess large solubility of W in the present study. The newly determined phase equilibria of the Co-W-Nb in the present study will provide useful information for the development of cemented carbides and high-temperature structural materials. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：48 / 54
页数：7
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