Phase equilibria of the Cu-Nb-Ti system at 850°C

被引：11
|
作者：
Xu, HH [1 ]
Du, Y [1 ]
Huang, BY [1 ]
Liu, SH [1 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2005年 / 399卷 / 1-2期
关键词：
Cu-Nb-Ti ternary system; phase equilibrium; diffusion couple; EPMA;
D O I：
10.1016/j.jallcom.2005.02.039
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 of the Cu-Nb-Ti system at 850 degrees C were investigated by a high-efficiency diffusion couple approach. The samples were studied by means of optical microscopy, scanning electron microscopy and electron probe microanalysis. At 850 degrees C, the phase TiCu2, the stability range of which is controversial in the literature, was observed. The solubilities of Nb in Ti2Cu, TiCu and Ti3Cu4 were determined to be 3.5, 3.1 and 4.6 at.%, respectively. The solubility of Nb in TiCu4 was negligibly small. The following three-phase equilibria were observed: Ti2Cu + TiCu + (Nb,Ti), TiCu + Ti3Cu4 + (Nb,Ti) and Ti3Cu4 + TiCu4 + (Nb,Ti). (c) 2005 Elsevier B.V. All rights reserved.
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页码：92 / 95
页数：4
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