The 1300 °C isothermal section in the Nb-Sn-C ternary phase diagram

被引：4

作者：

Barsoum, MW ^{[1
]}

Ganguly, A

Seifert, HJ

Aldinger, F

机构：

[1] Drexel Univ, Dept Mat Engn, Philadelphia, PA 19104 USA

[2] Max Planck Inst Met Res, Pulvermet Lab, Stuttgart, Germany

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2002年 / 337卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

transition metal alloys and compounds; X-ray diffraction; phase diagrams; metallography;

D O I：

10.1016/S0925-8388(01)01952-1

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：

In this paper we map out the 1300 degreesC isothermal section in the Nb-Sn-C ternary system. The results show that the only ternary compound in the system, Nb2SnC, is in equilibrium with Sn, NbCx, and Nb3Sn, but not with Nb, Nb2C or C. The Nb2SnC phase is not a stoichiometric compound but exists over a range of compositions that range from an Nb:Sn:C ratio of similar to54:22:24 at.%, when in equilibrium with NbC and Nb3Sn, to similar to49:28:23 at.% when in equilibrium with NbC and Sn. Assuming, the Nb and Sri sublattices to be fully occupied these chemistries translate to: Nb2.2Sn0.8C0.93 and Nb1.92Sn1.08C0.91 respectively. When in equilibrium with NbC and Nb2SnC. Nb3Sn can dissolve up to 5 at.% C. Similarly, Nb can simultaneously dissolve 2.5 at.% and 4.6 at.% of Sn and C. respectively. A correlation was also found between the lattice parameters and the Nb-concentration. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：202 / 207

页数：6

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