The stabilization of Pt3Al phase with Ll2 structure in Pt-Al-Ir-Nb and Pt-Al-Nb alloys

被引：19
|
作者：
Huang, C [1 ]
Yamabe-Mitarai, Y [1 ]
Harada, H [1 ]
机构：
[1] NIMS, Tsukuba, Ibaraki 3050047, Japan
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2004年 / 366卷 / 1-2期
关键词：
intermetallics; crystal structure; phase transitions;
D O I：
10.1016/S0925-8388(03)00748-5
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：
It has been reported that the Pt3Al phase has two crystal structures: the high-temperature cubic form of L1(2) and the low-temperature tetragonal form of the distorted L1(2) structure D0'c. In this study, the structure of the Pt3Al phase in quaternary Pt-Al-Ir-Nb and ternary Pt-Al-Nb alloys was investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), differential thermal analysis (DTA), and transmission electron microscopy (TEM) technologies. The structure form was determined to be cubic L1(2). The stabilization of the L1(2)-Pt3Al structure in room temperature was attributed to the effect of Nb. (C) 2003 Elsevier B.V. All rights reserved.
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收藏
页码：217 / 221
页数：5
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