Thermal conductivity mapping of the Ni-Al system and the beta-NiAl phase in the Ni-Al-Cr system

被引：37
|
作者：
Zhao, Ji-Cheng [1 ]
Zheng, Xuan [2 ]
Cahill, David G. [2 ]
机构：
[1] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA
[2] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
来源：
SCRIPTA MATERIALIA | 2012年 / 66卷 / 11期
基金：
美国国家科学基金会;
关键词：
Thermal conductivity; Point defects; Nickel aluminides; Diffusion; Ordering; NICKEL SOLID-SOLUTIONS; SITE PREFERENCE; APFIM INVESTIGATIONS; ALLOYS; COMBINATORIAL; ELEMENTS;
D O I：
10.1016/j.scriptamat.2012.02.035
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We use two examples to highlight the power of micron-scale-resolution thermal conductivity mapping on graded compositions created in a diffusion-multiple sample in rapid establishment of composition-phase-property relationships. The Ni-NiAl diffusion couple example clearly shows the effects of solid solutioning, order-disorder transition, and compositional point defects on thermal conductivity. Thermal conductivity mapping of the beta-NiAl phase region of an Ni-Cr-NiAl diffusion triple clearly shows that Cr substitutes for both Ni and Al sites in beta-NiAl without a strong preference, which is also found not to be strongly composition dependent. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：935 / 938
页数：4
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