Chemical synthesis and properties of nanocrystalline Cu-Fe-Ni alloys

被引：22
|
作者：
Stolk, J [1 ]
Manthiram, A [1 ]
机构：
[1] Univ Texas, Texas Mat Inst, Austin, TX 78712 USA
来源：
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 1999年 / 60卷 / 02期
基金：
美国国家科学基金会;
关键词：
synthesis; properties; nanocrystalline Cu-Fe-Ni alloys;
D O I：
10.1016/S0921-5107(99)00022-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The chemical reduction of Cu2+, Fe3+, and Ni2+ ions with sodium borohydride in aqueous solution followed by heat treatments at 300-900 degrees C in a H-2 atmosphere was investigated to obtain nanocrystalline Cu-Fe-Ni, which may have low thermal expansion and enhanced thermal and electrical conductivities. The samples were characterized by X-ray diffraction, optical microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, thermomechanical analysis, and electrical conductivity measurements. Thermal conductivity uas estimated using the Wiedemann-Franz law. Sintering lead to the formation of a Cu-rich phase and a gamma-(Fe, Ni) Invar phase. The growth and stability of the Cu and gamma-(Fe, Ni) Invar phases and the effects of composition on the properties of Cu-Fe-Ni alloys were investigated. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：112 / 117
页数：6
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