Synthesis of Nb/Nb5Si3 in-situ composites by mechanical milling and reactive spark plasma sintering

被引：22
|
作者：
Ma, CL [1 ]
Kasama, A
Tan, Y
Tanaka, H
Tanaka, R
Mishima, Y
Hanada, S
机构：
[1] Japan Ultrahigh Temp Mat Res Inst, Ube, Yamaguchi 7550001, Japan
[2] Tokyo Inst Technol, Dept Mat Sci & Engn, Yokohama, Kanagawa 2268502, Japan
[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源：
MATERIALS TRANSACTIONS JIM | 2000年 / 41卷 / 06期
关键词：
in-situ composite; powder metallurgy; reactive spark plasma sintering; arc melting; niobium silicide; niobium solid solution; microstructure; strength;
D O I：
10.2320/matertrans1989.41.719
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nb-ss/Nb5Si3 in-situ composites (Nb-16 mol%Si) for high-temperature structural applications were synthesized by reactive spark plasma sintering (RSPS), mechanically milled (MM) Nb-Si powders. Microstructures were characterized by OM, SEM, XRD and EPMA, and the mechanical properties of the composites were investigated by microhardness and compression tests. This consolidation process can produce the compacts of Nb-ss/Nb5Si3 in-situ composites having equiaxed grain microstructures and a nearly full density when RSPS is carried out above the melting point of silicon. The RSPS in-situ composites exhibit large compressive ductility at room temperature and considerably high strength at elevated temperatures.
引用
收藏
页码：719 / 726
页数：8
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