Influence of sintering temperature on microstructures of Nb/Nb5Si3 in situ composites synthesized by spark plasma sintering

被引：46

作者：

Chen, Z ^{[1
]}

Yan, YW ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, State Key Lab Die Technol, Wuhan 430074, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 413卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

spark plasma sintering; Nb/Nb5Si3; composites; sintering temperature; microstructure;

D O I：

10.1016/j.jallcom.2005.06.005

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：

Taking the use of Nb and Si elemental powders as raw materials, Nb/Nb5Si3 Composites were successfully fabricated by a spark plasma sintering (SPS) technology. The influence of sintering temperatures on microstructures of the synthesized composites was mainly investigated. The results show that there exists a critical sintering temperature T, (1400 degrees C) in the synthesis of Nb/Nb5Si3 composites by SPS technology. When sintering temperature is lower than T-c, an intermediate Nb3Si phase is produced in the fabricated samples. Moreover. the relative density of the samples is lower. Only if the sintering temperature is higher than T,. the intermediate Nb3Si phase is thoroughly eliminated, Nb particles become a finer size and desirable Nb/Nb5Si3 composites up to 99.59% theoretic density are achieved. (c) 2006 Published by Elsevier B.V.

引用

页码：73 / 76

页数：4

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