摘要
以Fe、Si粉为原料,添加微量Cu,采用场激活的方法一步完成β相FeSi2的合成、致密和退火。本文分析研究了微量Cu对材料合成速度和显微组织的影响,结果表明:微量Cu能够显著提高材料的合成速度;Cu以白色富集区的形式存在;退火时间对ε相的残留量没有显著影响,但能使长条状的Si富集区的长径比发生变化。
β-phase FeSi2 was synthesized by field activated method from Fe and Si powder mixture with small addition of Cu. The synthesis, solidification and heat treatment are completed in one step by this method. This paper investigated the effect of small addition Cu on synthesis rate and microstructure. The results show that copper can dramatically increase the phase transformation rate. Holding time do not influence the amount of remained Ε phase, but finger shape of Si rich regions changes with the increase of holding time.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2004年第4期357-360,共4页
Nuclear Power Engineering
关键词
β相FeSi2
场激活法
微量Cu
退火时间
Annealing
Copper
Iron alloys
Metallographic microstructure
Silicon alloys
Solidification
Thermoelectricity
