摘要
利用真空熔炼—离心铸造技术制备出ZCuSn10Zn2Fe合金试样,通过透射电镜和小角X射线散射研究了铁含量对合金凝固组织的影响,得出了纳米铁颗粒被界面俘获或推移的热力学条件及颗粒推移距离的表达式。ZCuSn10Zn2Fe合金在凝固过程中纳米Fe颗粒的大小随着Fe添加量的增加而增大;纳米颗粒被推移的距离随Fe添加量的增加和凝固速度的加快以及推移临界速度的降低而减小。理论分析与实验结果一致,并提出了改善原位自生复合材料组织均匀性的主要途径。
ZCul0Sn2ZnFe alloy was prepared by using vacuum melting and centrifugal casting technology. The effect of Fe mass fraction on microstructure in situ iron nanoparticle reinforced copper alloy was investigated by TEM and SAXS test. The thermal condition of particle capturlng/pushing and the expression of pushing distance of particles were given. The size of iron nanopartiele increases with increasing of Fe content; the pushing distance of iron nanoparticle reduces with increasing of the particle fraction and solidification rate, and decreasing the pushing critical rate during the solidification of ZCuSnl0Zn2Fe. The theoretical conclusion is in accordance with experimental results, and the main ways of improving the particle distribution in this composites are suggested.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第2期29-33,共5页
Transactions of Materials and Heat Treatment
关键词
纳米铁颗粒
金属凝固
推移距离
nano particles
metal solidification
particle pushing distance
