凝固条件对非晶合金的微观结构和性能的影响  

Influence of Solidification Conditions on Microstructure and Properties of Amorphous Alloys

作　　者：王爱民[1] 朱正旺[1] 付华萌[1] 李宏[1] 张海峰[1] 胡壮麒[1] 

机构地区：[1]中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016

出　　处：《中国材料进展》2010年第7期34-41,共8页Materials China

基　　金：国家重点基础研究发展计划资助(2006CB6054201)

摘　　要：采用不同凝固控制的方法,研究了凝固条件对非晶合金的微观结构、热稳定性以及力学性能的影响。研究表明,高温下铜模喷铸样品为完全非晶结构,而低温喷铸和电弧原位吸铸所制备的样品中存在着一些纳米量级的析出相。高温喷铸样品表现出非晶合金典型的脆断行为,但低温喷铸和原位电弧吸铸样品则表现出较高的强度和良好的塑性变形能力。高温甩带样品初始晶化温度高于相应的低温甩带样品,其长期热稳定性优于低温甩带样品,表明浇铸温度的升高增强了非晶合金的热稳定性。In this paper, the influence of solidification conditions on microstructure, thermal stability and mechanical properties of amorphous alloys are investigated by the method of controlling solidification process. It was shown that samples is prepared by high temperature injection （HT） exhibited pure amorphous structure, but some nanometer size crystal- lites existed in the samples is prepared by low temperature injection （LT） and in situ suction （SC）. The HT samples were typical brittleness, but the LT and SC samples exhibited high strength and good plastic deformation ability. The crystallization start temperature of high temperature melt spin samples were higher and its long term thermal stability was better than that prepared by low temperature melt spin, those shows the thermal stability of amorphous alloys were imnroved bv elevated casting temperature.

关 键 词：非晶合金 凝固条件 微观结构 力学性能 热稳定性 

分 类 号：TG244[金属学及工艺—铸造]