摘要
为了进一步提高铜基大块非晶合金的玻璃形成能力及力学性能,采用添加微量Al元素的方法对块体非晶合金Cu52.5Ti30Zr11.5Ni6进行了成分优化.热分析与X射线衍射结果显示,随着微量Al的添加,液相线温度从非晶合金Cu52.5Ti30Zr11.5Ni6的1150 K逐步降低到Cu50.5Ti30Zr11.5Ni6Al2的1134 K,临界直径相应的从5 mm提高到6 mm.大块非晶Cu50.5Ti30Zr11.5Ni6Al2的压缩断裂强度达到2286 MPa,比经典的铜基非晶合金Cu47Ti34Zr11Ni8提高约100 MPa,表明微量Al的添加在有效提高玻璃形成能力的同时,强度也略有提高.
The effects of minor Al substitution for Cu on the glass-forming ability and mechanical properties have been studied for Cu52.5-xTi30Zr11.5Ni6Alx（x =0, 1, 1.5,2） alloys. Thermal analysis and X-Ray exami- nation show that minor Al addition decreases the liquidus temperature from 1150 K at x = 0 to 1134 K at x = 2, and increases the critical size of amorphous samples from 5 mm to 6 rnm in diameter correspondingly. The bulk amorphous Cu50.5Ti30Zr11. 5Ni6Al2 exhibits high compressive fracture strength of 2286 MPa, which is about 100 MPa superior to well known Cun7Ti34Zr11Ni8 alloy. It can be concluded that minor Al addition to amorphous Cu52.5Ti30Zr11.5Ni6 alloy can improve its glass-forming ability with enhanced fracture strength.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2008年第6期794-797,共4页
Materials Science and Technology
基金
教育部新世纪优秀人才支持计划资助项目
关键词
大块非晶合金
玻璃形成能力
压缩断裂强度
bulk amorphous alloy
glass-forming ability
compressive fracture strength
