Ni对Mg-Cu-Tb非晶合金形成及力学性能的影响

中国有色金属学报, 2007, 17(2): 303-307.

Ni对Mg-Cu-Tb非晶合金形成及力学性能的影响

张青绒 ^1, , 李金山 ^2, , 王一川 ^3, , 寇宏超 ^4, , 胡锐 ^5, , 周廉 ^6, , 傅恒志 ^7,

1.西北工业大学,凝固技术国家重点实验室,西安,710072

2.西北工业大学,凝固技术国家重点实验室,西安,710072

3.西北工业大学,凝固技术国家重点实验室,西安,710072

4.西北工业大学,凝固技术国家重点实验室,西安,710072

5.西北工业大学,凝固技术国家重点实验室,西安,710072

6.西北工业大学,凝固技术国家重点实验室,西安,710072

7.西北工业大学,凝固技术国家重点实验室,西安,710072

基金项目: 西北工业大学科技创新计划资助项目英才计划支持资助项目陕西省科技攻关计划(2005k06-G2) 教育部跨世纪优秀人才培养计划

关键词：镁基非晶合金 , 非晶形成能力 , 热稳定性 , 力学性能

Effect of substitution of Ni for Cu on glass-forming ability and mechanical properties of Mg-Cu-Tb metallic glass alloys

利用熔体铜模喷铸法制备出直径为3 mm的Mg65Cu25-xNixTb10(x=0,5,10)非晶合金.利用X射线衍射、差热分析、压缩实验分析和扫描电镜分析了添加Ni元素对Mg-Cu-Tb非晶合金形成能力及力学性能的影响.研究表明:随着Ni含量的增加,合金的玻璃转变温度Tg增大;开始结晶温度Tx降低;过冷液相区宽度△Tx减小,约化玻璃转变温度Trg从0.562降至0.530,非晶形成能力逐渐降低.压缩实验结果表明:当Ni含量增加到5%时可以明显提高Mg-Cu-Tb-NJ非晶合金的断裂强度.

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