添加少量Ni元素对Mg-Cu-Gd块体金属玻璃形成能力的影响  

Effect of Small Ni Addition on Glass-forming Ability of Mg-Cu-Gd Bulk Metallic Glass

作　　者：尹健[1] 周志坚[1] 刘毅[1] 漆志鹏[1] 

机构地区：[1]南昌航空大学航空制造工程学院,江西南昌330063

出　　处：《铸造技术》2012年第10期1142-1144,共3页Foundry Technology

基　　金：国家自然科学基金资助项目(51101084);江西省科技厅资助项目(20112BDH80022)

摘　　要：采用铜模喷铸法研究了少量添加元素Ni对Mg-Cu-Gd合金的玻璃形成能力的影响。结果表明,Ni的原子分数为2.85%~4.05%的Mg-Cu-Ni-Gd合金形成块体金属玻璃的临界尺寸可达6~8 mm。少量Ni元素会稍降低Mg-Cu-Gd合金的玻璃形成能力,这可主要归因于Ni元素会促进Mg-Cu-Gd非晶形成竞争相Mg2Cu形成以及降低合金液相稳定性。The effect of a small addition of Ni on the glass-forming ability（GFA） of Mg-Cu-Gd bulk metallic glass（BMG） was investigated using copper mould casting.The results show that the GFA of the Mg-Cu-Ni-Gd bulk metallic glasses with the content of 2.85at.%~4.05at.% Ni could reach 6~8 mm.A small Ni addition slightly decreased the GFA of the Mg-Cu-Gd BMG.It was demonstrated that a small Ni addition could benefit the formation of the competing phase Mg2Cu and lower the stability of liquid phase,which may be the main reason for the decreasing GFA of the Mg-Cu-Ni-Gd BMG.

关 键 词：金属玻璃 镁合金 玻璃形成能力 

分 类 号：TG139.8[一般工业技术—材料科学与工程]