Glass-forming Ability and Corrosion Resistance of Zr—Cu—Al—Co Bulk Metallic Glass  

作　　者：W.Zhou W.P.Weng J.X.Hou 

机构地区：[1]Shagang School of Iron and Steel, Soochow University

出　　处：《Journal of Materials Science & Technology》2016年第4期349-354,共6页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No. 51401139);the Basic Research Program of Jiangsu Province (No. BK20130304)

摘　　要：Investigations were carried out to examine the effects of Co addition on the glass-forming ability （GFA） and corrosion resistance of Zr46Cu46AI8 bulk metallic glass in chloride-containing solution. It is found that the GFA of （Zr46Cu46Al8）100-xCox （x = 0, 1, 2, and 4 at.%） alloys reduces with the increase in Co content and correlates well with the parameters, such as the supercooled liquid region width ATx, the reduced glass transition temperature Trg and γ. The corrosion resistance is however found to be enhanced with the in- crease in Co concentration. The addition of Co causes the enrichment of Zr and Al, but depletes Cu in the surface films, which effectively enhances the corrosion potential and lowers the corrosion current density.Investigations were carried out to examine the effects of Co addition on the glass-forming ability （GFA） and corrosion resistance of Zr46Cu46AI8 bulk metallic glass in chloride-containing solution. It is found that the GFA of （Zr46Cu46Al8）100-xCox （x = 0, 1, 2, and 4 at.%） alloys reduces with the increase in Co content and correlates well with the parameters, such as the supercooled liquid region width ATx, the reduced glass transition temperature Trg and γ. The corrosion resistance is however found to be enhanced with the in- crease in Co concentration. The addition of Co causes the enrichment of Zr and Al, but depletes Cu in the surface films, which effectively enhances the corrosion potential and lowers the corrosion current density.

关 键 词：Bulk metallic glassCo-additionGlass-forming abilityCorrosion resistance 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TQ171.71[金属学及工艺—合金]