Cu-25Ni-25Ag三元合金在600℃和700℃空气中的氧化  

Oxidation of Cu-25Ni-25Ag alloy at 600℃ and 700℃ in air

作　　者：赵泽良[1] 牛焱[1] F.Gesmundo 吴维 

机构地区：[1]中国科学院金属研究所 [2]Universita di Genova Fieradel Mare

出　　处：《中国有色金属学报》2001年第2期183-186,共4页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目! (5 972 5 10 1)和 (5 98710 5 0 )

摘　　要：研究了Cu 2 5Ni 2 5Ag合金在 6 0 0℃和 70 0℃空气中的氧化。合金由富Ag的α相与Cu Ni固溶体 β相组成。氧化速率大致服从抛物线规律 ,除短时间的加速氧化外 ,随着氧化的进行氧化速率逐渐减小。尽管存在Ag和Ni,但合金成膜速率与纯Cu的相近。在不同温度下合金都形成了外层为CuO ,内层为Cu2 O ,NiO和Ag颗粒组成的复杂氧化膜。同时 ,氧化膜最前沿的Cu Ni固溶体颗粒仅表面部分氧化 。The oxidation of Cu 25Ni 25Ag alloy at 600?℃ and 700?℃ in air was studied. The alloy contains a mixture of silver rich α phase and copper nickel solid solution β phase. The scaling rates of the alloy are substantially similar to that of pure copper, in spite of the presence of silver and NiO in the scales. Complex scales are formed with outermost layer of copper oxides and inner region of a mixture of Cu 2O, NiO and a number of silver metal particles. The particles of β phase in the innermost scale region are oxidized only around their surface, leaving an unoxidized core surrounded by NiO. [

关 键 词：三元合金 Cu-Ni-Ag 双相合金 氧化 铜合金 

分 类 号：TG146.11[一般工业技术—材料科学与工程] TG172.82[金属学及工艺—金属材料]