高压下Co在Zr_(46.75)Ti_(8.25)Cu_(7.5)Ni_(10)Be_(27.5)大块金属玻璃过冷液相区中的扩散  

Diffusion of Co in Zr_(46.75)Ti_(8.25)Cu_(7.5)Ni_(10)Be_(27.5) bulk metallic glass in supercooled liquid region under high pressure

作　　者：王秀英[1] 孙力玲[2] 刘日平[1] 姚玉书[2] 张君[2] 王文魁[1] 

机构地区：[1]燕山大学河北省亚稳材料制备技术与科学重点实验室,秦皇岛066004 [2]中国科学院物理研究所,北京100080

出　　处：《物理学报》2004年第11期3845-3848,共4页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :5 0 1710 77;10 2 990 40和 10 0 0 40 14 )资助的课题~~

摘　　要：通过离子注入结合二次离子质谱分析方法 ,研究了高压下Co在Zr4 6 .75Ti8.2 5Cu7.5Ni1 0 Be2 7.5大块金属玻璃过冷液相区中的扩散行为 .在 6 0 3K时 ,Co在Zr4 6 .75Ti8.2 5Cu7.5Ni1 0 Be2 7.5大块金属玻璃中的扩散系数随压力的增大而增大 ,其扩散激活体积ΔV =- 1.2 36Ω ,Ω是合金的平均原子体积 .结果表明 ,在热平衡状态下Co在Zr4 6 .75Ti8.2 5Cu7.5Ni1 0Be2 7.Diffusion of Co in Zr 46.75Ti 8.25Cu 7.5Ni 10Be 27.5 bulk metallic glass under high pressure is investigated in supercooled liquid region by ion implantation combined with secondary ion mass spectroscopy.Before implantation of Co atoms,the amorphous samples were annealed and relaxed in supercooled liquid region.Diffusion coefficients of Co at 603K in the relaxed samples are found to increase with increasing pressure.And the activation volume for diffusion is obtained to be -1.236Ω,where Ω is the mean atomic volume of the alloy.The result shows that diffusion of Co in this case is in an interstitial way.

关 键 词：过冷液相区 大块金属玻璃 扩散系数 合金 离子注入 扩散行为 间隙 高压 机理 研究 

分 类 号：TG139.6[一般工业技术—材料科学与工程]