摘要
对w涂层和Mo合金在1600℃下的互扩散行为进行了研究，单晶样品长期（最长5000h）高温退火后仍然保持单晶形貌，多晶材料w晶界多垂直于Mo表面方向。由线扫描结果：w向Mo基体的扩散深度大于Mo向w涂层的扩散深度。根据电子探针数据使用DenBroeder方法对Mo．W的互扩散系数进行了计算，1600℃时Mo-W的互扩散系数在10^-15-10^-16cm2／s量级，且lnD与yw成线性关系，斜率为-1．82。
The interdiffusion behavior of W coating with Mo alloy at 1600 ℃ was studied, the monocrystal samples remained monocrystal feature without after long time （maximum of 5000 h） annealed, and grain boundary of polycrystal W was perpendicular to the surface of Mo. As the result of line scan of SEM： the diffusion depth of W in Mo was larger than that of Mo in W. The interdiffusion coefficient D of monocrystal Mo-W system was calculated with EPMA datas by the method of Den Broeder, and as the result： D was 10^-15 10^-16 cm2/s at 1600 ℃, lnD was linear relationship inverse of concentration of W, and the slope was - 1.82.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2014年第4期932-935,共4页
Rare Metal Materials and Engineering
关键词
Mo-Nb单晶
W涂层
互扩散系数
Mo-3Nb monocrystal, W coating, interdiffusion coefficient
