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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5000 h)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Den Broeder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10-15~10-16 cm2/s量级,且lnD与yW成线性关系,斜率为–1.82。
The interdiffusion behaviors of W coating and Mo alloy at 1600 ℃ were studied. The single crystal samples remained single crystal morphology after high temperature annealing (up to 5000 h), and the polycrystalline W grain boundaries were more perpendicular to the Mo surface direction. As a result of the line scan, the diffusion depth of W into the Mo matrix is larger than the diffusion depth of Mo into the W coating. According to the electron probe data, the interdiffusion coefficient of Mo-W is calculated by using Den Broeder method. The interdiffusion coefficient of Mo-W at 1600 ℃ is in the order of 10-15 ~ 10-16 cm2 / s, and lnD and yW are The linear relationship has a slope of -1.82.