Poor plasticity and small dimension are the main disadvantages of metallic glass. Diffusion bonding and composite fabrication between bulk metallic glasses (BMGs) and crystal metal are promising methods of addressing these disadvantages. In this study, the long‐term atomic diffusion behavior in the glass transition temperature (T_g) is investigated to avoid the formation of the crystalline phase at the interface. Diffusion‐coupled Ni/Zr₄₈Cu₃₆Ag₈Al₈ BMG is successfully fabricated by sputtering deposition. The diffusivities of Ni in Zr₄₈Cu₃₆Ag₈Al₈ metallic glass are calculated by using the thin‐film solution of Fick's second law. The diffusivities of Ni in Zr₄₈Cu₃₆Ag₈Al₈ alloy are functions of annealing temperature and time because of the dominant effect of the free volume. High‐resolution transmission electron microscopy results show that there are no crystals formed at the interface of diffusion‐coupled Ni/Zr₄₈Cu₃₆Ag₈Al₈ BMG below T_g, and mutual element diffusion occurs near the interface. Analysis of the diffusion behavior and microstructure indicates that the long‐term annealing below T_g can be applied to the diffusion bonding of BMG and crystal metal.

中文翻译：

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玻璃化转变温度下Ni / Zr48Cu36Ag8Al8界面原子扩散的研究

可塑性差和尺寸小是金属玻璃的主要缺点。散装金属玻璃（BMG）与晶体金属之间的扩散结合和复合材料制造是解决这些缺点的有前途的方法。在这项研究中，研究了在玻璃化转变温度（T _g）下的长期原子扩散行为，以避免在界面处形成结晶相。通过溅射沉积成功制造了扩散耦合的Ni / Zr ₄₈ Cu ₃₆ Ag ₈ Al ₈ BMG。Ni在Zr ₄₈ Cu ₃₆ Ag ₈ Al _8中的扩散率金属玻璃是使用菲克第二定律的薄膜溶液计算的。Ni在Zr ₄₈ Cu ₃₆ Ag ₈ Al ₈合金中的扩散率是退火温度和时间的函数，这是由于自由体积的主要影响。高分辨率透射电子显微镜结果表明，在T _g以下，扩散耦合的Ni / Zr ₄₈ Cu ₃₆ Ag ₈ Al ₈ BMG的界面上没有形成晶体，并且在界面附近发生了互元素扩散。对扩散行为和微观结构的分析表明，低于T _g的长期退火 可用于BMG与晶体金属的扩散结合。