Using molecular dynamics simulations, we compare the creep properties of a homogeneous Cu₆₄Zr₃₆ metallic glass, a nanoglass with the same nominal composition, and a nanoglass-crystal composite, where the amorphous grain boundary phase has been reinforced with the high-temperature stable Cu₂Zr Laves phase. While the nanoglass architecture is successful at preventing shear band formation, which typically results in a brittle failure mode at room temperature and conventional loading conditions, we find that the high fraction of glass-glass grain boundary phase therein is not beneficial to its creep properties. This can be amended by reinforcing the glass-glass interphase with a high-temperature stable crystalline substitute.

使用分子动力学模拟，我们比较了均相的Cu ₆₄ Zr ₃₆金属玻璃，具有相同标称组成的纳米玻璃和纳米玻璃-晶体复合材料的蠕变性能，其中非晶态晶界相已通过高温稳定剂增强。 Cu ₂ Zr Laves相。尽管纳米玻璃结构成功地防止了剪切带的形成，而剪切带的形成通常会导致室温和常规载荷条件下的脆性破坏模式，但我们发现其中高比例的玻璃-玻璃晶界相不利于其蠕变性能。这可以通过用高温稳定的结晶替代物增强玻璃-玻璃中间相来修正。