Creep Deformation of a Cu-Zr Nanoglass and Interface Reinforced Nanoglass-Composite Studied by Molecular Dynamics Simulations
C Kalcher and O Adjaoud and K Albe, FRONTIERS IN MATERIALS, 7, 223 (2020).
Using molecular dynamics simulations, we compare the creep properties of a homogeneous Cu(64)Zr(36)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.
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