✍ Scribed by P.Y. Lee; W.C. Liu; C.K. Lin; J.C. Huang
No coin nor oath required. For personal study only.
Mg 45 Y 15 Cu 40 (numbers indicate at.%) metallic glass powders were prepared by the mechanical alloying of pure Mg, Y, and Cu after 10 h of milling. The thermal stability of these Mg 45 Y 15 Cu 40 amorphous powders was investigated using the differential scanning calorimeter (DSC). T g , T x , and T x are 456, 491, and 35 K, respectively. The as-milled Mg 45 Y 15 Cu 40 powders were then consolidated by vacuum hot pressing into disk compacts with a diameter and thickness of 10 and 1 mm, respectively. This yielded bulk Mg 45 Y 15 Cu 40 metallic glass with nanocrystalline precipitates homogeneously embedded in a highly dense glassy matrix. The pressure applied during consolidation can enhance thermal stability and prolong the existence of amorphous phase within Mg 45 Y 15 Cu 40 powders.
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