Bulk glassy Cu-based alloys with a large supercooled liquid region of 110 K
Bulk glassy Cu-based alloys with a large supercooled liquid region of 110 K
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DOI：
10.1063/1.1613813
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发表时间：
2003-09
期刊：
影响因子：
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通讯作者：
A. Inoue;Wei Zhang
中科院分区：
文献类型：
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作者：
A. Inoue;Wei Zhang
Cu50Hf45Al5玻璃合金用5%Ag替代Cu，可显著提高过冷液的抗结晶稳定性。Cu45Hf45Al5Ag5的过冷液区高达110 K。过冷液体区域的扩大是由于结晶温度的升高，伴随着初生晶相的变化。Ag加入的有效性被解释为由于对结晶反应进程的远程原子重排的延迟。第四系成分的选择使我们能够形成直径达3毫米的大块玻璃合金。含5% ag合金的杨氏模量为119 GPa，抗压断裂强度为2220 MPa。
The replacement of Cu by 5%Ag for Cu50Hf45Al5 glassy alloy was found to increase significantly the stability of supercooled liquid against crystallization. The supercooled liquid region reached as large as 110 K for Cu45Hf45Al5Ag5. The extension of the supercooled liquid region is due to an increase in the crystallization temperature, accompanying the change in the primary crystalline phases. The effectiveness of Ag addition was interpreted to result from the retardation of long-range atomic rearrangements for the progress of crystallization reaction. The selection of the quaternary composition enabled us to form bulk glassy alloys with diameters up to 3 mm. The Young’s modulus and compressive fracture strength of the 5%Ag-containing alloy are 119 GPa and 2220 MPa, respectively.