Thermophysical properties of Zr-Cu-Al metallic glasses during crystallization |
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Authors: | Hideaki Nagai Mikito Mamiya |
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Institution: | a Thin Film Processing Group, Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japanb Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan |
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Abstract: | The crystallization behavior of Zr-Cu-Al metallic glasses was studied using thermophysical property measurements. When the Zr content of Zr-Cu-Al metallic glass decreased from 65 at.% to 45 at.%, the thermal conductivity gradually increased and the maximum value obtained was the composition of Zr:Cu:Al = 50:39.3:10.7(at.%). These metallic glasses were not crystallized upon heat treatment below the glass transition temperature Tg, and the thermophysical properties of these metallic glasses were almost constant. In contrast, these metallic glasses started to crystallize upon heat treatment above Tg after a certain derived time, and their thermal conductivity increased with the crystallinity of the metallic glass. |
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Keywords: | Zr-Cu-Al metallic glass Thermophysical properties Hot-disk method Crystallization Heat treatment |
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