Effect of high pressure on metastable and stable intermediate hcp phases formed in the Ag-17at%Ge alloy |
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| Authors: | Yasuo Fujinaga Shinya Hashimoto Kazuaki Fukamichi Takumi Kikegawa |
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| Affiliation: | 1. Institute for Materials Research, Tohoku University , Serzdai, 980, Japan;2. Japan Atomic Energy Research Institute, Tokai Research Establishment , Tokaimura in Ibaragi Prefecture, 319-11, Japan;3. Department of Materials Science Faculty of Engineering , Tohoku University , Sendai, 980, Japan;4. Photon Factory, National Laboratory for High Energy Physics , Tsukuba, 305, Japan |
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| Abstract: | Abstract A metastable hexagonal close-packed (hcp) phase obtained by rapid quenching from the melt has been compressed to 5.7 GPa and annealed up to 1023 K. The axial ratios (c/a) of the hcp structure at the initial state, the stable state annealed under high pressure (5.7 GPa, 673 K) and the quenched state from high pressure and high temperature condition are 1.630, 1.635 and 1.628, respectively. The volume reduction of the hcp structure by application of high pressure gives rise to increase the c/a ratio, which corresponds to an apparent reduction in the number of valence electrons per atom (e/a) in the Hume-Rothery alloys. |
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| Keywords: | High pressure phase metastable state silver-germanium system electron atom ratio |
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