Mechanism of Bi Precipitation in Sn65.4Bi34.6 Eutectic System
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概要
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The macroscopic Bi precipitation process in highly heterogeneous Sn65.4Bi34.6 eutectic alloy is investigated on an atomic scale by positron annihilation spectroscopy. High concentration of vacancy-sized free volumes are located at interfaces among short-range ordered phases. Along with Bi precipitation, the chemical surroundings around the free volumes are changed from Bi- to Sn-rich environment and the concentration of free volume increases. The results demonstrate that free volume-intermediated atomic diffusion at the interfaces is responsible for macroscopic Bi precipitation in Sn65.4Bi34.6.
- 2009-02-25
著者
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KOBAYASHI Yoshinori
National Chemical Laboratory for Industry
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Nakata Masataka
Department Of Astronomy And Earth Science Tokyo Gakugei University
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Murakami Hideoki
Department Of Metallurg And Marial Science Faculty Of Engineering University Of Tokyo
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Sato Kiminori
Department Of Electrical Communication Faculty Of Engineering Tohoku University
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Fujimoto Koichiro
Department of Astronomy and Earth Sciences, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan
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Murakami Hideoki
Department of Astronomy and Earth Sciences, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan
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Nakata Masataka
Department of Astronomy and Earth Sciences, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan
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