Abstract
IN an earlier letter1 one of us (W. F. B.) tried to explain the discrepancies which exist concerning the plasticity of bismuth. It was confirmed that crystals obtained by different methods behave quite differently; for example, that soft crystals, that is, crystals which slip in tensile tests at room temperature, occur among those made in air (Czochralski method), whereas only hard crystals are obtained in vacuo (Bridgman method). Since the crystals made under atmospheric pressure were found to contain some gas, it was suggested that the gas was responsible for their softness. Hard crystals made in vacuo were found to slip in compression tests at room temperature and in tensile tests at higher temperatures2. Experiments by Gough3 and by Andrade and Roscoe4 seem to support these findings.
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References
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Proc. International Conference on Physics, 2, 180; 1934.
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ibid., 2, 176.
Z. Phys., 36, 759; 1926.
J. Inst. Metals, 48, 227; 1932.
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BERG, W., SANDLER, L. Plasticity of Bismuth. Nature 136, 915 (1935). https://doi.org/10.1038/136915a0
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DOI: https://doi.org/10.1038/136915a0
