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Nucleation in undercooled Ag-Ge alloys

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Abstract

Experiments with bulk samples of Ag-Ge alloys have shown that the silver solid solution will undercool ∼11°C belowT e in the presence of primary germanium. These data agree with the results of Sundquist and Mondolfo.1 On the other hand, a modified single crystal substrate method similar to that used by Wagner2 has shown that large droplets (0.25 to 2.5g) of hypereutectic Ag-Ge alloy melted on a single crystal of germanium undercooled to a maximum of 56°C belowT e. This result is closer to Wagner’s data and in apparent conflict with the bulk sample results and those of Sundquist and Mondolfo.1 An explanation is proposed for this discrepancy.

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References

  1. B. Sundquist and L. F. Mondolfo:Trans. TMS-AIME, 1961, vol. 221, p. 157.

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  2. R. S. Wagner:AIME Conf. Advan. Electron. Mater., 1962, vol. 19, p. 239.

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Authors and Affiliations

  1. Australian Mineral Development Laboratories, Frewville, S. A. Australia

    G. L. F. Powell

  2. Thayer School of Engineering, Dartmouth College, Frewville, S. A. Australia

    G. A. Colligan (Associate Dean)

Authors
  1. G. L. F. Powell
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  2. G. A. Colligan
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Formerly with the Thayer School of Engineering, Dartmouth College, Hanover, N. H.

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Powell, G.L.F., Colligan, G.A. Nucleation in undercooled Ag-Ge alloys. Metall Trans 2, 849–852 (1971). https://doi.org/10.1007/BF02662745

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