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Intermetallic embrittlement of thin unsupported tin/copper specimens

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Abstract

Thin, unsupported vacuum-cast tin samples were prepared and, after half of the samples were coated with a thin layer of evaporated copper, stressed to failure using a specialized tensile testing apparatus. The samples were examined optically and by analytical scanning and transmission electron microscopy. Samples coated with copper exhibited very different mechanical behavior than did the uncoated tin samples which exhibited simple ductile behavior. Postfailure examination of the specimens shows that the differences in mechanical behavior are not due to the copper coating, but, in fact, due to copper-tin intermetallics formed within the bulk of the tin.

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Authors and Affiliations

  1. Georgia Institute of Technology, 30332-0800, Atlanta, GA

    G. B. Freeman, B. R. Livesay, Yi Xu & E. G. O’Neil

  2. MVA, Inc., 30093, Norcross, GA

    J. Bradley

Authors
  1. G. B. Freeman
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  2. B. R. Livesay
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  3. J. Bradley
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  4. Yi Xu
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  5. E. G. O’Neil
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Freeman, G.B., Livesay, B.R., Bradley, J. et al. Intermetallic embrittlement of thin unsupported tin/copper specimens. J. Electron. Mater. 23, 919–924 (1994). https://doi.org/10.1007/BF02655365

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  • DOI: https://doi.org/10.1007/BF02655365

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