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Low temperature ageing in equiatomic CuAu and Cu-Au-Pd ternary alloys

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Abstract

Low temperature ageing at 37° C in an equiatomic CuAu alloy and several Cu-Au-Pd ternary alloys in the CuAu-Cu0.6Pd0.4 pseudobinary system was studied. Age-hardening and a decrease in electrical resistivity were observed in the CuAu alloy and Cu-Au-Pd ternary alloys containing palladium up to 11 at. %. These phenomena were caused by the progress of long-range ordering in the CuAu l type superstructure with the aid of quenched-in excess vacancies. The rate of low temperature ageing decreased with increasing palladium concentration. This was presumed to be due to the increase in migration energy of a quenched-in vacancy with the palladium concentration.

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Authors and Affiliations

  1. Department of Dental Materials Engineering, Faculty of Dentistry, Kyushu University, 812, Fukuoka, Japan

    Takanobu Shiraishi & Michio Ohta

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  1. Takanobu Shiraishi
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  2. Michio Ohta
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Shiraishi, T., Ohta, M. Low temperature ageing in equiatomic CuAu and Cu-Au-Pd ternary alloys. J Mater Sci 24, 1049–1052 (1989). https://doi.org/10.1007/BF01148796

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  • DOI: https://doi.org/10.1007/BF01148796

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