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Phase transformation behavior in a multipurpose dental casting gold alloy during continuous heating

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Abstract

Phase transformation in a multipurpose dental casting gold alloy during continuous heating was studied by electrical resistivity measurements, hardness tests, X-ray diffraction and scanning and transmission electron microscopy. The behavior can be explained by the following reaction sequences in the nodule: α1(FCC) + α2 (L12) → α1(fcc) + α2(L12) + β(L10), where fcc is face centred cubic. A discontinuous precipitation with very fine nodules contributed to the hardening and the growth produced the softening. This multipurpose gold alloy is characterized by the introduction of a PtZn ordered phase with L10 structure instead of a CuAu I phase.

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Authors and Affiliations

  1. Department of Dental Materials, College of Dentistry, Pusan National University, 1-10 Ami-dong, Seo-gu, Pusan, 602-739, Korea

    H. I. Kim & H. J. Seol

  2. Departments of Dental Materials Science and *Preventive Dentistry, Nagasaki University School of Dentistry, Nagasaki, 852, Japan

    K. Hisatsune, A. A. EI S. Sakrana, Y. Takuma & K. Kawasaki

Authors
  1. H. I. Kim
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  2. H. J. Seol
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  3. K. Hisatsune
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  4. A. A. EI S. Sakrana
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  5. Y. Takuma
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  6. K. Kawasaki
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Kim, H.I., Seol, H.J., Hisatsune, K. et al. Phase transformation behavior in a multipurpose dental casting gold alloy during continuous heating. Journal of Materials Science: Materials in Medicine 11, 61–66 (2000). https://doi.org/10.1023/A:1008941803630

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  • DOI: https://doi.org/10.1023/A:1008941803630

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