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Precipitation behavior of Ag–Pd–In dental alloys

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Abstract

Age-hardening characteristics and precipitation behavior of Ag–25%Pd–3%In–1%Zn–0.5%Ir alloy were investigated in detail by means of hardness testing, X-ray diffraction, electron microscopy and resistivity measurement. The solution treating could be accomplished at 980 °C and the aging in the temperature range from 950 to 850 °C occurred by continuous precipitation. The aging in the temperature range from 850 to 450 °C occurred first, forming GP-zones with a hardness increase and then in overaging stage by forming discontinuous precipitation, which consisted of lamellae of solute (Pd, In, Zn) depleted Ag-rich phase and (Pd,Ag)3(In,Zn) intermetallic phase. The hardness increased very fast to its peak in 10 min during aging at temperatures between 450 and 550 °C.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusung-Dong, Yusung-Gu, Taejon, 305-701, South Korea

    Y. C. Suh

  2. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusung-Dong, Yusung-Gu, Taejon, 305-701, South Korea

    Z. H. Lee

  3. Department of Dental Materials Engineering, Faculty of Dentistry, Kyushu University, 3-1-1 Maedashi, Higashi-ku, Fukuoka, 812-82, Japan

    M. Ohta

Authors
  1. Y. C. Suh
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  2. Z. H. Lee
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  3. M. Ohta
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Suh, Y.C., Lee, Z.H. & Ohta, M. Precipitation behavior of Ag–Pd–In dental alloys. Journal of Materials Science: Materials in Medicine 11, 43–48 (2000). https://doi.org/10.1023/A:1008937702722

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