Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Age-Hardening Behavior and Structural Changes in a Commercial Dental Au-Ag-Cu-Pd Alloy

  • Kim, Hyung-Il (Department of Dental Materials, College of Dentistry, Pusan National University) ;
  • Park, Seok-Kyu (Department of Dental Materials, College of Dentistry, Pusan National University)
  • Published : 1994.12.01
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Abstract

The age-hardening behavior and the structural changes in a commercial dental Au-Ag-Cu-Pd alloy were investigated by means of hardness test, optical and scanning electron microscopic observation, energy dispersive spectroscopy and X-ray diffraction study. The drastic reduction in hardness by prolonged aging occurred after a rapid increase in hardness at the initial stage by the isothermal aging at $350^{\circ}C$. This softening was due to the broad precipitates formation of the lamellar structure which was composed of the f.c.t. AuCu I ordered f.c.t. phase containing Pd and the f.c.c. Ag-rich $\alpha$1 solid solution f.c.c.phase containing Au.

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References

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