Abstract:

 Objective  To investigate the influences of recasting on the mechanical properties of Au-Pt ceramic alloy. Methods  Au-Pt ceramic alloy samples were prepared and recast for 3 times without adding any new Au-Pt ceramic alloy. The tensile strength, 0.2% yield strength, percentage of elongation, flexural strength,  flexural modulus and Vickers hardness of each specimen were measured. Results  Being cast for different times, the Au-Pt ceramic alloy showed no significant differences on their tensile strength, 0.2% yield strength, percentage of elongation, flexural strength or Vickers hardness. The flexural modulus of the Au-Pt alloys being cast for 2 or 3 times was significantly higher than that of the alloys being cast for 1 time（P<0.05）. Conclusion  Au-Pt ceramic alloy can be recast for 3 times at least, without any decrease in the mechanical properties.

Key words: Au-Pt ceramic alloy, recast, physical properties