Abstract
Tensile strength at room temperature and 950℃, flexure at 1, 000℃ and hardness of Vickers between room temperature and 900℃ along with sag resistance were evaluated on six commercial and a home-made Au-Pt-Pd alloys for porcelain-fused-to-metal restorations.The results showed that tensile strength and flexure were correlated to each other and also that hardness and flexure were correlated.All of the properties examined for the home-made alloy were found to be inferior to those of the commercial alloys.The present results suggest that the tensile strength and hardness could be used in estimating the sag resistance of all types of alloys employed.Further, the finite element stress analysis for self-weight sagging of a two-point supported beam substantiated the present experimental results in that flexure(sag)is dependent on the resistance to tensile force.
