Microstructure change in commercial dental Ag-Pd-Cu-Au alloy induced via re melting

Abstract

In our previous study, we examined the composition and method of heat treatment were in concordance, hardness increased in as-received materials and decreased in Liquid Rapid Solidification treatment (LRS) alloys. It was suggested then, that the inherently &beta phase in microstructures played a prominent role in the differences observed. In the present study, we re-melted as-received and LRS materials and examined hardness after solution treatment. Additionally, the presence/absence of the &beta phase was investigated. We found that &beta phase educes under slow solidification speeds. Additionally, even after high solution treatment at 1123K, the &beta phase does not solidify.