Brand-new development of dental low carat noble metal alloy by unique strengthening mechanism

研究了热轧工艺制备的Ag-20 Pd-14.5Cu-12 Au合金（AS材料）和液态快速凝固（LRS）工艺制备的Ag-20 Pd-14.5Cu-12 Au合金（LRS材料）的显微组织对力学强度的影响。研究结果表明：LRS材料经固溶处理（ST）后，其显微组织变为单一的α相; LRS材料和经ST处理的LRS材料的硬度相对小于AS材料和经相同处理的AS材料的硬度。根据该结果，作为Ag-20 Pd-14.5Cu-12 Au的组成相的α、α 1和α 2相的固溶硬化的效果低于β ′相的沉淀硬化的效果。因此，Ag-20 Pd-14.5Cu-12 Au的独特硬化似乎是因为在ST期间β '相的沉淀增强而发生的。

The purpose is to investigate the effect of microstructure on the mechanical strength of Ag-20Pd-14.5Cu-12Au fabricated by hot rolling process (AS material) and liquid rapid solidification (LRS) process (LRS material). The following results were obtained.The microstructure of LRS material becomes single alpha phase through solution treatment (ST). The hardness of LRS material and LRS material subjected to ST are relatively smaller than those of AS material and AS material subjected to the same treatment. From this results, the effect of solid solution hardening of alpha, alpha 1, and alpha 2 phases, which are constitutional phases of Ag-20Pd-14.5Cu-12Au, is lower than that of precipitation hardening of beta' phases. The unique hardening of Ag-20Pd-14.5Cu-12Au, therefore, it seems to occur because the precipitation of beta' phases are enhanced during ST.