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

研究了热轧和液态快速凝固两种工艺制备的Ag-20Pd-14.5Cu-12Au合金的显微组织对其机械强度的影响。研究结果表明：LRS材料经固溶处理后，组织转变为单一的α相。LRS材料和经ST处理的LRS材料的硬度相对小于相同处理的AS材料和AS材料的硬度。由这一结果可知，作为Ag-20Pd-14.5Cu-12Au组成相的α、α1和α2相的固溶硬化效应低于β‘相的析出硬化效应。因此，Ag-20Pd-14.5Cu-12Au合金的独特硬化，似乎是由于在ST过程中增强了β‘相的析出。

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.