采用X射线衍射仪、扫描电镜和能谱仪等试验方法,研究了Ag-30Au-15Pd-11Cu和Ag-23Pd-11Au-9Cu两种牙科贵金属铸造合金的铸态组织、相结构和相成分.结果表明,2种合金均由面心立方结构的富银富钯固溶体α1和富铜固溶体α2两相组成,而金在两相中是均匀分布的.Ag-30Au-15Pd-11Cu合金的铸态显微组织是先共晶的等轴晶α1固溶体加少量片层状(α1+α2)共晶体,Ag-11Au-23Pd-9Cu合金的铸态显微组织是片层状(α1+α2)共晶体加少量先共晶的α1固溶体.
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