Abstract
By using the technique previously reported, different type alloys were joined by simultaneous casting into a single mold separated by a platinum foil. The image of structures around the joined area of 20K gold alloy, platinum gold alloy and Au-Ag-Pd alloy were observed.
In this study, the joined areas of KIK, Au-Ag-Pd alloy and Ni-Cr alloy were observed under LM and SEM and analysed by EPMA.
KIK was fused to the platinum foil without segregation like the 20K gold alloy or platinum gold alloy as observed in a previous study. Au was diffused into platinum foil with the diffused depth of 1 μm. In the case of Au-Ag-Pd alloy, the segregation was observed under LM and SEM. The diffused element into the platinum foil was Cu with the diffused depth of about 6 μm. In the case of Ni-Cr alloy, the diffused layer was also observed. The diffused elements into the platinum foil were Mn, Ni and Cu with the maximum depth of about 18 μm.
Platinum was also diffused into these alloys with the maximum depth of about 100 μm.
