Abstract
The tarnish test, wear test and morphological, compositional investigations were performed using Ion-plated specimens which plated Type IV gold alloy to non-precious alloys. Results 1. The resistance to tarnish of the Ag-In and Ag-Cu system alloys was improved by this Ion-plating preparation. 2. The amount of wear of the Ion-plated specimen was large to Type IV gold alloy, but small to the porcelain and enamel. 3. The amount of wear of Type IV gold alloy casts and the Ag-In system alloy was great to the Ion-plated specimen, while that of Ni-Cr system alloy, porcelain and enamel was small. 4. The structure of the Ion-plated film consisted of very fine crystals. 5. The composition of the Ion-plated film varied as compared with that of the original alloy, and the distribution of the component elements in the film was not uniform. It was assumed that the reason for this is the difference in the evaporation velocities of the component elements.
