Surface Alteration of Sandblast-treated Titanium and 12%Au-Ag-Pd Alloy

Abstract

Sandblast-treated titanium (Ti) and 12% Au-Ag-Pd (12Au) alloys underwent observation by laser microscopy and elemental measurement by an EPMA. The whole surface of the specimen was respectively treated with a pencil type sandblaster, glass beads, alumina and carborundum for 10, 30, and 90 seconds. Glass bead-treated Ti and 12Au surfaces showed roundish irregularities. Alumina- and carborundum-treated surfaces showed sharp irregularities. Carborundum showed the greatest elimination depth for 30 seconds, and alumina showed the greatest elimination depth for 90 seconds. Both elimination depths were greater with the extension of processing time. Surface roughness (Ra) became lower for glass beads and greater for alumina and carborundum, compared with an untreated surface. Mapping images showed the constituent elements of glass beads, alumina and carborundum powder on respective treated surfaces.