Internal oxidation of an Ag-1.3 at.% Te alloy

The internal oxidation of Ag-1.3 at.% Te was studied at 750,800, and 830 degreesC in pure oxygen (1 atm). The internal oxidation tinder such high oxygen pressure resulted information of two different types of oxide particles and two different fronts of internal oxidation in the internal oxidation Zone. The coarser Ag2TeO3 particles were formed through the in situ internal oxidation of Ag2Te particles and the tiny oxide precipitates (most probably also Ag2TeO3) were formed through internal oxidation of tellurium from solid solution. Considering the mechanism of internal oxidation, both diffusion less and diffusive modes were found to be present simultaneously in the oxidation of Ag-1.3 at.% Te alloy. These results were examined with regard to the solubility of tellurium in silver, which was found to be 0.1 at.% Te at 750 degreesC and 0.26 at.% Te at 830 degreesC, as well as the presence and dissolution of Ag2Te particles.