Abstract
The internal oxidation of a two-phase Ag-1.3 at.% Se alloy in pure oxygen was studied at 750, 800 and 830°C. The alloy is composed of a dilute solid solution of selenium in silver) and Ag2Se intermetallic particles. The internal oxidation of this alloy proceeds through gradual in-situ oxidation of the Ag2Se particles as well as through diffusive internal oxidation of selenium from solid solution. Gradual in-situ internal oxidation of Ag2Se particles reflects itself in the appearance of two internal-oxidation fronts, inner and outer, marking the beginning and end of the in-situ oxidation of Ag2Se particles. The oxide phase formed during in-situ oxidation is the molten double oxide, Ag2SeO3. A theoretical treatment of the phase relationships in a hypothetical Ag–Ag2Se–Ag2SeO3 ternary phase diagram is presented to assist the explanation of the mechanism of in-situ oxidation. The kinetics of oxidation are presented in Part II.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
