Abstract
Gold alloys with 1.5wt% total In and Fe were examined by X-ray microanalysis (XMA), X-ray diffraction, and reflection electron diffraction after oxidizing at 1000°C for 1hr in air in order to elucidate the morphological changes io the oxidation zones and the oxidized surface. Internal oxidation particles composed of In2O3 and Fe-oxides precipitate in needle-like shapes near the oxidized surface and in large clusters at the grain boundaries of the alloy interior. No detectable uniform external oxidation zone by XMA was formed on the alloy containing 1.50 to 0.15wt% In and up to 1.35wt% Fe.
