SummaryThe aging reaction of a 90 wt-% gold, 10 wt-% platinum alloy with nominal iron concentrations of 0.04, 0.08, and 0.16 wt-% iron has been studied using electrical resistance measurements. The electrical resistance was measured as a function of temperature from 300 to 750°C. A decrease in electrical resistance was observed occurring a t 350 to 450°C, when heating the solution treated and water quenched specimens containing iron. Subsequent heating and cooling curves follow the gold-platinum standard. Iso…
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