کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5436075 | 1509543 | 2017 | 7 صفحه PDF | دانلود رایگان |
Fe grain boundary diffusion is measured in 99.995Â wt.% pure Cu and the Cu-Fe alloys with iron contents of 0.18, 0.45, 0.6 and 0.8Â wt. % using the radiotracer technique and applying the 59Fe isotope. A series of isothermal experiments at 1000Â K reveal that the triple product of iron grain boundary diffusion is almost independent on the iron content excepting the alloy containing 0.8Â wt. % of Fe where the triple product is increased by three orders of magnitude. Additional experiments at 1100, 900 and 717Â K using this alloy confirm the anomaly observed at 1000Â K, namely the triple product is continuously increasing following the Arrhenius dependence from 717 to 1100Â K except the temperature of 1000Â K, where the triple product is anomalously high. The observed experimental results are explained by the analysis of thermodynamic equilibrium and solubility of Fe and S in Cu.
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Journal: Acta Materialia - Volume 133, July 2017, Pages 240-246