کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10655730 1005239 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Self-diffusion of cobalt in B2 type intermetallic compound CoAl
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Self-diffusion of cobalt in B2 type intermetallic compound CoAl
چکیده انگلیسی
The self-diffusion coefficient of 57Co in B2 type intermetallic compound CoAl at the concentrations of 42, 46, 50 and 52 at.% Al has been determined in the temperature range between 1250 and 1630 K by use of the serial radio-frequency sputter-microsectioning technique. The diffusion coefficient of cobalt, DCo*, decreases with increase in Al concentration from the Co-rich composition to the stoichiometry, while DCo* in Al-rich Co-52 at.% Al alloy is almost equal to that at the stoichiometry. At higher temperature region above 0.8 Tm (Tm: melting temperature of alloys), DCo* deviates upward largely from the Arrhenius line, suggesting that the diffusion mechanism changes with increasing temperature from the monovacancy to the divacancy mechanism.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 13, Issue 2, February 2005, Pages 163-167
نویسندگان
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