کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1451516 988779 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Controlled dynamics of grain boundaries in binary alloys
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Controlled dynamics of grain boundaries in binary alloys
چکیده انگلیسی

Grain boundary motion of binary alloys is investigated experimentally using an organic alloy model system succinonitrile–coumarin152. In a temperature gradient, the grain boundaries drift toward the high temperature region in addition to grain boundary migration due to grain coarsening. We found that the grain boundary drift speed V depends on temperature gradient G and temperature T as V = DG/{(1 − k)(T0 − T)}, where D is the diffusion coefficient, k is the segregation coefficient, and T0 is the melting point of the pure succinonitrile. We show that the grain boundary orientation can be controlled by applying a local temperature gradient through UV or laser heating. In bulk samples, local heating of the interior is generated using two-photon absorption and imaged with a laser scanning microscope.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 53, Issue 12, July 2005, Pages 3503–3510
نویسندگان
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