کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1635796 1516950 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cooling rate dependence of polymorph selection during rapid solidification of liquid metal zinc
ترجمه فارسی عنوان
وابستگی نرخ خنک کننده به انتخاب پلی مورف در طی انجماد سریع روی فلز مایع
کلمات کلیدی
انتخاب پلی مورف، ساختار کریستالی، انجماد سریع، فلز روی، شبیه سازی دینامیک مولکولی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی
The polymorph selection during rapid solidification of zinc melt was investigated by molecular dynamics simulation. Several methods including g(r), energy, CNS, basic cluster and visualization were used to analyze the results. The results reveal that the cooling rate has no observable effect on the microstructure as T>Tc(Tc is the onset temperature of crystallization); and at the first stage of crystallization, although microstructures are different, the morphologies of nucleus are similar, which are composed of HCP and FCC layers; the polymorph selection of cooling rate finally takes place at the second stage of crystallization: at a high cooling rate, the rapid increase of FCC atoms leads to a FCC crystal mixed with less HCP structures; while at a low cooling rate, HCP atoms grow at the expense of FCC atoms, resulting in an almost perfect HCP phase. The results reveal that the cooling rate is one of the important factors for polymorph selection.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 25, Issue 12, December 2015, Pages 4072-4079
نویسندگان
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