کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7880522 | 1509588 | 2015 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The envelope of size distributions in Ostwald ripening and grain growth
ترجمه فارسی عنوان
پاکت توزیع اندازه در بلوغ استوالد و رشد دانه
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
In the present paper the scaling properties of microstructure coarsening by Ostwald ripening or grain growth are studied by means of the envelope of the family of evolving size distribution functions, which complements the usual scaling analysis by some new aspects and results. For a self-similar family of size distribution functions the envelope is uniquely determined by the growth exponent and an envelope parameter, where the latter is a new characteristic quantity of the coarsening system associated with the scaled size distribution function. If the family of size distributions obeys the continuity equation their envelope is the location of the maximum particle flux density in size space, while for the corresponding cumulative size distribution the envelope is the location of maximum size that a particle or grain can take during the passage through its growth path. The construction of the envelope curve therefore allows the independent determination of some coarsening parameters without recourse to the full time development of the individual growth paths. Numerical studies by means of the Monte Carlo Potts model of grain growth confirm and complement the analytical results. Especially they reveal that at the early stage of growth the envelope has a much reduced and non-integer exponent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 88, 15 April 2015, Pages 334-345
Journal: Acta Materialia - Volume 88, 15 April 2015, Pages 334-345
نویسندگان
Peter Streitenberger, Dana Zöllner,