کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1450777 988745 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reducing grain boundary, dislocation line and vacancy formation energies by solute segregation. I. Theoretical background
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Reducing grain boundary, dislocation line and vacancy formation energies by solute segregation. I. Theoretical background
چکیده انگلیسی

The Gibbs adsorption isotherm and Wagner’s definition of excess solute at surfaces and grain boundaries are both extended to include other crystalline defects, like dislocations and vacancies. By using a thermodynamic state function which is suitable for a partially open system, open with respect to solvent and closed with respect to solute atoms, a generalized Gibbs adsorption isotherm can be derived. Thus solute segregation to dislocations and vacancies gives rise to a reduction of their formation energies, too. The results of the presented treatment are compared with results stemming from statistical mechanics or computer simulations. Special attention is paid to the question whether defect energies might become zero or negative.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 55, Issue 15, September 2007, Pages 5129–5138
نویسندگان
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