کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1867558 | 1530624 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Computer simulation of interstitial diffusion in disordered systems
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
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چکیده انگلیسی
We report on direct calculation of diffusion constant for interstitial diffusion in atomistic amorphous model when the inter-atomic potential between diffusing impurity and matrix atom is known. A new calculation method is suggested basing on Einstein equation. The simulation reveals that at low temperature the diffusion constant D for Lennard-Jones model (LJ) is three orders of magnitude lower as compared to crystalline bcc model. Furthermore, the number of interstitial site in LJ model varies for different impurity and is much less than in bcc model. In comparison with fcc model, the diffusion constant for both models is close to each other. The temperature dependence of Arrhenius plot for regular disordered lattice is also examined and discussed here.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 373, Issues 23â24, 25 May 2009, Pages 2077-2081
Journal: Physics Letters A - Volume 373, Issues 23â24, 25 May 2009, Pages 2077-2081
نویسندگان
P.K. Hung, T.V. Mung, L.T. Vinh,