کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1561128 1513935 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The sintering and densification behaviour of many copper nanoparticles: A molecular dynamics study
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
The sintering and densification behaviour of many copper nanoparticles: A molecular dynamics study
چکیده انگلیسی
Despite its relevance to a range of technological applications including nanocrystalline material fabrication, the sintering mechanisms of nanoparticles have not been well understood. It has been recognized that extrapolation from understanding of macro-particle sintering is unreliable for the nano-particle size regime. In this work, the sintering behaviour of copper nanoparticles under periodic boundary conditions at different temperatures and pressures was investigated by Molecular Dynamics simulations. It was found that smaller particle sizes, higher temperature and higher external pressure facilitate densification. Through a comparison with a two-sphere model, the governing mechanisms for many nanoparticles sintered at low temperature (T⩽900K) were identified to be a variety of plasticity processes including dislocation, twinning and even amorphization at the contact neck regions, due to the presence of high stresses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 74, June 2013, Pages 1-11
نویسندگان
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