کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1498785 993279 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Superplastic nanocrystalline ceramics at room temperature and high strain rates
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Superplastic nanocrystalline ceramics at room temperature and high strain rates
چکیده انگلیسی

Tensile-loading molecular dynamics simulations show that nanocrystalline SiC not only becomes ductile, but can be superplastically deformed at room temperature when grain sizes are reduced to d ∼ 2 nm. The calculated strain rate sensitivity, 0.67, implies a superplastic ceramic able to attain strains of up to 1000% at room temperature and typical strain rates (∼10−2 s−1). The origin of the superplasticity is linked to an unusually steep rise in creep rate to 106 s−1 for d = 2 nm. The results explain recent observations in SiC nanowires and suggest novel opportunities for structural ceramics.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Scripta Materialia - Volume 69, Issue 7, October 2013, Pages 525–528
نویسندگان
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