کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1562494 999588 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Correlation between hardness and elastic moduli of the covalent crystals
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
Correlation between hardness and elastic moduli of the covalent crystals
چکیده انگلیسی

From a statistical manner, we collected and correlated experimental bulk (B), shear (G), Young’s modulus (E), and ductility (G/B) with Vickers hardness (Hv) for a number of covalent materials and fitted quantitative and simple Hv–G and Hv–E relationships. Using these experimental formulas and our first-principles calculations, we further predicted the microhardness of some novel potential hard/superhard covalent compounds (BC2N, AlMgB14, TiO2, ReC, and PtN2). It was found that none of them are superhard materials (Hv ⩾ 40 GPa) except BC2N. The present empirical formula builds up a bridge between Vickers hardness and first-principles calculations that is useful to evaluate and design promising hard/superhard materials.

Research highlights
► Elastic moduli are correlated with Vickers hardness for covalent materials.
► Linear relationships between shear/Young’s modulus and Vickers hardness are fitted.
► Hardness of some potential superhard compounds is predicted.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 50, Issue 7, May 2011, Pages 2287–2290
نویسندگان
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