| Hardness of covalent crystals | |
| F. M. Gao; J. L. He; E. D. Wu; S. M. Liu; D. L. Yu; D. C. Li; S. Y. Zhang; Y. J. Tian | |
| 2003 | |
| 发表期刊 | Physical Review Letters
 |
| ISSN | 0031-9007 |
| 卷号 | 91期号:1 |
| 摘要 | Based on the idea that the hardness of covalent crystal is intrinsic and equivalent to the sum of the resistance to the indenter of each bond per unit area, a semiempirical method for the evaluation of hardness of multicomponent crystals is presented. Applied to beta-BC2N crystal, the predicted value of hardness is in good agreement with the experimental value. It is found that bond density or electronic density, bond length, and degree of covalent bonding are three determinative factors for the hardness of a polar covalent crystal. Our method offers the advantage of applicability to a broad class of materials and initializes a link between macroscopic property and electronic structure from first principles calculation. |
| 部门归属 | yanshan univ, key lab metastable mat sci & technol, coll mat sci & engn, qinhuangdao 066004, peoples r china. chinese acad sci, shenyang natl lab mat sci, shenyang 110016, peoples r china. chinese acad sci, changchun inst appl chem, lab rare earth chem & phys, changchun 130022, peoples r china. nanjing univ, solid state microstruct lab, nanjing 210008, peoples r china.;gao, fm (reprint author), yanshan univ, key lab metastable mat sci & technol, coll mat sci & engn, qinhuangdao 066004, peoples r china |
| 关键词 | Transition-metal Carbides Superhard Materials Chemical-bond Solids Semiconductors Nitrides Diamond Moduli |
| URL | 查看原文 |
| WOS记录号 | WOS:000183915400028 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/35831 |
| 专题 | 中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | F. M. Gao,J. L. He,E. D. Wu,et al. Hardness of covalent crystals[J]. Physical Review Letters,2003,91(1). |
| APA | F. M. Gao.,J. L. He.,E. D. Wu.,S. M. Liu.,D. L. Yu.,...&Y. J. Tian.(2003).Hardness of covalent crystals.Physical Review Letters,91(1). |
| MLA | F. M. Gao,et al."Hardness of covalent crystals".Physical Review Letters 91.1(2003). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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