Hardness of materials: studies at levels from atoms to crystals
发布时间：2019-03-10
点击次数：
- 论文类型：
- 期刊论文
- 发表时间：
- 2009-01-01
- 发表刊物：
- CHINESE SCIENCE BULLETIN
- 收录刊物：
- SCIE
- 文献类型：
- J
- 卷号：
- 54
- 期号：
- 1
- 页面范围：
- 131-136
- ISSN号：
- 1001-6538
- 关键字：
- hardness; atoms; ions; chemical bonds; materials
- 摘要：
- Based on the electron-holding energy per unit volume, we extend the concept of hardness to atomic stiffness, ionic stiffness and bond hardness, investigating the nature of material hardness at these three levels. We find that the stiffness of isolated atoms or ions has no direct connection with the hardness of materials, whereas material hardness is directly related to bond hardness, which is essentially determined by the electron-holding energy of its constituent chemical bonds per unit volume. We establish a model for identifying the hardness of materials on the basis of bond hardness. This work offers a deeper understanding of the nature of material hardness at the atomic level, and provides a practical guide in the search for new superhard materials.
- 第一作者
- Li KeYan
- 合写作者
- Xue DongFeng
- 通讯作者
- Xue, DF (reprint author), Dalian Univ Technol, Sch Chem Engn, Dept Mat Sci & Chem Engn, Dalian 116012, Peoples R China.