Grain size dependence of mechanical properties in nanocrystalline selenium
文献类型：期刊论文
| 作者 | K. Lu ; H. Y. Zhang ; Y. Zhong ; H. J. Fecht |
| 刊名 | Journal of Materials Research
 |
| 出版日期 | 1997 |
| 卷号 | 12期号:4页码:923-930 |
| 关键词 | hall-petch relationship behavior alloys cu ni pd |
| ISSN号 | 0884-2914 |
| 中文摘要 | Porosity-free nanocrystalline element selenium (nc-Se) samples with the mean grain sizes ranging from 8 to 70 nm were: synthesized by complete crystallization of the melt-quenched amorphous Se solid. Mechanical properties including microhardness (H-nu) and elastic modulus (E) of the nc-Se samples were measured by means of nanoindentation tests and microhardness tests, respectively. With a reduction of grain size, the nc-Se samples were found to be substantially hardened. But the grain size dependence of H-nu does not follow a simple Hall-Fetch relation over the whole grain size range, exhibiting three distinct stages corresponding to three different Hall-Fetch slopes. The maximum Hall-Fetch slope was found to be in the grain size range of 15-20 nm, corresponding to large values of the: elastic modulus. This behavior can be explained in terms of the lattice distortion in the nc-Se samples that was experimentally determined by using quantitative x-ray diffraction measurements. A conclusion is drawn that the lattice structure of the nm-sized crystallites may play an important role in mechanical properties of nanocrystalline materials. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/38042]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | K. Lu,H. Y. Zhang,Y. Zhong,et al. Grain size dependence of mechanical properties in nanocrystalline selenium[J]. Journal of Materials Research,1997,12(4):923-930. |
| APA | K. Lu,H. Y. Zhang,Y. Zhong,&H. J. Fecht.(1997).Grain size dependence of mechanical properties in nanocrystalline selenium.Journal of Materials Research,12(4),923-930. |
| MLA | K. Lu,et al."Grain size dependence of mechanical properties in nanocrystalline selenium".Journal of Materials Research 12.4(1997):923-930. |
入库方式： OAI收割
来源：金属研究所
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