The Linear Thermal Expansion of Bulk Nanocrystalline Ingot Iron from Liquid Nitrogen to 300 K
文献类型：期刊论文
| 作者 | S. G. Wang ; Y. Mei ; K. Long ; Z. D. Zhang |
| 刊名 | Nanoscale Research Letters
 |
| 出版日期 | 2010 |
| 卷号 | 5期号:1页码:48-54 |
| 关键词 | Linear thermal expansion Bulk nanocrystallined materials Severe rolling technique electrochemical corrosion behavior different grain sizes microstructure diffraction selenium metals |
| ISSN号 | 1931-7573 |
| 中文摘要 | The linear thermal expansions (LTE) of bulk nanocrystalline ingot iron (BNII) at six directions on rolling plane and conventional polycrystalline ingot iron (CPII) at one direction were measured from liquid nitrogen temperature to 300 K. Although the volume fraction of grain boundary and residual strain of BNII are larger than those of CPII, LTE of BNII at the six measurement directions were less than those of CPII. This phenomenon could be explained with Morse potential function and the crystalline structure of metals. Our LTE results ruled out that the grain boundary and residual strain of BNII did much contribution to its thermal expansion. The higher interaction potential energy of atoms, the less partial derivative of interaction potential energy with respect to temperature T and the porosity free at the grain boundary of BNII resulted in less LTE in comparison with CPII from liquid nitrogen temperature to 300 K. The higher LTE of many bulk nanocrystalline materials resulted from the porosity at their grain boundaries. However, many authors attributed the higher LTE of many nanocrystalline metal materials to their higher volume fraction of grain boundaries. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31513]  |
| 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 | S. G. Wang,Y. Mei,K. Long,et al. The Linear Thermal Expansion of Bulk Nanocrystalline Ingot Iron from Liquid Nitrogen to 300 K[J]. Nanoscale Research Letters,2010,5(1):48-54. |
| APA | S. G. Wang,Y. Mei,K. Long,&Z. D. Zhang.(2010).The Linear Thermal Expansion of Bulk Nanocrystalline Ingot Iron from Liquid Nitrogen to 300 K.Nanoscale Research Letters,5(1),48-54. |
| MLA | S. G. Wang,et al."The Linear Thermal Expansion of Bulk Nanocrystalline Ingot Iron from Liquid Nitrogen to 300 K".Nanoscale Research Letters 5.1(2010):48-54. |
入库方式： OAI收割
来源：金属研究所
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