The Linear Thermal Expansion of Bulk Nanocrystalline Ingot Iron from Liquid Nitrogen to 300 K

doi:10.1007/s11671-009-9441-4

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	The Linear Thermal Expansion of Bulk Nanocrystalline Ingot Iron from Liquid Nitrogen to 300 K
	S. G. Wang; Y. Mei; K. Long; Z. D. Zhang
通讯作者	Wang,SG(sgwang@imr.ac.cn)
	2010
发表期刊	Nanoscale Research Letters
ISSN	1931-7573
卷号	5 期号:1 页码:48-54
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.
部门归属	[wang, s. g.; long, k.; zhang, z. d.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [wang, s. g.; long, k.; zhang, z. d.] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. [mei, y.] dalian fisheries univ, inst sci, dalian 116023, peoples r china.;wang, sg (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;sgwang@imr.ac.cn
关键词	Linear Thermal Expansion Bulk Nanocrystallined Materials Severe Rolling Technique Electrochemical Corrosion Behavior Different Grain Sizes Microstructure Diffraction Selenium Metals
DOI	10.1007/s11671-009-9441-4
URL	查看原文
语种	英语
WOS记录号	BMC:10.1007/s11671-009-9441-4
出版者	Springer New York
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31513
专题	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.