Microstructure evolution and thermal properties in nanocrystalline Cu during mechanical attrition

IMR OpenIR

	Microstructure evolution and thermal properties in nanocrystalline Cu during mechanical attrition
	Y. H. Zhao; K. Lu; K. Zhang
	2002
发表期刊	Physical Review B
ISSN	1098-0121
卷号	66 期号:8
摘要	The microstructural evolution and thermal properties of nanocrystalline (nc) Cu during mechanical attrition were investigated by using quantitative x-ray-diffraction and thermal analysis techniques. Upon milling of the Cu powders with coarse grains, the grain sizes are found to decrease gradually with the milling time, and remain unchanged at a steady-state value (about 11 nm) with continued milling. The microstrain and the stored enthalpy increase to maximum values during the grain refinement, and decrease then increase to the second maxima and decrease again within the milling stage of steady-state grain size, while the lattice parameter remains unchanged during the entire milling process. The grain boundary (GB) enthalpy of the nc Cu was estimated, showing a GB softening-hardening-softening cyclic variation within the steady-state milling. The present work indicated with clear experimental evidence that even within the milling stage of steady-state grain size, the microstructure (both the GB's and the crystallites) of nc materials is still changing, which may result from the GB sliding.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110015, peoples r china. univ hamburg, dept phys, d-20146 hamburg, germany.;zhao, yh (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110015, peoples r china;y.h.zhao@mf.mpg.de
关键词	Crystalline-amorphous Transformations Different Grain Sizes X-ray-diffraction Thermodynamic Properties Nanostructure Formation Metals Alloys Fe Powder Transition
URL	查看原文
WOS记录号	WOS:000177972500100
引用统计	被引频次：62[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36571
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. H. Zhao,K. Lu,K. Zhang. Microstructure evolution and thermal properties in nanocrystalline Cu during mechanical attrition[J]. Physical Review B,2002,66(8).
APA	Y. H. Zhao,K. Lu,&K. Zhang.(2002).Microstructure evolution and thermal properties in nanocrystalline Cu during mechanical attrition.Physical Review B,66(8).
MLA	Y. H. Zhao,et al."Microstructure evolution and thermal properties in nanocrystalline Cu during mechanical attrition".Physical Review B 66.8(2002).