Real-time in situ observation of shear modulus evolution during Ostwald ripening of colloidal crystallization

doi:10.1016/j.jcrysgro.2018.06.027

	Real-time in situ observation of shear modulus evolution during Ostwald ripening of colloidal crystallization
	Zhou HW(周宏伟); Xu SH(徐升华); Sun ZW(孙祉伟)
刊名	JOURNAL OF CRYSTAL GROWTH
	2018-11-15
卷号	502 页码:35-40
关键词	Colloidal crystal Crystallization Ostwald ripening Shear modulus
ISSN号	0022-0248
DOI	10.1016/j.jcrysgro.2018.06.027
英文摘要	Real-time in situ observation of evolution of shear modulus during the crystallization and ripening of colloidal particles suspensions was conducted by using reflection spectrum and torsional resonance spectroscopy simultaneously. According to the structural information obtained by reflection spectrum, after the completion of nucleation, the crystallization can be basically divided into four stages: crystallization-dominated stage, crystallization and ripening coexistence stage, ripening-dominated stage and crystallization completion stage. Colloidal particles volume fraction significantly affects the duration of each stage. Our experiments showed that the ripening process is the main cause for the improvement of the mechanical strength (the increase of shear modulus). This observation is supposed to be associated with the diminishing of crystal interface as the result of the increase in crystallites size and the decrease in crystallites number during the ripening process. In addition, a theoretical analysis is given briefly on the softening effect induced by nonaffinity of disordered particles in interface region.
分类号	Q3
URL标识	查看原文
WOS关键词	MECHANICAL-PROPERTIES ; ELASTIC-CONSTANTS ; PHASE-TRANSITION ; X-RAY ; CRYSTALS ; KINETICS ; NANOPARTICLES ; SPHERES ; FCC ; NANOCRYSTALS
WOS研究方向	Crystallography ; Materials Science, Multidisciplinary ; Physics, Applied
语种	英语
WOS记录号	WOS:000445909700006
资助机构	National Natural Science Foundation of China [11672295, 11572322, 11302226]
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/77865]
专题	力学研究所_国家微重力实验室
作者单位	1.Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Key Lab Micrograv, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100149, Peoples R China
推荐引用方式 GB/T 7714	Zhou HW,Xu SH,Sun ZW. Real-time in situ observation of shear modulus evolution during Ostwald ripening of colloidal crystallization[J]. JOURNAL OF CRYSTAL GROWTH,2018,502:35-40.
APA	周宏伟,徐升华,&孙祉伟.(2018).Real-time in situ observation of shear modulus evolution during Ostwald ripening of colloidal crystallization.JOURNAL OF CRYSTAL GROWTH,502,35-40.
MLA	周宏伟,et al."Real-time in situ observation of shear modulus evolution during Ostwald ripening of colloidal crystallization".JOURNAL OF CRYSTAL GROWTH 502(2018):35-40.