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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)
2018-11-15
发表期刊JOURNAL OF CRYSTAL GROWTH
卷号502页码:35-40
ISSN0022-0248
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.
关键词Colloidal crystal Crystallization Ostwald ripening Shear modulus
DOI10.1016/j.jcrysgro.2018.06.027
URL查看原文
收录类别SCI ; EI
语种英语
WOS记录号WOS:000445909700006
关键词[WOS]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
WOS类目Crystallography ; Materials Science ; Physics
项目资助者National Natural Science Foundation of China [11672295, 11572322, 11302226]
论文分区Q3
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77865
专题国家微重力实验室
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.
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