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) | |
发表期刊 | JOURNAL OF CRYSTAL GROWTH |
2018-11-15 | |
卷号 | 502页码:35-40 |
ISSN | 0022-0248 |
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 |
DOI | 10.1016/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 | 微重力重点实验室 |
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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