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机械应力加工纳米材料的新进展

New aspects of processing nanomaterials under mechanical stressing
课程网址: http://videolectures.net/kolokviji_senna_nanomaterials/  
主讲教师: Mamoru Senna
开课单位: 庆应义塾大学
开课时间: 2011-09-19
课程语种: 日语
中文简介:
残酷的力量能给我们带来什么积极的东西吗?当然不。在每种类型的纳米复合材料中也是如此。然而,对细粉末混合物施加机械应力,使我们对功能性复合材料或化合物具有迷人的状态,这在其他方法无法实现时,在坚实的指导原则下进行。这是基于同时发生的复杂现象,例如剪切应力和随之而来的非弹性变形,不同伙伴的接触和相关的相互原子渗透称为机械扩散,固体结构单元的对称性损失(例如金属O6八面体用于许多过渡金属氧化物)和随后的配体交换等。这一点特别重要当我们观察到奇异的组合时,尤其是无机和有机晶体的组合。案例研究将涵盖一些不寻常的配位化合物,生物相容性纳米复合材料和用于微器件的电陶瓷的合成。
课程简介: Can a brutal force bring us anything positive? Definitely not. This is also the case in the nanocomposite materials in every genre. Exertion of mechanical stressing on the fine powdered mixtures, however, brings us fascinating states toward functional composites or compounds, which no other methods can realize, when carried out carefully and under a solid guiding principle. This is based on the complex phenomena occurring simultaneously, e.g. shear stress and consequent non-elastic deformation at the contact of dissimilar partners and associated mutual atomic penetration called mechanical diffusion, symmetry loss of the solid construction units (e.g. metal-O6 octahedra for many transition metal oxides) and consequent ligand exchange, etc. This is particularly significant, when we observe the exotic combinations, notably those of inorganic and organic crystals. Case studies will cover syntheses of some unusual coordination compounds, biocompatible nanocomposites and electroceramics for microdevices.
关 键 词: 纳米复合材料; 机械应力; 非弹性变形
课程来源: 视频讲座网
最后编审: 2020-10-22:chenxin
阅读次数: 57