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Grain Boundary Segregation, Vacancies and Properties in Oxides

发布日期:2016-04-09   浏览次数

受黄荣教授的邀请,日本东京大学Yuichi Ikuhara教授将来信息科学与技术学院做报告,报告具体信息如下:

时间:2016年 4 月 14 日(周四)下午 1:30-2:30
地点:信息楼147会议室

报告人:Prof. Yuichi Ikuhara/Institute of Engineering Innovation, The University of Tokyo
报告内容:Grain Boundary Segregation, Vacancies and Properties in Oxides
报告摘要:
Grain boundary (GB) atomic structures are dependent on the GB characters such as misorientation angle and GB planes. In addition, GB structures are also influenced by the segregated dopants and vacancies to form the relaxed and stable structures. It is therefore needed to investigate the sites of vacancies and dopants segregated at GB, depending on the GB characters, to fully understand GB atomic structures, which are related to the material’s properties. In this study, various types of GBs were systematically fabricated for doped and pristine Al2O3, ZrO2, ZnO, TiO2, CeO2 by the bicrystal techniques, and the structures were characterized with an atomic scale by aberration-corrected STEM, EELS and EDS. Based on the experimental results, the role of segregated dopants and vacancies to change the GB structures and macroscopic properties were investigated by first principles calculation.
报告人简介:
Name : Yuichi Ikuhara
Position : Professor, Director of Nano Technology Center
Institute of Engineering Innovation, School of Engineering, The University of Tokyo
2-11-16, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
E-mail:ikuhara@sigma.t.u-tokyo.ac.jp
Degree of Information:
1988/3: Department of Materials Science, Kyusyu University (Dr. Eng.)
Academic Position:
1988/7: Researcher, Japan Fine Ceramics Center
1991/7: Visiting Assistant Professor, Case Western Reserve University.
1993/4: Managing Principal Researcher, Japan Fine Ceramics Center
1996/7: Associate Professor, Department of Materials Science, The University of Tokyo
2003/1-present: Full Professor, Institute of Engineering Innovation, The University of Tokyo
2008/4-present: PI, Japan Fine Ceramics Center (Concurrent Post)
2008/4-present: PI, WPI Professor, Tohoku University(Concurrent Post)
Membership of Professional Societies :
American Ceramics Society
Ceramics Society of Japan
Japan Institute of Metals
Japanese Society of Electron Microscopy
Japanese Society of Materials