2019年4月15日-19日，应实验室黄庆研究员和周小兵博士邀请，美国科罗大多矿业学院（Colorado School of Mines）Ivar Reimanis教授再次访问我实验室，并作了题为“Ceramics Engineering and Mechanical Behaviors”的系列讲座。

       Ivar教授从材料的晶体结构基础知识出发，为实验室相关领域研究生讲授了陶瓷材料的几种常见晶体结构，缺陷形式，以及缺陷对陶瓷材料电学性能的调控机理。详细介绍了陶瓷粉体常用制备方法以及相应的优缺点，重点讲解了液相化学方法，如溶胶凝胶法，化学共沉淀法等，制备高纯陶瓷粉体的原理及关键控制工艺参数。在陶瓷粉体分散与成型技术方面，Ivar教授从表面化学基础理论出发，为大家分析了陶瓷粉体分散的几种重要机理，如静电作用，空间位阻作用，双电层理论等。最后他以镁铝尖晶石透明陶瓷的烧结为例，详细讲解了陶瓷固相烧结与液相烧结的过程与机理。在脆性材料力学行为授课部分，Ivar教授首先带领研究生回顾了材料力学性能的基本概念，以及Griffith理论等重要基础知识，然后详细讲解了与我实验室研究密切相关的陶瓷基复合材料的增强增韧机理，以及相关测试方法与标准。

      讲学过程中，听课研究生与Ivar教授就各自研究课题中的相关问题进行了深入交流与讨论。访问期间，周小兵博士向Ivar教授详细汇报了实验室在碳化硅连接，以及碳化硅纤维增强MAX相陶瓷复合材料方向的研究进展。

讲座现场

讲座现场

Ivar Reimanis教授与学员们合影

报告人简介：

      Ivar Reimanis is the Herman F. Coors Distinguished Professor of Ceramic Engineering in the Metallurgical and Materials Engineering Department at Colorado School of Mines in Golden, Colorado.  He serves as Director of the Colorado Center for Advanced Ceramics and also as Director of the Electron Microscopy Laboratory.  Dr. Reimanis earned a BS in Materials Science and Engineering at Cornell University in 1984, a MS in Materials Science and Mineral Engineering at University of California, Berkeley, and a PhD in Materials at the University of California, Santa Barbara in 1990.  He spent a year under a Max Planck Institute postdoctoral fellowship in Stuttgart, Germany.  Dr. Reimanis worked as a postdoc at Los Alamos National Laboratory after which he served as a technical staff member until 1994 when he joined the Colorado School of Mines.  He spent a sabbatical at the University of Western Australia in Perth in 2002 as a Gledden Visiting Senior Fellow and was awarded a United States Fulbright award in 2007 to spend a semester at the Indian Institute of Science in Bangalore.  Dr. Reimanis is a Fellow of the American Ceramic Society, and he has served on ACerS Board of Directors and has volunteered in numerous other activities within ACerS.  He currently serves as Associate Editor for the Journal of the American Ceramic Society and he is a member of the International Editorial Board for Ceramics International. He is a member of the World Academy of Ceramics.  Dr. Reimanis has authored or co-authored about 120 refereed papers and five patents.