报告题目： Engineering Design and Processing of Silicon Nitride Ceramics for Industrial Applications
林华泰，广东工业大学特聘教授、博士生导师，世界陶瓷科学院院士、美国陶瓷学会Fellow、美国材料学会Fellow、国际著名先进陶瓷专家、前美国橡树岭国家实验室主任/终身研究员、美国陶瓷学会董事会董事、广东省高技术陶瓷先进制造技术创新团队带头人。担任美国田纳西大学材料工程系兼职教授，中科院上海硅酸盐研究所、华南理工大学、浙江大学、哈尔滨工业大学、香港理工大学等多所高校的客座教授；以及清华-红旗渠新材料产业化发展中心科技专家，潮州三环(集团)股份有限公司、UK Morgan Advanced Materials技术顾问及首席科学家；同时担任多个世界顶级刊物的主编和编委，出版专著19本，在SCI杂志上发表论文180多篇，获得斯洛伐克科学院奥列尔•斯托多拉拉荣誉奖章、美国工程理事会杰出工程成就奖、美国陶瓷学会James I. Mueller奖、Lockheed Martin Energy Research Significant Event Award等多个国际奖项。研究内容主要包括：高温结构陶瓷材料微观结构设计；晶粒间膜和界面的结构及性能研究；陶瓷、复合材料及金属陶瓷的增韧机理研究；复合材料和厚膜材料的界面行为研究；陶瓷和复合材料的变形、断裂、疲劳、热应力及蠕变行为的研究；非氧化物陶瓷前驱体；以及陶瓷材料的绿色加工技术等。
Silicon nitride (Si3N4) ceramics exhibit a very unique microstructure, which contains whisker-like elongated grains embedded in a fine-grained matrix. The class of Si3N4 ceramics generally exhibits very good mechanical properties combined with good resistance to wear, corrosion, and oxidation. Therefore, Si3N4 ceramics were designed and implemented as hot-section structural components such as vane, blade, and turbo rotor in gas turbine and microturbine engines under several ceramic turbine programs funded by governments in 1990. The integrated global research efforts executed allow the ceramic community to gain a much better insight into how to design such a microstructure and the chemistry of interfaces as they closely relate to mechanisms for enhanced toughness in self-reinforced ceramics. It is also now well known that the oxide additives employed could influence the alpha-to-beta Si3N4 phase transformation, microstructural evolution, microstructural and chemical bonding of interfacial thin film during the processing and sintering procedures. Recently, much of attentions on Si3N4 ceramic have now focused on its application as an insulator substrate for power electronic components; i.e., IGBT, due to its excellent performance in mechanical properties and reliability to overcome the increased thermal stress and mechanical vibration generated during application conditions. This presentation will focus on engineering design and processing of chemical compositions and also microstructure of Si3N4 ceramics to achieve a combined physical and mechanical property targeted for a specific industrial application. The implications and challenges to achieve the aimed properties and performances learned through the course of these studies would also be presented and discussed in the paper.