中国科学院院士张荻：金属材料的构型化复合

各位老师、同学们：

您好！2024年3月22日（周五）下午16:00-17:30，中国科学院院士张荻教授受邀来校讲座，地点为工学院南楼813报告厅。详情如下，欢迎全校师生参加！祝好，谢谢！

“南科大讲堂”第349期

“工学院大讲堂”第75期

“材料杰出讲座系列”第24期

题 目： 金属材料的构型化复合

Title:  Architectured Metal Matrix Composites

时 间：2024年3月22日（周五）下午16:00-17:30

TiMe:  16:00-17:30, March 22 (Friday), 2024

地 点：工学院南楼813报告厅

Venue: Room 813, South Tower, College of Engineering

主 讲：张荻院士

Guest speaker: Academician Di Zhang

嘉宾简介

张荻，上海交通大学讲席教授，中国科学院院士、金属基复合材料国家重点实验室主任，国家973、重点研发计划首席科学家。1982年毕业于西安交通大学机械系，1985、1988年分别获日本大阪大学材料系硕士、博士学位，1988年迄今在上海交通大学任教。长期从事金属基及构型化复合的应用基础研究，系统解决了复合制备、形变加工、构效关系等关键科学与技术难题，基础研究支撑应用，研制的轻质高强金属基复合材料已应用于我国空间站、探月工程及武器装备等多种型号。获国家自然科学奖二等奖2项（第一完成人），发表SCI收录论文600余篇，SCI他引2.3万余次，出版中英文学术专著3本，授权中国发明专利80余项，制定国家标准3项。

Prof. Di Zhang, Chair Professor at Shanghai Jiao Tong University, Academician of the Chinese Academy of Sciences, and Director of the State Key Laboratory of Metal Matrix Composites. He is also a "Cheung Kong Scholar" of the Ministry of Education, and the Chief Scientist of the National 973 Program and Key R&D Program. He graduated from the Department of Mechanical Engineering of Xi'an Jiaotong University in 1982, and obtained his master's and doctoral degrees in Materials Science from Osaka University in Japan in 1985 and 1988, respectively. He has been teaching at Shanghai Jiaotong University since 1988. Prof. Di Zhang has long been engaged in fundamental research on the application of metal matrix and architectured composites. He has systematically solved key scientific and technological problems related to composite preparation, processing, and structure-property relationships. The lightweight and high-strength metal matrix composites developed by his team have been applied in various projects such as China's space station, lunar exploration, and weaponry and equipment. He has received the Second Prize of the National Natural Science Award twice as the first author, published over 600 SCI-indexed papers with more than 23,000 citations, authored three academic monographs in both Chinese and English, obtained over 80 Chinese invention patents, and formulated 3 national standards.

报告摘要

轻质高强金属基复合材料可满足结构轻量化和结构-功能一体化设计需求，是高科技领域不可替代的关键基础材料。针对复合设计与制备、界面及形变调控、复合构效关系的关键科学与技术难题，建立了多元复合体系热/动力学模型，通过调控合金成分和增强体表面性质改善和调控界面相容性，发现并揭示了增强体诱发动态再结晶的热变形机制，解决了复合制备与成形加工难题，突破了若干“卡脖子”核心关键瓶颈，打破国际封锁，实现了在多种航天与武器装备型号上的应用突破。针对金属基复合材料高强低韧失配难题，启迪自然贝壳微纳砖砌复合构型可同步提高材料的强韧性的原理，创制出具有类贝壳微纳砖砌复合构型的CNT/Al基高强韧金属基复合材料，揭示了 “微纳砖砌”构型的强韧匹配协同机理，并在航天领域得到了应用验证，拓宽了金属基复合材料研究领域。为进一步深化构型化复合研究，巧借生物构型多样性及其独特结构效应，提出了“遗态复合材料”的新概念，建立了秉承自然精细构型的新型复合材料构筑方法，创制了一系列具有生物精细构型的新材料，发现了构型与组分耦合的新现象，揭示了构效机制，为构型化复合研究提供了新方法。

Lightweight and high-strength metal matrix composites can meet the design requirements of structural lightweighting and structural-functional integration, serving as indispensable essential materials in high-tech fields . To address critical challenges in composite design, fabrication, interface control, and structure-property relationships, a thermal/kinetic model for multi-component composite systems was established. By adjusting the alloy composition and enhancing the surface properties, the interface compatibility is improved and controlled. The thermally induced dynamic recrystallization mechanism induced by reinforcement is discovered and elucidated. This breakthrough resolves issues in composite preparation and forming processing, overcomes several key bottlenecks, breaks international barriers, and leads to breakthrough applications in various aerospace and weapon equipment models. Additionally, to tackle the high-strength and low-toughness mismatch in metal matrix composites, inspired by the principle that the micro-nano brick-like composite structure of natural shells, a CNT/Al-based high-strength and tough metal matrix composite with a shell-like micro-nano brick-like composite structure has been created. The synergistic mechanism of strength-toughness matching of the "micro-nano brick" structure is revealed, and it has been applied and verified in the aerospace field, broadening the research field of metal matrix composites. In order to further deepen the research on architectured composites, borrowing from the diversity of biological structures and their unique structural effects, a new concept of "morph-genetic composites" is proposed, and a new method for constructing composites that inherit natural fine structures is established. A series of new materials with intricate biological structures have been fabricated. New phenomena of coupling between structure and components have been uncovered, and the structure-property relationship has been unveiled, providing a novel approach to the investigation of architectured composites.