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您好！2024年3月22日（周五）下午16:00-17:30，中國科學院院士張荻教授受邀來校講座，地點為工學院南樓813報告廳。詳情如下，歡迎全校師生參加！祝好，謝謝！

“南科大講堂”第349期

“工學院大講堂”第75期

“材料杰出講座系列”第24期

題 目： 金屬材料的構型化復合

Title:  Architectured Metal Matrix Composites

時 間：2024年3月22日（周五）下午16:00-17:30

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

地 點：工學院南樓813報告廳

Venue: Room 813, South Tower, College of Engineering

主 講：張荻院士

Guest speaker: Academician Di Zhang

嘉賓簡介

張荻，上海交通大學講席教授，中國科學院院士、金屬基復合材料國家重點實驗室主任，國家973、重點研發(fā)計劃首席科學家。1982年畢業(yè)于西安交通大學機械系，1985、1988年分別獲日本大阪大學材料系碩士、博士學位，1988年迄今在上海交通大學任教。長期從事金屬基及構型化復合的應用基礎研究，系統(tǒng)解決了復合制備、形變加工、構效關系等關鍵科學與技術難題，基礎研究支撐應用，研制的輕質高強金屬基復合材料已應用于我國空間站、探月工程及武器裝備等多種型號。獲國家自然科學獎二等獎2項（第一完成人），發(fā)表SCI收錄論文600余篇，SCI他引2.3萬余次，出版中英文學術專著3本，授權中國發(fā)明專利80余項，制定國家標準3項。

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.

報告摘要

輕質高強金屬基復合材料可滿足結構輕量化和結構-功能一體化設計需求，是高科技領域不可替代的關鍵基礎材料。針對復合設計與制備、界面及形變調控、復合構效關系的關鍵科學與技術難題，建立了多元復合體系熱/動力學模型，通過調控合金成分和增強體表面性質改善和調控界面相容性，發(fā)現(xiàn)并揭示了增強體誘發(fā)動態(tài)再結晶的熱變形機制，解決了復合制備與成形加工難題，突破了若干“卡脖子”核心關鍵瓶頸，打破國際封鎖，實現(xiàn)了在多種航天與武器裝備型號上的應用突破。針對金屬基復合材料高強低韌失配難題，啟迪自然貝殼微納磚砌復合構型可同步提高材料的強韌性的原理，創(chuàng)制出具有類貝殼微納磚砌復合構型的CNT/Al基高強韌金屬基復合材料，揭示了 “微納磚砌”構型的強韌匹配協(xié)同機理，并在航天領域得到了應用驗證，拓寬了金屬基復合材料研究領域。為進一步深化構型化復合研究，巧借生物構型多樣性及其獨特結構效應，提出了“遺態(tài)復合材料”的新概念，建立了秉承自然精細構型的新型復合材料構筑方法，創(chuàng)制了一系列具有生物精細構型的新材料，發(fā)現(xiàn)了構型與組分耦合的新現(xiàn)象，揭示了構效機制，為構型化復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.