CAREER: Bio-inspired Manufacturing of High Strength, High Toughness Metal-Graphene Composites

职业：高强度、高韧性金属-石墨烯复合材料的仿生制造

• 批准号: 2309995
• 负责人: Dong Lin
• 金额: $ 50万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-10-01 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2309995&HistoricalAwards=false
• 关键词: CAREER; Bio; inspired; Manufacturing; Strength

This Faculty Early Career Development (CAREER) grant focuses on research in the manufacturing of bio-inspired metal-graphene composites that have both high strength and high toughness. Due to their light weight and high strength, metal matrix composites are increasingly used in automotive, aerospace, electronics packaging and thermal management applications. Attaining both high strength and high toughness is an essential requirement for many structural applications. However, it is a significant challenge for metal matrix composites to have both. Nature-evolved, damage-tolerant materials such as nacre, bone and wood are both strong and tough because of their hierarchical composite structure. Unlike bone and wood, which have complex microstructures, nacre exhibits superior mechanical properties with a simple composite microstructure. The toughness of nacre is three orders of magnitude higher than that of its main constituent aragonite owing to its hierarchical “brick-and-mortar” microstructure. This project investigates a novel manufacturing technique to engineer nacre- or bio-inspired three-dimensional metal-graphene composites. This research develops computational and experimental capabilities to understand the strengthening and toughening mechanisms in these materials. This project greatly impacts the metal matrix composites industry. The research is complemented by an educational and outreach program involving curriculum development, research training and engaging K-12 students and the general public. The goal of this research is to manufacture next-generation, damage-tolerant metal matrix composites for mission-critical applications. The research plan is to understand the evolution of the “brick-and-mortar” microstructure in three-dimensional metal-graphene composites as a function of manufacturing process parameters. The fabrication of the “brick-and-mortar” structure involves assembling sucrose-coated copper platelets in a three-dimensional structure, converting sucrose into a graphene network by chemical vapor deposition (CVD) and consolidating the assembly by hot pressing into a composite. An objective of this project is to study the strengthening and toughening mechanisms of strain hardening, deformation twinning, crack deflection and crack bridging as functions of the “brick-and-mortar” microstructure, i.e., copper platelet diameter and thickness, and thickness of the continuous graphene film. The fundamental understanding of the strengthening and toughening mechanisms through molecular dynamics simulations and mechanical testing guides the manufacture of nacre-inspired metal-graphene composite structures. The correlation between processing, microstructure and properties establishes the rational design of the metal-matrix manufacturing process. The bio-inspired composite manufacturing technique can be extended to other metal-graphene composites, e.g., using aluminum, magnesium, nickel, titanium, and their alloys as metal matrices. This project allows the PI to advance the knowledge base in computational modeling and metal matrix composites and establishes his long-term career in advanced manufacturing.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项教师早期职业发展（职业）赠款专注于在制造具有高强度和高韧性的生物启发的金属透明烯成分中的研究。由于其轻巧和高强度，金属基质组合物越来越多地用于汽车，航空航天，电子包装和热管理应用中。获得高强度和高韧性是许多结构应用的必要要求。但是，对于金属基质组成而言，两者都具有重大挑战。由于其分层复合结构，自然进化的，荷叶，骨骼和木材等耐受耐受的材料都坚固而坚硬。与具有复杂微观结构的骨头和木材不同，Nacre具有具有简单复合微观结构的优质机械性能。 Nacre的韧性是由于其层次“实体”微结构，比其主要构造芳香族的韧性高三个数量级。该项目调查了一种新型的制造技术，以设计成nacre或生物启发的三维金属透明烯成分。这项研究开发了计算和实验能力，以了解这些材料中的加强和加强机制。该项目极大地影响了金属矩阵组成行业。这项研究是由涉及课程开发，研究培训和吸引K-12学生和公众的教育和外展计划完成的。这项研究的目的是为关键任务应用制造下一代，耐受损害的金属基质组成。该研究计划是要了解三维金属 - 透明烯成分中“实体”微结构的演变，这是制造过程参数的函数。 “实体”结构的制造涉及在三维结构中组装成蔗糖涂覆的铜血小板，通过化学蒸气沉积（CVD）将蔗糖转化为石墨烯网络，并通过将热压缩成复合材料来巩固组装。该项目的一个目的是研究应变硬化，变形孪生，裂纹和裂纹桥接的加强和韧性机制，作为“实体”微结构的功能，即铜血小板直径和厚度，厚度，以及连续石墨烯膜的厚度。通过分子动力学模拟和机械测试对加强和加强机制的基本理解指导了NACRE启发的金属含磷酸复合材料结构。处理，微观结构和属性之间的相关性建立了金属矩阵制造过程的合理设计。生物启发的复合制造技术可以扩展到其他金属含键烯成分，例如，使用铝，镁，镍，钛及其合金作为金属矩阵。该项目允许PI在计算建模和金属矩阵组成方面推进知识库，并在高级制造业中确立了他的长期职业。该奖项反映了NSF的法定任务，并通过使用该基金会的知识分子和更广泛的影响来评估NSF的法定任务。

项目成果

In-Situ X-Ray Imaging High Strain Rate Compression of Laminate Al-Graphene Composite and Mechanical Property Characterization

• DOI: 10.1007/s11837-023-05853-z
• 发表时间: 2023-05
• 期刊: JOM
• 影响因子: 2.6
• 作者: Guang Yang;D. Xie;Y. Nie;X. Zhai;N. Kedir;Weinong W. Chen;A. Gaur;Suprem R. Das;S. Lei;K. Fezzaa;Jian Wang;Dong Lin