Collaborative Research/GOALI - Ceramic Nanoparticle Reinforced Aluminum Matrix Composites: An Integrated Processing, Characterization and Modeling Approach

合作研究/GOALI -陶瓷纳米颗粒增强铝基复合材料：一种综合加工、表征和建模方法高鑫林，德克萨斯a&m大学，xlgao@tamu.eduXiaochun李，威斯康星大学麦迪逊分校，xcli@engr.wisc.eduABSTRACTCeramic纳米颗粒增强铝基复合材料将在汽车、航空航天和许多其他应用中具有重要意义。然而，在铝合金熔体中均匀分散纳米陶瓷颗粒是非常困难的。本研究旨在通过综合处理、表征和建模方法，在理解铝基纳米复合材料方面取得实质性进展。实验研究将优化基于超声空化的陶瓷纳米颗粒分散到Al熔体中进行凝固处理，表征制备的块状纳米复合材料的微纳米结构，并测量Al基纳米复合材料的力学性能。这些实验活动将伴随着涉及分子动力学模拟、微观力学和连续介质力学的多尺度建模工作，这将建立纳米复合材料的结构-性能关系。该项目的成功完成将带来超声辅助纳米颗粒分散和凝固、纳米复合材料表征和测试、纳米力学和基于物理的多尺度建模等方面的新知识。该项目将进一步开发基于超声非线性效应（空化和流化）的凝固处理新技术，这将使高性能大块铝基纳米复合材料的生产成为可能。新课程的开发将使工程专业的学生能够接触到尖端的研究设施和新知识。辅导活动将吸引和吸引来自代表性不足群体的学生。拓展活动将向K-12学生、教师和行业展示先进技术和多尺度模拟。与GOALI合作伙伴的合作将促进纳米技术的即时转移，并对美国经济产生直接影响。

Collaborative Research/GOALI - Ceramic Nanoparticle ReinforcedAluminum Matrix Composites: An Integrated Processing, Characterizationand Modeling ApproachXin-Lin Gao, Texas A&M University, xlgao@tamu.eduXiaochun Li, University of Wisconsin-Madison, xcli@engr.wisc.eduABSTRACTCeramic nanoparticle reinforced aluminum (Al) matrix composites would be significant for automobile, aerospace and numerous other applications. However, it is extremely difficult to uniformly disperse nano-sized ceramic particles in Al alloy melts. The proposed research seeks to make substantial advances in understanding such Al matrix nanocomposites through an integrated processing, characterization and modeling approach. Experimental studies will be conducted to optimize the ultrasonic cavitation based dispersion of ceramic nanoparticles into Al melts for solidification processing, to characterize micro/nano-structures of the as-fabricated bulk nanocomposites, and to measure the mechanical properties of the Al matrix nanocomposites. These experimental activities will be accompanied by multiscale modeling efforts involving molecular dynamics simulations, micromechanics and continuum mechanics, which will establish the structure-property relations of the nanocomposites. The successful completion of this project will lead to new knowledge of ultrasonic-assisted nanoparticle dispersion and solidification, nanocomposite characterization and testing, nanomechanics, and physics-based multiscale modeling. The novel technology, ultrasonic non-linear effects (cavitation and streaming) based solidification processing, to be further developed in the project, will enable the production of high performance bulk Al matrix nanocomposites. New course development will enable engineering students to access cutting-edge research facilities and new knowledge. Mentoring activities will attract and engage students from under-represented groups. Outreach activities will expose K-12 students, teachers and industries to advanced technologies and multiscale simulations. Collaboration with the GOALI partner will facilitate immediate nanotechnology transfer and have a direct impact on the U.S. economy.