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：一种集成的加工、表征和建模方法Xin-Lin Gao，Texas A M University，xlgao@tamu. eduXiaoxun Li，University of Wisconsin-Madison，xlgao @engr.wisc. edu摘要陶瓷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发挥重要作用。然而，纳米陶瓷颗粒在铝合金熔体中的均匀分散是极其困难的。拟议的研究旨在通过综合处理，表征和建模方法，在理解这种铝基纳米复合材料方面取得实质性进展。将进行实验研究，以优化超声空化为基础的陶瓷纳米粒子分散到铝熔体的凝固处理，以表征所制造的块状纳米复合材料的微/纳米结构，并测量铝基纳米复合材料的机械性能。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，这将建立纳米复合材料的结构-性能关系的多尺度建模工作。该项目的成功完成将带来超声波辅助纳米颗粒分散和固化，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（空化和流动）的凝固处理新技术，将能够生产高性能块状铝基纳米复合材料。新的课程开发将使工程专业的学生能够获得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。外联活动将使K-12学生，教师和行业接触先进技术和多尺度模拟。与GOALI合作伙伴的合作将促进立即的纳米技术转让，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.