EAGER: Mechanical Behavior of Metal/Ceramic Nanolaminate Composites; Experiments and Simulation

非技术描述：天然和人造层状结构具有极高的强度、韧性、耐热性和生物相容性。在微观尺度上，层状层状结构是钢作为结构材料获得高强度、高韧性的基本基础。自然界中的结构，如鲍鱼和软体动物的壳，其高强度和韧性来自于由有机胶粘合在一起的分层陶瓷结构。事实上，工程材料的结构经常模仿自然界的结构。纳米级的多层材料在极高的强度、抗疲劳性、耐热性、耐磨性和生物相容性方面表现出令人兴奋的可能性。因此，在纳米尺度上设计层状结构是开发具有巨大可能性的新一代多功能材料的一个特别有吸引力的策略。纳米层合材料具有更高的界面面积和更小的长度尺度，与传统的块状复合材料具有非常不同的性能。这些变化可以导致新的变形机制类型，这是非常不同于那些观察到的块状系统。在纳米尺度上对金属/陶瓷多层材料的力学行为进行基础研究是这些材料在工程应用中成功实现的必要条件。技术细节：该国际项目重点研究多层金属/陶瓷材料的高温性能。纳米层合材料的微观结构裁剪的新方法被用于获得强度和韧性的组合。系统地研究纳米层合材料的合成、微观结构、变形和模拟，对于进一步开发和理解纳米层合材料的微观结构和耐高温性能至关重要。这项工作的重点是在纳米尺度上的Ti/SiC多层模型系统。该项目涉及亚利桑那州立大学的Nik Chawla和他的研究团队，以及西班牙马德里理工大学马德里材料高级研究所（IMDEA）的Jon molina - alareguia（由西班牙国家科学基金会资助）。此外，它与洛斯阿拉莫斯国家实验室的研究人员有着密切的联系。尖端技术，如高温纳米压痕和原位压痕在扫描电子显微镜（SEM）将被使用。新一代的研究生正在接受以国际经验作为其研究固有组成部分的培训。此外，本科生将参与研究。

NON-TECHNICAL DESCRIPTION: Natural and man-made layered structures exhibit extremely high strength, toughness, thermal resistance, and biocompatibility characteristics. On the microscopic scale, lamellar layered structures are the basic foundation for the high strength and toughness of steel as a structural material. Structures in nature, such as abalone and mollusk shells, derive their high strength and toughness from a layered ceramic structure bonded together by an organic glue. Indeed, the structure of engineering materials often mimics the structures in nature. Multilayered materials at the nanoscale exhibit exciting possibilities for extremely high strength, fatigue resistance, thermal resistance, wear resistance, and biocompatibility. Thus, designing layered structures at the nanoscale is a particularly attractive strategy for developing a new generation of multifunctional materials with tremendous possibilities. Nanolaminate materials have very different properties from traditional bulk composites, due to their much higher interfacial area and dramatically smaller length scale. These changes can lead to new types of deformation mechanisms, which are very different from those observed in bulk systems. Fundamental research on the mechanical behavior of metal/ceramic multilayers at the nanoscale is necessary for successful implementation of these materials in engineering applications.TECHNICAL DETAILS: This international project focuses on the high temperature behavior of multilayered metal/ceramic materials. Novel approaches to microstructural tailoring of the nanolaminates are being used to obtain a combination of strength and toughness. A systematic study linking synthesis, microstructure, deformation, and simulation, is critical to further development and understanding of nanolaminate composites microstructures and elevated temperature resistance. The focus of this work is on a model system of Ti/SiC multilayers at the nanoscale. This project involves Nik Chawla and his research team at Arizona State University and Jon Molina-Aldareguia at the Madrid Institute for Advanced Studies of Materials (IMDEA) in the Polytechnic University of Madrid, Spain (funded by the Spanish National Science Foundation). Also, there are strong linkages to researchers at Los Alamos National Laboratory. Cutting-edge techniques such as high temperature nanoindentation and in situ indentation in a scanning electron microscope (SEM) will be used. A new generation of graduate students is being trained with international experiences as inherent component of their research. Additionally, undergraduate students will be engaged in the research.