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，层状层状组织是钢作为结构材料具有高强度和高韧性的基本基础。自然界中的结构，如鲍鱼和软体动物贝壳，其高强度和韧性来自由有机胶粘合在一起的分层陶瓷结构。事实上，工程材料的结构常常模仿自然界中的结构。纳米尺度的多层材料显示出极高的强度、耐疲劳性、耐热性、耐磨性和生物兼容性。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种特别有吸引力的策略。纳米层状材料具有与传统块体复合材料非常不同的性质，这是因为它们具有更大的界面面积和更小的长度尺度。这些变化可能导致新类型的变形机制，这与在块体系统中观察到的机制非常不同。在纳米尺度上对金属/陶瓷多层膜的力学行为进行基础研究是这些材料成功应用于工程应用所必需的。技术细节：这个国际项目主要关注多层金属/陶瓷材料的高温行为。人们正在使用新的方法来剪裁纳米层状物的微观结构，以获得强度和韧性的组合。对纳米复合材料的合成、微观结构、变形和模拟进行系统的研究，对于进一步发展和理解纳米复合材料的微观结构和耐高温性能是至关重要的。这项工作的重点是建立一个纳米尺度的钛/碳化硅多层膜模型系统。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-Aldareguia(由西班牙国家科学基金会资助)。此外，这与洛斯阿拉莫斯国家实验室的研究人员有很强的联系。将使用尖端技术，如高温纳米压痕和扫描电子显微镜(SEM)的原位压痕。新一代研究生正在接受培训，将国际经验作为他们研究的固有组成部分。此外，本科生将参与这项研究。

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.