Fabrication of Amorphous Metal Matrix Composites by Powder Consolidation

本研究的目的是开发一种新的制造工艺，用于制造玻璃金属基颗粒复合材料，并推进材料性能/功能，工艺条件和微观结构之间的关系的基本理解。该方法是将玻璃状（无定形）金属粉末与结晶金属粉末混合，将粉末混合物加热至玻璃状金属变得粘稠的点，然后迫使它们在一起以去除空隙空间并在高压和机械剪切下实现良好的颗粒间结合。 颗粒共混物固结将通过温热等径角挤压实现。 理论建模工作将与实验研究并行进行，以加深我们对玻璃态金属颗粒材料的固结、微观结构稳定性和失效机制的认识，并帮助指导先进玻璃态金属基复合材料制造的改进策略。 这项研究很重要，因为它将为制造一种新型的非常坚固的先进工程结构材料铺平道路，用于各种民用和军用应用，包括轻型运输车辆。 该项目将联合收割机实验工作与建模研究相结合，以提高对此类材料机械失效的微观结构机制的理解，并使设计/制造更好的工程应用复合材料成为可能。 该项目将对K-12和大学生产生影响，因为将开发简短的教学模块和几个实验室演示实验，以向学生介绍，培养他们对工程的兴趣。

The objective of this research is to develop a new manufacturing process for fabrication of glassy metal matrix particulate composite materials, and to advance the fundamental understanding of the relationships between material properties/function, processing conditions and micro-structure. The approach is to mix glassy (amorphous) metal powder with crystalline metal powder, heat the powder blend up to the point where the glassy metal becomes viscous, and then force them together to remove void space and achieve good inter-particle bonds under high pressure and mechanical shear. Particle blend consolidation will be achieved by warm equal channel angular extrusion. A theoretical modeling effort will be done in parallel with the experimental investigations to deepen our knowledge of consolidation, microstructural stability and failure mechanisms of glassy metal particulate materials and help guide improved strategies for fabrication of advanced glassy metal matrix composites. This research is important because it will pave the way for the manufacture of a new class of very strong advanced engineering structural materials for a variety of civilian and military applications including light weight transportation vehicles. The project will combine experimental work with modeling studies to improve the understanding of the micro-structural mechanisms responsible for the mechanical failure of such materials and enable the design/manufacture of better composites for engineering applications. The project will have an impact on K-12 and college students in that short teaching modules and several laboratory demonstration experiments will be developed for presentation to students to build their interest in engineering.