US-Egypt Cooperative Research: Manufacture of Aluminum and Magnesium Matrix Composites under Industrial Conditions

描述：该奖项旨在支持威斯康星大学密尔沃基分校（UWM）材料系教授Pradeep Rohatgi博士与埃及开罗Helwan中央冶金研究与发展研究所Atef Daoud博士之间的合作项目。两位科学家计划开展研究，旨在加深对颗粒聚集、沉淀、成核和颗粒推动等基本现象的理解，这些现象控制着颗粒的分布并影响铸造金属基复合材料（MMC）的性能。这项工作将导致铸造金属基复合材料成本的降低和性能的提高。MMC由金属基体和增强相（如纤维和颗粒）组成。基体的主要作用是将荷载传递和分配给钢筋。增强剂赋予复合材料强度、刚度和其他理想的性能，如耐磨性和低摩擦系数。增强剂一般为陶瓷，包括氧化物、碳化物和氮化物。使用这些材料是因为它们在室温和高温下具有高强度和刚度的组合。颗粒是最便宜的增强材料，它们赋予复合材料各向同性的特性。在铝碳化硅增强材料中，氧化铝和粉煤灰因其相对低廉的成本和良好的物理力学性能而成为有吸引力的材料。范围：虽然美国汽车工业目前使用铸造复合材料制造有限数量的部件，但某些问题，如高成本，低延展性和断裂韧性，性能分散和铸造缺陷，阻碍了铸造MMC的广泛使用。这项研究将有助于克服这些问题。美国PI在合金和MMC的凝固加工方面具有丰富的经验和深厚的背景。他和这位埃及科学家在之前的联合研究活动中建立了合作关系。在这个项目中，Daoud博士在实验室规模制造MMC组件方面的经验将补充Rohatgi博士的基础研究经验。该项目可能有利于美国和埃及推广使用铸造金属基复合材料，以节约能源和环境。这项研究预计将涉及一名美国博士后和威斯康星大学的一些美国本科生。该项目得到了美国-埃及联合基金项目的支持，该项目向两国的科学家和工程师提供赠款，以开展这些合作活动。

0222603RohatgiDescription: This award is to support a collaborative project between Dr. Pradeep Rohatgi, Professor in the Department of Materials at the University of Wisconsin- Milwaukee (UWM), Milwaukee, Wisconsin and Dr. Atef Daoud, Central Metallurgical Research and Development Institute, Helwan, Cairo, Egypt. The two scientists plan to conduct research aimed at increased understanding of fundamental phenomena of particle clustering, settling, nucleation and particle pushing, which control the distribution of particles and influence the properties in cast metal matrix composites (MMC). The work should result in a decrease in cost and improvement in properties of cast metal matrix composites. MMC consist of a metallic matrix and a reinforcing phase such as fibers and particles. The main function of the matrix is to transfer and distribute the load to the reinforcement. The reinforcements impart strength, stiffness and other desirable properties like wear resistance and a low coefficient of friction to the composites.Reinforcements are generally ceramics, including oxides, carbides and nitrides. These materials are used because of their combination of high strength and stiffness at room and elevated temperatures. Particles are the cheapest form of reinforcement materials and they impart isotropic properties to composites. Among the reinforcements in aluminum SiC, aluminum oxide and fly ash are attractive materials because of their relatively low costs and interesting physical and mechanical properties. Scope: Although the U.S. automotive industry currently manufactures a limited number of components from cast composites, certain problems, such as high cost, low ductility and fracture toughness, a scatter in properties and casting defects, prevent the widespread use of cast MMC. This research will help overcome these issues. The U.S. PI has experience and a strong background in the solidification processing of alloys and MMC. He and the Egyptian scientist have established collaboration in previous joint research activities. In this project, Dr. Daoud's experience in laboratory-scale manufacturing of MMC components will complement the fundamental research experience of Dr. Rohatgi. The project is likely to benefit the U.S. as well as Egypt in promoting the use of cast metal matrix composites to conserve energy and the environment. The research is expected to involve a U.S. postdoctorate and a number of U.S. undergraduate students at UWM. This project is being supported under the US-Egypt Joint Fund Program, which provides grants to scientists and engineers in both countries to carry out these cooperative activities.