US Egypt Cooperative Research: Development of High Performance Nano-Sized Tungsten Heavy Alloy Composites by Powder Metallurgy

美埃合作研究：粉末冶金开发高性能纳米钨重合金复合材料

• 批准号: 0914424
• 负责人: Randall German
• 金额: $ 5万
• 依托单位: San Diego State University Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0914424&HistoricalAwards=false
• 关键词: US; Egypt; Cooperative; Research; Development

This collaborative research project is being undertaken by Dr. Randall M. German, San Diego State University, and Dr. Sayed Farag Moustafa, Central Metallurgical Research and Development Institute of Egypt, on the topic of utilizing new nanoscale coating techniques to form copper coated nanoscale tungsten powders for low temperature net-shape sintering densification. Tungsten heavy alloys (WHAs) were developed in the 1930s for applications requiring high density and tailored thermal and electrical properties useful in electrical switching equipment, inertial guidance systems, and vibration dampening. Today, new applications are emerging in computer and microelectronic systems for heat dissipation, as well as in electro-discharge machining and aircraft stabilizers. Many WHA compositions rely on high tungsten contents and a matrix consisting of various iron, nickel, cobalt, and copper additions. Tungsten solubility in the matrix is historically required to induce liquid phase sintering densification. Concomitant with densification (at temperatures near 1500°C) is extensive grain growth. However, an alternative is to use an insoluble system, W-Cu, with a nano-sized particle to induce rapid, lower temperature sintering without grain coarsening. In this collaboration, a wide range of scientific and engineering applications will be explored, including microwave packaging, electrical contacts, integrated circuit heat sinks, welding electrodes, and plasma spray electrodes. The US partner will be responsible for sintering and coarsening studies on the novel powders fabricated by the Egyptian partner, who will also work on rationalization of the properties and applications. The project is funded under the US-Egypt Joint Fund Program, which provides grants to scientists and engineers in both countries to undertake cooperative research.

该合作研究项目由圣地亚哥州立大学的 Randall M. German 博士和埃及中央冶金研究与发展研究所的 Sayed Farag Moustafa 博士正在进行，主题是利用新的纳米级涂层技术形成铜涂层纳米级用于低温净成型烧结致密化的钨粉是在 20 世纪 30 年代开发的，用于需要高密度和定制热性能和电性能的应用。如今，计算机和微电子系统的散热以及电火花加工和飞机稳定器中的新应用不断涌现，许多 WHA 组合物都依赖于高钨含量和基体。历史上需要在基体中添加各种铁、镍、钴和铜来诱导液相烧结致密化。致密化（在接近 1500°C 的温度下）是广泛的晶粒生长。然而，另一种方法是使用不溶性系统 W-Cu，其具有纳米尺寸的颗粒，可以快速感应、低温烧结，而不会导致晶粒粗化。将探索广泛的科学和工程应用，包括微波封装、电接触、集成电路散热器、焊接电极和等离子喷涂电极，美国合作伙伴将负责新型材料的烧结和粗化研究。该项目由美国-埃及联合基金计划资助，该计划为两国科学家和工程师进行合作研究提供资助。