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.

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.钨重金合金（WHA）是在1930年代开发的，用于应用高密度和量身定制的热和电气性能，可用于电动开关设备，惯性引导系统以及振动衰减。如今，用于散热的计算机和微电子系统以及电源加工和飞机稳定器中正在出现新的应用。许多WHA组成依赖于高钨含量和由各种铁，镍，钴和铜添加组成的基质。在历史上，基质中的钨溶解度是诱导液相烧结致密化的。与致密化（在1500°C接近1500°C的温度下）的伴随是广泛的谷物生长。但是，一种替代方法是使用不溶性系统W-CU，并带有纳米尺寸的粒子来诱导快速，较低的温度烧结而不块状。在这项合作中，将探索各种科学和工程应用，包括微波包装，电气触点，集成电路散热器，焊接电子和等离子体喷雾电极。美国合作伙伴将负责对埃及合作伙伴制造的新型粉末的烧结和粗糙研究，后者还将致力于对财产和应用的合理化。该项目是根据美国 - 埃及联合基金计划资助的，该计划为两国的科学家和工程师提供合作研究的赠款。