GOALI: Plasma Activated Sintering (PAS) of Tungsten Based Powders

GOALI：钨基粉末的等离子体激活烧结 (PAS)

• 批准号: 9632280
• 负责人: Joanna Groza
• 金额: $ 21.4万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-15 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9632280&HistoricalAwards=false
• 关键词: GOALI; Plasma; Activated; Sintering; PAS

Abstract CTS-9632280 A combined modeling and experimental investigation of the basic mechanisms of consolidation in the Plasma Activated Sintering (PAS) process will be undetaken, with illustration to a high temperature metal (tungsten) powder. Special focus will be on understanding the role of the electric field and particle surface activation on sintering. The phenomena necessary developing a manufacturing process applicable to the consolidation of high quality tungsten powders, including the resultant microstructure, will be analyzed. The computer simulation considers five sintering mechanisms, including surface and grain boundary diffusion, volume diffusion from the surface and contact area, and evaporation-condensation. This GOALI (Grant Opportunities for Academic Liaison with Industry) project will be performed in collaboration with Teledyne Co. The company will participate to the research effort, provide some basic materials and equipment, and support summer fellowship in industry for a graduate student working on the project during the academic year. The results are expected to develop a scientific foundation applicable to other powders than tungsten-based. PAS has the ability to consolidate powders in minutes as compared to hours for conventional sintering, and has particular relevance to net shape manufacturing. ***

摘要CTS-9632280 本文以高温金属（钨）粉末为例，对等离子体活化烧结（PAS）过程中的基本固结机理进行了模拟和实验研究。 特别关注的是理解电场和颗粒表面活化对烧结的作用。 将分析开发适用于高质量钨粉固结的制造工艺所需的现象，包括所得的微观结构。 计算机模拟考虑了五种烧结机制，包括表面和晶界扩散，从表面和接触面积的体积扩散，和蒸发冷凝。 该GOALI（与工业界学术联络的赠款机会）项目将与Teledyne公司合作进行，该公司将参与研究工作，提供一些基本材料和设备，并支持在学年期间从事该项目的研究生在工业界的暑期奖学金。 该研究结果有望为钨基粉末以外的其他粉末提供科学依据。 与传统烧结的数小时相比，PAS具有在数分钟内固结粉末的能力，并且与净成形制造特别相关。 ***