U.S.-France Cooperative Research: Study of the Dynamic Characteristics of Plasma Spray Torches

9415715 Heberlein这一为期三年的奖项将支持明尼苏达大学和利莫日大学研究小组在等离子体辅助制造方面的美法合作研究。美国调查人员是Joachim Heberlein和Emil Pfender，法国调查人员是Pierre Fuchais。他们的研究目标是进行诊断性实验，旨在提高等离子喷涂过程的可靠性和可控性。拟议的研究解决了缺乏重复性的主要原因，即等离子炬中电弧的动态行为不受控制。改进后的等离子炬可以在大规模制造和各种工业过程中有重要的应用，其中包括切割、焊接、等离子喷涂、提取冶金、熔炼和化学合成。美国和法国的实验室已经开发出专门的诊断技术来研究等离子体过程。该提案利用了互补的专业知识和正在进行的实验工作。不同几何形状的等离子体炬将使用不同的诊断技术。随后将对类似设计的手电筒进行实验。该项目将促进对等离子弧动态行为的了解，并将改进等离子喷涂设备的设计指南。***

9415715 Heberlein This three-year award will support U.S.-France cooperative research in plasma-aided manufacturing between research groups at the University of Minnesota and the University of Limoges. The U.S. investigators are Joachim Heberlein and Emil Pfender and the French investigator is Pierre Fauchais. The objective of their research is to perform diagnostic experiments designed to improve the reliability and controllability of the plasma spray process. The proposed research addresses the major cause of the lack of reproducibility, namely the uncontrolled dynamic behavior of the arc in the plasma torch. An improved plasma torch could have important applications in large-scale manufacturing and a variety of industrial processes, among them cutting, welding, plasma spraying, extractive metallurgy, melting- refining, and chemical synthesis. The U.S. and French laboratories have developed specific diagnostic techniques for studying the plasma process. The proposal takes advantage complementary expertise and ongoing experimental efforts. Different diagnostic techniques will be used on plasma torches of different geometries. Subsequent experiments on torches of similar design will then be conducted. The project will advance understanding of the dynamic behavior of the plasma arc and will result in improved design guidelines for plasma spray equipment. ***