GOALI: Development of temperature sensing doped particles for plasma deposition diagnostics

国家科学基金会建议编号：CTS-0553623主要研究员：Renfro，Michael W.隶属于：康涅狄格大学建议标题：GALI：开发用于等离子体沉积诊断的温度敏感掺杂粒子等离子喷涂是一种广泛使用的技术，通过在等离子体撞击衬底之前将材料注入到等离子体中来创建涂层。注塑材料的温度历史是决定涂层质量的关键。然而，等离子体过程的非常高的温度使当地的测量变得复杂。该研究项目将开发一种基于激光荧光的温度测量，可以应用于这些恶劣的环境中，并提供关于材料颗粒的温度和热传递的准确和局部瞬时信息。它被认为是第一个可用于在这些环境中进行实时温度测量的此类技术。康涅狄格大学的新型喷雾设备以及橡树岭国家实验室和NASA的合作实验室将生产掺杂了温度敏感材料的颗粒。一旦这些颗粒和诊断方法被开发出来，该项目中产生的温度敏感颗粒将被注入运行中的等离子喷雾中，用于局部颗粒温度测量。涂层是用来防止高温的，但对发动机运行中的实际情况的测量对于改进部件和涂层的设计至关重要。使用我们的工业合作伙伴西门子西屋电力公司的设施，将对燃气轮机发动机部件中的高温气流进行测量。它们的光学可访问引擎提供了测试高温材料的独特机会，这些材料是为更好地管理温度而开发的。西门子还通过招收研究生作为实习生参与了这项拟议的工作，以促进技术交流。智力优势：等离子喷涂过程中注射材料温度的测量是所生产涂层质量的一个重要不确定性来源。拟议的工作将使本地的高精度测量能够用于改进等离子体工艺设计。该项目利用了之前开发的现有荧光主题传感器，但使用了康涅狄格大学独特的设施和仪器，将测量扩展到更高的温度。研究人员为这个多学科项目带来了在恶劣环境下的等离子喷涂技术和激光诊断方面的丰富经验。这一努力还影响了工业发动机中的高温气体流动，我们的合作伙伴西门子西屋电气为该项目带来了无损检测和热像测量方面的丰富经验。广泛影响：该项目将支持两名研究生，他们将能够使用机械工程系和材料科学系的设施和课程。所要求的设备将为我们现有的喷雾设施配备光学诊断能力，可用于许多测量技术。除了在大学工作外，研究生还将与橡树岭国家实验室和NASA的合作者密切合作，包括进行研究访问，以充分描述项目期间产生的新材料的特征。最后，学生们将有机会在西门子西屋电力公司进行暑期实习，以便于在他们的光学发动机中测试所开发的材料。

ABSTRACTNational Science FoundationProposal Number: CTS-0553623Principal Investigator: Renfro, Michael W.Affiliation: University of ConnecticutProposal Title: GOALI: Development of temperature sensing doped particles for plasma deposition diagnosticsPlasma spray is a widely used technology for creating coatings by injecting material into a plasma prior to its striking a substrate. The temperature history of the injected material is critical in determining coating quality. However, the very high temperatures of the plasma process complicate local measurements. This research project will develop a laser fluorescence based temperature measurement that can be applied in these harsh environments and provide accurate and local instantaneous information about temperatures and heat transfer to the material particles. It is believed to be the first such technique available for real time temperature measurements in these environments. Particles that are doped with a temperature sensitive material will be produced in a novel spray facility at the University of Connecticut as well as partner laboratories at Oak Ridge National Laboratories and NASA. Once these particles and diagnostics have been developed, the temperature sensitive particles produced in this project will be injected into an operating plasma spray for local particle temperature measurements. Coatings are used to protect against these high temperatures, but measurement of actual conditions in operating engines is critical to improving design of components and coatings. Measurements of high temperature gas flows in gas turbine engine parts will be performed using facilities at our industrial collaborator Siemens Westinghouse Power. Their optically accessible engines permit unique opportunities to test the high temperature materials developed for applications to better temperature management. Siemens is also participating in the proposed work by hosting graduate students as interns to facilitate technology exchange.Intellectual Merit: The measurement of temperature of injected materials in the plasma spray process is a significant source of uncertainty in the quality of coatings produced. The proposed effort will enable local, high-accuracy measurements that can be used for improved plasma process design. The project takes advantage of previous development of existing fluorescence themographic sensors but uses unique facilities and instrumentation at the University of Connecticut to extend the measurement to much higher temperatures. The investigators bring significant experience in plasma spray coating technology and laser diagnostics in harsh environments to this multi-disciplinary project. This effort also impacts high temperature gas flows in industrial engines, and our partner Siemens Westinghouse brings considerable experience in non-destructive testing and thermographic measurements to the project.Broader Impacts: The project will support two graduate students who will have access to facilities and courses in both the Mechanical Engineering and Materials Science departments. The requested equipment will outfit our existing spray facilities with optical diagnostics capabilities that can be used for many measurement techniques. In addition to work at the university, the graduate students will work closely in conjunction with collaborators at Oak Ridge National Laboratories and NASA including research visits to fully characterize the new materials generated during the project. Finally, the students will have summer internship opportunities at Siemens Westinghouse Power to facilitate testing of the developed materials in their optically accessible engines.