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

国家科学基金项目编号：CTS-0553623主要研究者： Renfro，Michael W. 康涅狄格大学提案标题：目标：开发用于等离子体沉积诊断的温度传感掺杂颗粒等离子体喷涂是一种广泛使用的技术，通过在等离子体撞击基底之前将材料注入等离子体来形成涂层。注入材料的温度历史对于确定涂层质量至关重要。然而，等离子体过程的非常高的温度使局部测量复杂化。该研究项目将开发一种基于激光荧光的温度测量方法，可应用于这些恶劣环境，并提供有关温度和材料颗粒传热的准确和局部瞬时信息。 这被认为是第一个这样的技术可用于真实的时间温度测量在这些环境中。 掺杂有温度敏感材料的颗粒将在康涅狄格大学的一个新型喷雾设施以及橡树岭国家实验室和美国宇航局的合作实验室中生产。一旦这些粒子和诊断已经开发出来，在这个项目中产生的温度敏感粒子将被注入到一个操作等离子体喷雾局部粒子温度测量。涂层用于保护这些高温，但在运行发动机的实际条件的测量是至关重要的，以改善组件和涂层的设计。燃气涡轮机发动机部件中的高温气流测量将使用我们的工业合作伙伴西门子西屋电力公司的设施进行。他们的光学可访问引擎为测试为更好的温度管理应用开发的高温材料提供了独特的机会。西门子也参与了拟议的工作，接待研究生作为实习生，以促进技术交流。智力优势：在等离子喷涂过程中，注射材料的温度测量是所生产涂层质量不确定性的重要来源。拟议的努力将使本地，高精度的测量，可用于改进等离子体工艺设计。该项目利用了现有荧光热成像传感器的先前开发，但使用了康涅狄格大学的独特设施和仪器，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等离子喷涂技术和激光诊断方面的丰富经验。这一努力也影响了工业发动机中的高温气流，我们的合作伙伴西门子西屋公司为该项目带来了在无损检测和热成像测量方面的丰富经验。更广泛的影响：该项目将支持两名研究生，他们将有机会使用机械工程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，包括研究访问，以充分表征项目期间产生的新材料。最后，学生们将在西门子西屋电力公司获得暑期实习机会，以促进在光学可访问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.