GOALI: Oxide Scale Development in Coated High-Temperature Alloys for Solid-Oxide Fuel Cell Interconnects

GOALI项目的研究目标是阐明固体氧化物燃料电池(SOFC)高温合金互连线上导电氧化物涂层结构演变的机制。这项研究将使人们对互扩散、反应层形成和外加电场对氧化物涂层的结构和电学特性的作用有一个更基本的理解。该研究方法利用脉冲激光沉积来制备具有当代SOFC涂层和中间层的化学成分的模型涂层，但其形貌更适合于良好控制的机理研究。使用先进的离子束和电子束分析技术，模型涂层和中间层中沉积后的结构发展将被表征为曝光条件的函数。从模型涂层/中间层获得的数据将被用作氧化物鳞片发展和性能的多层模型的关键输入。该项目的成功完成将为更好地对现有涂层合金SOFC互连的寿命和具有优异性能的新涂层的性能进行预测建模奠定基础。该项目是康涅狄格大学(UConn)和联合技术研究中心(UTRC)的合作项目，将涉及康涅狄格大学的全日制研究生和UTRC兼职攻读UConn研究生学位的员工。这些学生将受益于正规的研究生教育和通过参与这两个地点的研究而进行的实践培训。这些学生还将参与该组织更广泛的教育外展活动，旨在将MSE的欣赏带给当地的K-12学生。这项研究的主要成果将通过以下方式传播：在公开文献中发表，在会议上介绍，在世界贸易与合作中心举办的讲习班，以及将实例纳入宣传材料。

The research objective of this Grant Opportunity for Academic Liaison with Industry (GOALI) project is to elucidate the mechanisms that are responsible for structural evolution in conductive oxide coatings on high-temperature alloy interconnects for solid oxide fuel cells (SOFCs). The research will result in a more fundamental understanding of the roles of interdiffusion, reaction layer formation and applied electric field on the structural and electrical characteristics of oxide coatings. The research approach utilizes pulsed laser deposition to produce model coatings with the chemistries of current generation SOFC coatings and interlayers but with morphologies that are better suited to well-controlled mechanistic studies. Post-deposition structural development in model coatings and interlayers will be characterized as a function of exposure conditions using advanced ion- and electron-beam analysis techniques. The data obtained from the model coatings/interlayers will be used as critical inputs to multi-layer models of oxide scale development and properties. The successful completion of this project will provide the basis for better predictive modeling of lifetimes for existing coated alloy SOFC interconnects and of the properties for new coatings with superior properties.This GOALI project is a collaboration between the University of Connecticut (UConn) and United Technologies Research Center (UTRC) and will involve both full-time UConn graduate students and UTRC employees pursuing UConn graduate degrees on a part-time basis. These students will benefit both from formal graduate education and from hands-on training through involvement in the research at both sites. The students will also be involved in the broader educational outreach activities of the group aimed at bringing an appreciation of MSE to local K-12 students. Key results from the research will be disseminated through: publication in the open literature, presentation at conferences, workshops held at UTRC, and integration of examples into outreach materials.