YAG:YSZ composites as potential thermographic phosphors for high temperature sensor applications

Development of high temperature phosphors for sensor coatings is of current interest for a number of technology sectors. Significant advances in production of high temperature sensing thermal barrier coatings (TBCs) have been made in recent years. However, there is still a requirement to modify existing TBC systems to incorporate a phosphor component. In this work we report on the development of a composite material consisting of an active phosphor, Y3Al5O12: Dy, distributed within a YSZ matrix. The luminescence performance and lifetime decay of the composite material extends to 1200 degrees C. We also find that the composite spectrum is composed of characteristic YAG and YSZ components. (C) 2008 Elsevier B.V. All rights reserved.