EMBEDDED OPTICAL SENSORS FOR THERMAL BARRIER COATINGS

Clarke, David R.

University of California

关键词: Luminescence;    Rare Earths;    Europium;    36 Materials Science;    Thermal Insulation;   

DOI  :  10.2172/843110
RP-ID  :  NONE
RP-ID  :  FG26-03NT41794
RP-ID  :  843110

美国|英语

来源: UNT Digital Library

【 摘 要 】

In this first year of the program we have focused on the selection of rare-earth dopants for luminescent sensing in thermal barrier coating materials, the effect of dopant concentration on several of the luminescence characteristics and initial fabrication of one type of embedded sensor, the ''red-line'' sensor. We have initially focused on erbium as the lanthanide dopant for luminescence doping of yttria-stabilized zirconia and europium as the lanthanide for luminescence doping of gadolinium zirconate. The latter exhibits a temperature-dependent luminescence lifetime up to at least 1100 C. A buried layer, ''red-line'' sensor in an electron-beam deposited yttria-stabilized zirconia coating with erbium has been demonstrated and exhibits a temperature-dependent luminescence lifetime up to at least 400 C.