Open AccessEMBEDDED OPTICAL SENSORS FOR THERMAL BARRIER COATINGS
Author(s) -
David R. Clarke
Publication year - 2004
Language(s) - English
Resource type - Reports
DOI - 10.2172/843110
Subject(s) - luminescence , dopant , materials science , cubic zirconia , yttria stabilized zirconia , doping , thermal barrier coating , erbium , europium , lanthanide , optoelectronics , coating , nanotechnology , composite material , ceramic , ion , chemistry , organic chemistry
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