Nondestructive evaluation of the oxidation stresses through thermal barrier coatings using Cr3+piezospectroscopy
作者:
R. J. Christensen,
D. M. Lipkin,
D. R. Clarke,
K. Murphy,
期刊:
Applied Physics Letters
(AIP Available online 1996)
卷期:
Volume 69,
issue 24
页码: 3754-3756
ISSN:0003-6951
年代: 1996
DOI:10.1063/1.117182
出版商: AIP
数据来源: AIP
摘要:
The stresses in the aluminum oxide formed during high‐temperature oxidation of a bond‐coated superalloy are shown to be measurable through zirconia thermal barrier coatings. The basis for the measurements is the piezospectroscopic shift in theR‐line fluorescence (photoluminescence) from Cr3+impurities incorporated into the growing aluminum oxide scale. Measurements through the thermal barrier coating are feasible because (partially stabilized) zirconia coatings have some transparency at both the excitation and at fluorescence frequencies. ©1996 American Institute of Physics.
点击下载:
PDF
(180KB)
返 回