Nondestructive evaluation of the oxidation stresses through thermal barrier coatings using Cr3+ piezospectroscopy Academic Article

abstract

• 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 the R-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.

authors

• Lipkin, Don

published proceedings

• APPLIED PHYSICS LETTERS

altmetric score

• 3

author list (cited authors)

• Christensen, R. J., Lipkin, D. M., Clarke, D. R., & Murphy, K.

citation count

• 202

complete list of authors

• Christensen, RJ||Lipkin, DM||Clarke, DR||Murphy, K

publication date

• December 1996

publisher

• AIP Publishing  Publisher

published in

• Applied Physics Letters  Journal

keywords

• 40 Engineering

Digital Object Identifier (DOI)

• 10.1063/1.117182

start page

• 3754

end page

• 3756

volume

• 69

issue

• 24

URL

• http://dx.doi.org/10.1063/1.117182