Electromagnetic properties of plasma sprayed thermal barrier coatings in terahertz range

Author

Watanabe, M. ; Kuroda, S. ; Yamawaki, H. ; Shiwa, M.

Author_Institution

Nat. Inst. for Mater. Sci., Tsukuba, Japan

fYear

2009

fDate

21-25 Sept. 2009

Firstpage

1

Lastpage

2

Abstract

Dielectric properties of yttria partially stabilized zirconia thermal barrier coatings with various pore density were investigated by terahertz time domain spectroscopy in the continuous frequency range of 0.3 ~ 1.3 THz. The real part of the refractive index was 4.2 ~ 4.8 and the value increases as the porosity decreases. It indicates the potential application of terahertz spectroscopy to inspect the microstructure of plasma sprayed coatings nondestructively.

Keywords

dielectric materials; plasma arc sprayed coatings; porosity; refractive index; terahertz wave spectra; thermal barrier coatings; yttrium compounds; zirconium compounds; ZrO₂-Y₂O₃; aeroengine; electromagnetic properties; frequency 0.3 THz to 1.3 THz; gas turbines; inspection; microstructure; nondestructive testing; plasma sprayed thermal barrier coatings; porosity; refractive index; terahertz time domain spectroscopy; Coatings; Dielectrics; Electrochemical impedance spectroscopy; Frequency; Microstructure; Plasma applications; Plasma density; Plasma properties; Refractive index; Thermal spraying;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on

Conference_Location

Busan

Print_ISBN

978-1-4244-5416-7

Electronic_ISBN

978-1-4244-5417-4

Type

conf

DOI

10.1109/ICIMW.2009.5324598

Filename

5324598