Title

Determining Thermal Conductivity Of Plasma Sprayed Tbc By Electrochemical Impedance Spectroscopy

Keywords

Conductivity; Impedance spectroscopy; Plasma spraying; Sintering; Thermal barrier coating; Zirconium oxide

Abstract

Thermal conductivity, K, of free-standing air plasma sprayed (APS) thermal barrier coatings (TBCs) after exposure at temperatures of 1100, 1200, and 1350 °C for 3, 10, 17, 24, and 120 h was measured using laser flash (LF) technique and differential scanning calorimeter (DSC), and correlated with the spectra of electrochemical impedance spectroscopy (EIS). High-temperature exposure of TBCs increases the thermal conductivity as well as the electrochemical conductance, CtT, with an increase in exposure temperature and exposure time. A linear relationship between thermal conductivity, K, and electrochemical conductance, CtT, has been found. The result has demonstrated that electrochemical impedance technique holds the promise enabling to assess and monitor the thermal conductivity of free-standing TBCs. © 2004 Elsevier B.V. All rights reserved.

Publication Date

1-3-2005

Publication Title

Surface and Coatings Technology

Volume

190

Issue

1

Number of Pages

90-97

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.surfcoat.2004.07.086

Socpus ID

8144231247 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/8144231247

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