Paper Title:
Characterization and Evaluation of EB-PVD Thermal Barrier Coatings by Impedance Spectroscopy
  Abstract

Two layer thermal barrier coatings (TBCs) were prepared by EB-PVD (Electron Beam-Physical Vapor Deposition) at different substrate temperatures in the range of 823 to 1123K, and their microstructure was investigated with SEM and AC impedance as a function of substrate temperature and thermal cycling time. YSZ layer of all TBCs samples is in column structure, but the grain size and growth orientation are different with substrate. In this research, impedance spectra (IS) was measured as a function of thermal cycling between 1323K and 298K for these thermal barrier coatings. Grain boundary and bulk can be distinguished from analysis of AC impedance spectroa to provide information about the relation between microstructure and electric properties.The change in IS until failure was found to be related with the thickness, microcracks and macrocracks of TGO and the change in the interfacial of TGO/YSZ.

  Info
Periodical
Materials Science Forum (Volumes 475-479)
Main Theme
Edited by
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
Pages
3997-4000
DOI
10.4028/www.scientific.net/MSF.475-479.3997
Citation
C. X. Zhang, F. S. Liu, S. K. Gong, H. B. Xu, "Characterization and Evaluation of EB-PVD Thermal Barrier Coatings by Impedance Spectroscopy ", Materials Science Forum, Vols. 475-479, pp. 3997-4000, 2005
Online since
January 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Bum Rae Cho
Abstract:Indium tin oxide (ITO) used in many applications such as electronic and optical devices were deposited on the soda lime glass substrate by...
195
Authors: Feng Gao, Qing Nan Zhao, Xiu Jian Zhao, Yu Hong Dong
Abstract:Silicon Nitride thin films were deposited on glass substrates by r.f. magnetron sputtering with a mixture gas of N2 and Ar. The properties of...
1391
Authors: Jung Ho Lee, Ji Hong Kim, Kang Min Do, Byung Moo Moon, Sung Jae Joo, Wook Bahng, Sang Cheol Kim, Nam Kyun Kim, Sang Mo Koo
Chapter 5: Processing of SiC
Abstract:The characteristics of Ga-doped zinc oxide (GaZnO) thin films deposited at different substrate temperatures (TS~250 to 550oC) on 4H-SiC have...
849
Authors: Fei Xiong Mao, Tao Liu, Shi Wei Liu, Jing Kun Yu
Chapter 16: Sustainable Manufacturing Technologies
Abstract:Mg films were prepared by magnetron sputtering on zirconia substrate. The surface morphology, structure and adhesion performance were...
2834
Authors: Ning Wang, Jing Wang, Fu Wei Zheng, Yu Min Wu, Bao Rong Hou
Chapter 5: Thin Film, Membrane and Coating Materials
Abstract:This paper compares the microstructure and electrochemical properties of the diamond-like carbon films obtained by two different deposition...
1029