Paper Title:
Evaluation of Effect of Process Conditions on Microstructures in Plasma Sprayed Coating by In Situ Laser AE
  Abstract

In recent years, a thermal barrier coating technology becomes more important because it is required to develop materials which avoid high-temperature oxidation and corrosion. In order to ensure reliability of coating, it is necessary to understand microfracture criterion in terms of stress distribution and fracture morphology. The objective of this study is to clarify the damage generation process by comparing Acoustic Emission AE) generation behavior and thermal stress simulation result based on heat history measurement. Al2O3 as the top coat (TC) and NiCrAlY as the bond coat (BC) were sprayed to SUS304 disc or plate as a base material. AE in cooling process were detected by laser heterodyne interferometer after spraying finished. Two-dimensional axisymmetric mesh for samples was made and transient heat conductivity was analyzed for various boundary conditions. Then, using the obtained heat history, transient heat stress was analyzed and the distribution of stress elements was calculated. The fracture process of ceramic coating was evaluated from these experiments and analyses.

  Info
Periodical
Key Engineering Materials (Volumes 321-323)
Edited by
Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi
Pages
1443-1446
DOI
10.4028/www.scientific.net/KEM.321-323.1443
Citation
K. Taniguchi, S. Nishinoiri, M. Enoki, K. Tomita, "Evaluation of Effect of Process Conditions on Microstructures in Plasma Sprayed Coating by In Situ Laser AE", Key Engineering Materials, Vols. 321-323, pp. 1443-1446, 2006
Online since
October 2006
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: Zeng Yi, Xue Bin Zheng, Heng Ji, Wei Wu, Soo Wohn Lee
Abstract:The W coatings were prepared by applying the vacuum plasma spraying process (VPS). The phase composition, microstructure and laser...
849
Authors: Bong Hwan Kim, Sang Mok Lee
Abstract:Al-Cu-Fe-B quasicrystalline and Mo coatings were obtained on the mild steel and brass substrates by thermal spraying routes for the purpose...
715
Authors: Satoru Takahashi, Masaki Hatano, Yoshitaka Kojima, Yoshio Harada, Akira Kawasaki, Fumio Ono
Abstract:Thermal cycle resistance of Ni-20Cr, Ni-50Cr and CoNiCrAlY coatings produced by air plasma spraying was investigated according to Japanese...
296
Authors: Zong Yin Duan, Dong Sheng Wang
Chapter 12: Laser Processing Technology
Abstract:This paper deals with the microstructure and thermal shock behavior of laser remelting of yttria-stabilized zirconia (YSZ) thermal barrier...
2502
Authors: Ren Guo Song, Pu Hong Tang, Chao Wang, Guo Lu
Chapter 2: Surface Engineering/Coatings
Abstract:Al2O3 and Al2O3-40wt.%TiO2 ceramic coatings on H13 hot-worked die steel have been...
235