Paper Title:
Thermal Shock Behavior of Nano-Structured Functionally Graded Thermal Barrier Coatings Deposited by Supersonic Plasma Spray
  Abstract

The nano-structured functionally graded 8YSZ/NiCoCrAlY thermal barrier coatings (FG-TBCs) were prepared using a recently developed Supersonic Plasma Spraying (S-PS) system with dual powder feed ports. The alloy powders were fed into the lower temperature regions of the plasma plume through one of them to prevent it over molten and oxidation. The ceramic powders were fed into high temperature regions through another for fully melted. The thermal shock behavior of the FG-TBCs were investigated. It was found the totally 1mm thick FG-TBCs layer still maintained nano-structure form by TEM, and also exhibited a finely lamellate microstructure mixed by alloy and ceramic with gradient along the thickness direction by SEM. The FG-TBCs exhibit excellent thermal shock resistance due to it was still perfect without any spallation after thermal shock test over 200 cycles under heating by oxygenacetylene flam to 1250°C in 30s and then quenching into ambient water.

  Info
Periodical
Key Engineering Materials (Volumes 336-338)
Edited by
Wei Pan and Jianghong Gong
Pages
2624-2627
DOI
10.4028/www.scientific.net/KEM.336-338.2624
Citation
Z. H. Han, H. J. Wang, S. K. Zhou, B. S. Xu, "Thermal Shock Behavior of Nano-Structured Functionally Graded Thermal Barrier Coatings Deposited by Supersonic Plasma Spray", Key Engineering Materials, Vols. 336-338, pp. 2624-2627, 2007
Online since
April 2007
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: Mu Qin Li, Da Shan Shang, Chen Ma, Shi Qin Yang
Abstract:Bioactive composite coatings containing sub-layer and working-layer with different ingredients were prepared using subsonic thermal spraying...
1619
Authors: Yong Yee Kim, Young Min Park, Hoy Yul Park, Hong Chae Park, Seog Young Yoon
Abstract:Monodispersed Cu powders were prepared in aqueous solution through a wet-reduction process with hydrazine hydrate (N2H4·H2O). In particular,...
2118
Authors: Zhen Bing Cai, Min Hao Zhu, Xiu Zhou Lin, Ji Liang Mo, Zhong Rong Zhou
Abstract:Nickel base Ni60 and cobalt base Co-Cr-W coatings were prepared on substrate of refractory alloy steel 4Cr14NiW2Mo by laser-cladding...
878
Authors: Qiang Shen, Chang Lian Chen, Fei Chen, Qi Wen Liu, Lian Meng Zhang
Abstract:Porous calcia stabilized zirconia ceramics (CSZC) with closed pores were presurelessly sintered by adding different contents of zirconia...
435
Authors: Cheng Long Yu, Xin Hao, Hong Tao Jiang, Li Li Wang, Zheng Guang Zhang, Xiu Feng Wang
Chapter 1: Materials Science and Engineering
Abstract:α-Al2O3 platelets were prepared in the interface of Na2O-CaO-SiO2 glass induced by Al. The...
110