TY - JOUR
T1 - The effect of preoxidation atmosphere on oxidation behavior and thermal cycle life of thermal barrier coatings
AU - Matsumoto, Mineaki
AU - Hayakawa, Kazuyuki
AU - Kitaoka, Satoshi
AU - Matsubara, Hideaki
AU - Takayama, Hiroshi
AU - Kagiya, Yukio
AU - Sugita, Yuuji
PY - 2006/12/15
Y1 - 2006/12/15
N2 - The effects of oxygen partial pressure (pO2) of the preoxidation atmosphere on the growth of thermally grown oxide (TGO) and thermal cycle life of plasma-sprayed thermal barrier coatings (TBCs) were investigated. The pO2 of the preoxidation atmosphere was controlled by using a solid-state electrochemical oxygen pump system. The purity and microstructure of continuous Al2O3 layer formed on the bond coat during preoxidation at 1050 °C were highly influenced by the pO2 of the atmosphere. The specimen preoxidized at 1050 °C under a pO2 of 10-14 to 10-15 atm, which is around the dissolution pressure of (Co, Ni)(Al, Cr)2O4 spinel, showed the lowest growth rate of TGO and the longest thermal cycle life.
AB - The effects of oxygen partial pressure (pO2) of the preoxidation atmosphere on the growth of thermally grown oxide (TGO) and thermal cycle life of plasma-sprayed thermal barrier coatings (TBCs) were investigated. The pO2 of the preoxidation atmosphere was controlled by using a solid-state electrochemical oxygen pump system. The purity and microstructure of continuous Al2O3 layer formed on the bond coat during preoxidation at 1050 °C were highly influenced by the pO2 of the atmosphere. The specimen preoxidized at 1050 °C under a pO2 of 10-14 to 10-15 atm, which is around the dissolution pressure of (Co, Ni)(Al, Cr)2O4 spinel, showed the lowest growth rate of TGO and the longest thermal cycle life.
KW - Oxygen partial pressure
KW - Preoxidation
KW - Thermal barrier coating
KW - Thermally grown oxide
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U2 - 10.1016/j.msea.2006.08.099
DO - 10.1016/j.msea.2006.08.099
M3 - Article
AN - SCOPUS:33750817899
SN - 0921-5093
VL - 441
SP - 119
EP - 125
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
IS - 1-2
ER -