| THE INFLUENCE OF Mo DIFFUSION ON THE THERMAL BEHAVIOR OF TBCs ON Ni_3Al BASED ALLOY IC-6 |
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| 作者姓名： | D.B. Zhang S.K. Gong H.B. Xu Y.F. Han |
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| 作者单位： | D.B. Zhang，S.K. Gong，H.B. Xu and Y.F. Han Department of Materials Science and Engineering，Beijing University of Aeronautics and Astronautics，Beijing 100083，ChinaCast Superalloy Laboratory，Beijing Institute of Aeronautical Materials，Beijing |
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| 基金项目： | This work is sponsored by the National Natural Science Foundation of China (NFSC) and Specialized Research Fund for the Doctoral Program of Higher Education of China (SRFDP). |
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| 摘 要： | Conventional two-layered structure thermal barrier coatings (TBCs) were prepared onto γ'-Ni3Al based alloy IC-6 by electron beam physical vapor deposition (EB-PVD). Isothermal oxidation and thermal cycling tests were carried out to investigate the effect of Mo content at the interface between bond coat and ceramic top coat caused by diffusion. It has been found that the alloy coated with TBCs presented the lowest oxidation weight gain value for the reason that the ceramic top coat in TBC system can effectively stop Mo oxides evaporating. The life time of TBCs has close relation with Mo content at the interface between the bond coat and top coat. Spaliation of ceramic top coat occurred during thermal cyclic testing when Mo atoms accumulated at the interface up to certain amount to decline the combination between the bond coat and top coat.
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| 收稿时间： | 2001-07-31 |
THE INFLUENCE OF Mo DIFFUSION ON THE THERMAL BEHAVIOR OF TBCs ON Ni3Al BASED ALLOY IC-6 |
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| D.B. Zhang
, S.K. Gong
, H.B. Xu
, Y.F. Han.THE INFLUENCE OF Mo DIFFUSION ON THE THERMAL BEHAVIOR OF TBCs ON Ni_3Al BASED ALLOY IC-6[J].Acta Metallurgica Sinica(English Letters),2002,15(1):45-48. |
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| Authors: | DBZhang SKGong HBXu YFHan |
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| Affiliation: | 1. Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics,Beijing 100083, China
2. Cast Superalloy Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China |
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| Abstract: | Conventional two-layered structure thermal barrier coatings (TBCs) were preparedonto γ'-Ni3Al based alloy IC-6 by electron beam physical vapor deposition (EB-PVD).Isothermal oxidation and thermal cycling tests were carried out to investigate theeffect of Mo content at the interface between bond coat and ceramic top coat causedby diffusion. It has been found that the alloy coated with TBCs presented the lowestoxidation weight gain value for the reason that the ceramic top coat in TBC systemcan effectively stop Mo oxides evaporating. The life time of TBCs has close relationwith Mo content at the interface between the bond coat and top coat. Spallation ofceramic top coat occurred during thermal cyclic testing when Mo atoms accumulatedat the interface up to certain amount to decline the combination between the bond coatand top coat. |
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| Keywords: | EB-PVD thermal barrier coatings (TBCs) thermal cyclic diffusion |
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