Oxidation Resistance of Vacuum Plasma Sprayed CoNiCrAlY Coatings Modified by Filtered Cathodic Vacuum Arc Deposition Aluminizing

Oxidation Resistance of Vacuum Plasma Sprayed CoNiCrAlY Coatings Modified by Filtered Cathodic Vacuum Arc Deposition Aluminizing

The vacuum plasma sprayed CoNiCrAlY coatings are modified by filtered cathodic vacuum arc deposition aluminizing. The microstructure and oxidation resistance of the coatings are investigated. The parabolic law is obeyed for the aluminized coatings after oxidation at 1100 °C for 100 h. Its parabolic...

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Veröffentlicht in:Journal of thermal spray technology 2013-02, Vol.22 (1), p.69-74
Hauptverfasser: Jiang, Jie, Zhao, Huayu, Zhou, Xiaming, Tao, Shunyan, Ding, Chuanxian
Format: Artikel
Sprache:eng
Schlagworte:
Analytical Chemistry
Applied sciences
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion
Corrosion and Coatings
Corrosion environments
Exact sciences and technology
Machines
Manufacturing
Materials Science
Metallic coatings
Metals. Metallurgy
Peer Reviewed
Processes
Production techniques
Surface treatment
Surfaces and Interfaces
Thin Films
Tribology
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Zusammenfassung:The vacuum plasma sprayed CoNiCrAlY coatings are modified by filtered cathodic vacuum arc deposition aluminizing. The microstructure and oxidation resistance of the coatings are investigated. The parabolic law is obeyed for the aluminized coatings after oxidation at 1100 °C for 100 h. Its parabolic kinetic constant is 0.080 mg 2 /cm 4  h, which is lower than that of as-sprayed coatings. The continuous and dense Al 2 O 3 scale is formed earlier due to the increase of Al concentration, and the spinels hardly exist. The oxidation resistance is improved obviously after filtered cathodic vacuum arc deposition aluminizing.
ISSN:1059-9630
1544-1016
DOI:10.1007/s11666-012-9866-7