Journal
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
Volume 18, Issue 1, Pages 130-139Publisher
ELSEVIER URBAN & PARTNER SP Z O O
DOI: 10.1016/j.acme.2017.05.004
Keywords
Palladium coatings; CVD process; Degradation; Oxidation
Funding
- National Science Centre, Poland (NCN) [2015/19/B/ST8/01645]
Ask authors/readers for more resources
Palladium layer (7 mu m thick) was deposited on the surface of the Inconel 713 LC, Inconel 625 and CMSX 4 Ni-base superalloys by the electroplating method. Electroplated samples were annealed at 1050 degrees C for 2 h in the argon atmosphere. The aluminide coatings were deposited by the CVD method. The nonmodified aluminide coating consists of the NiAl phase. Palladium modification let to formation of the (Ni, Pd) Al phase in coatings. The palladium modified as well as nonmodified coatings were oxidized at 1100 degrees C in the air atmosphere. For both Inconel 713 LC and CMSX 4 superalloys palladium modified coatings show better oxidation resistance than nonmodified ones. Palladium inhibits the outward diffusion of substrate elements (cobalt and chromium) during oxidation of the aluminide coating. Moreover, it stabilizes the beta-NiAl phase, keeps the higher content of aluminum in the beta-NiAl phase for a long time and thus increases the lifetime of the coated substrate. (C) 2017 Politechnika Wroclawska. Published by Elsevier Sp. z o.o. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available