Journal
CORROSION SCIENCE
Volume 175, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.108896
Keywords
CrAlN coating; CrAlSiN coating; Oxidation resistance; Microstructure; Nitrogen bubble
Funding
- National Science and Technology Major Project [2017ZX06002004]
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CrAlN and CrAlSiN coatings were deposited on Zircaloy samples by multi-arc ion plating (MAIP) and the mi-crostructure, hardness, and oxidation resistance of the two types of coatings in high-temperature steams were investigated. The coatings can effectively protect the substrate from oxidation during exposure in 1000 degrees C steam for 2 h and can delay the oxidation of substrate for more than 15 min in 1200 degrees C steam. Mixed oxide layers formed and suppressed the elemental diffusion during oxidation. Nitrogen bubbles were found inside the mixed oxide. The CrAlSiN coatings showed better oxidation resistance but they cracked more easily.
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