Journal
CORROSION SCIENCE
Volume 177, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.108948
Keywords
Metal coatings; Zirconium; EPMA; Oxidation; Hot corrosion
Funding
- National Natural Science Foundation of China [51971181, 51971177]
- National Key R&D Program of China [2017YFB0702903]
- Fundamental Research Funds for the Central Universities [3102019TS0401]
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y To protect Nb-Si based alloys from oxidation and hot corrosion attacks at high temperatures, a novel Zr-Y modified silicide coating is fabricated by combining magnetron sputtering and pack cementation. It has been shown that the coating exerts a superior oxidation resistance (mass gain of 1.6 mg/cm(2)) than Si-Y coating (mass gain of 4.2 mg/cm(2)), which is attributed to forming a thin, compact and continuous SiO2 scale and favorable scale/coating interface. Due to possessing much better scale adherence and reduced formation rate of scale, the coating possesses a better hot corrosion resistance than substrate alloy and Si-Y coating.
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