Journal
SURFACE ENGINEERING
Volume 26, Issue 3, Pages 209-215Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/174329409X409521
Keywords
Amorphous and nanocrystalline phases; Coatings; Microstructure; Elevated temperature erosion
Categories
Funding
- Key Natural Science Foundation of China [50735006]
- National Key Laboratory for Remanufacturing [914OC85020508OC85]
- Key laboratory for Advanced Materials Processing Technology
- Ministry of Education, China [200802]
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Fe-Cr-B-Si-Mn-Nb-Y and Fe-B-Si-Nb-Cr amorphous/nanocrystalline coatings were fabricated by wire arc spray process. The microstructure and phase compositions of the coatings were characterised by means of SEM, EDAX and XRD. The formation mechanism of amorphous phase and nanocrystalline phase was discussed. The elevated temperature erosion behaviour of the coatings was also investigated using an air solid particle erosion rig. The microstructures of the coatings consist of amorphous phase and alpha-(Fe, Cr) nanocrystalline phase. Both coatings are fully dense with low porosity. The coatings exhibit better erosion resistance at lower impact angles. With increasing erosion temperature, the erosion rates of the coatings decrease. The Fe-B-Si-Nb-Cr coating has better elevated temperature erosion resistance than that of the Fe-Cr-B-Si-Mn-Nb-Y coating.
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