Journal
JOURNAL OF THERMAL SPRAY TECHNOLOGY
Volume 21, Issue 5, Pages 1025-1031Publisher
SPRINGER
DOI: 10.1007/s11666-012-9779-5
Keywords
amorphous phases; corrosion resistance; nanostructured materials; wear resistant coatings; wire arc spray
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Funding
- Natural Science Foundation of China [51105129]
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FeCrBSiNbW coatings were synthesized using robotically manipulating twin wires arc spraying system. The microstructure and mechanical properties of the coating were characterized. The coating has a laminated structure, and its porosity is 2.8%. The microstructure of the coating consists of amorphous and alpha-(Fe,Cr) nanocrystalline. The nanocrystalline grains with a scale of 20-75 nm are homogenously dispersed in amorphous matrix. The results show that FeCrBSiNbW coating has excellent wear and corrosion resistance. The wear resistance of the coating is about 4.6 times higher than that of 3Cr13 coating under the same testing condition. In 3.5% NaCl aqueous solution, the amorphous/nanocrystalline coating presents lower I (corr) values in polarization curves and higher fitted R (t) values in EIS plots than that of the 0Cr18Ni9 coating (chemical composition by EDAX analysis: C1.07-O12.38-Si0.49-Cr15.18-Mn0.89-Ni7.09-Fe62.24 at.%).
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