Wear and Corrosion Behaviors of FeCrBSiNbW Amorphous/Nanocrystalline Coating Prepared by Arc Spraying Process

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• 作者：J. B. Cheng (12) chengjiangbo@hotmail.com
  Z. H. Wang (1)
  B. S. Xu (2)
• 关键词：amorphous phases &#8211 ; corrosion resistance &#8211 ; nanostructured materials &#8211 ; wear resistant coatings &#8211 ; wire arc spray
• 刊名：Journal of Thermal Spray Technology
• 出版年：2012
• 出版时间：September 2012
• 年：2012
• 卷：21
• 期：5
• 页码：1025-1031
• 全文大小：617.6 KB
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• 作者单位：1. College of Mechanics and Materials, Hohai University, Nanjing, 210098 China2. National Key Laboratory for Remanufacturing, Beijing, 100072 China
• ISSN：1544-1016

文摘

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 α-(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.%).