Interface Microstructure and Tribological Properties of Flame Spraying NiCr/La2O3 Coatings

• Published in: Journal of thermal spray technology Vol. 23; no. 8; pp. 1404 - 1412
• Main Authors: Zhang, Zhenyu, Liang, Bunv, Guo, Hongjian
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-12-2014; Springer
• Subjects: Analytical Chemistry; Applied sciences; Characterization and Evaluation of Materials; Chemistry and Materials Science; Contact of materials. Friction. Wear; Corrosion and Coatings; Exact sciences and technology; Machines; Manufacturing; Materials Science; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Peer Reviewed; Processes; Production techniques; Surface treatment; Surfaces and Interfaces; Thin Films; Tribology; lanthanum oxide; tribological properties; interface; NiCr alloy; wear resistance; Lanthanide; Mechanical properties; Coatings; Surface treatment; Lanthanum oxide; Wear; Wear resistance; Microstructure; Interface; Flame spraying; Tribology
• ISSN: 1059-9630; 1544-1016
• DOI: 10.1007/s11666-014-0164-4

NiCr alloy coatings with 0.5, 1.0, 1.5 and 2.0 wt.% of La
2
O
3
were deposited on 1045 carbon steel by a flame spraying and melting processing. Interface microstructure investigations of the coating/substrate systems were conducted by field emission gun scanning electron microscopy, with attached energy dispersive spectroscopy. The effect of La
2
O
3
addition on the tribological properties of the coatings was investigated under dry sliding wear conditions. The result showed that the microstructure of the NiCr alloy coatings are refined with proper amounts of La
2
O
3
, and the microhardness and wear resistance of the coatings show best enhancement with 1.0% La
2
O
3
.