Abstract
NiCr coatings with different contents of La2O3 were produced on carbon steel by flame spray and then furnace fused processing. A field emission gun scanning electron microscope (FEGSEM), energy dispersive X-ray (EDX) microanalysis and X-ray diffraction analysis (XRD) were employed to observe the microstructure characteristics of the coatings. The effect of La2O3 on microstructure and mechanical properties of coatings was investigated. The result shows that the addition of La2O3 would refine and purify the microstructure of the coatings, when the addition of La2O3 is about 0.8 wt.%, the coatings obtain the highest hardness.
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