Microstructure and properties of coatings with rare earth formed by DC-plasma jet surface metallurgy

A new method of surface modification, DC-plasma jet surface metallurgy, is proposed in order to improve wear resistance of materials. This paper reports on an experiment, in which some metallurgical coatings of iron-based alloy with different contents of La 2O 3 and CeO 2 were prepared on AISI1020 s...

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Bibliographic Details
Published in:Surface & coatings technology 2006-04, Vol.200 (16), p.4741-4745
Main Authors: Chen, Hao, Li, Hui-qi, Sun, Yu-zong, Li, Min
Format: Article
Language:English
Subjects:
DC-plasma jet surface metallurgy
Microstructure
Rare earth
Wear resistance
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Summary:A new method of surface modification, DC-plasma jet surface metallurgy, is proposed in order to improve wear resistance of materials. This paper reports on an experiment, in which some metallurgical coatings of iron-based alloy with different contents of La 2O 3 and CeO 2 were prepared on AISI1020 steel using a homemade DC-plasma jet surface metallurgy equipment. A scanning electron microscope (SEM), energy dispersive X-ray (EDX) microanalysis and X-ray diffraction analysis (XRD) were employed to observe the microstructure and analyzed the chemical compositions of coatings. The effect of RE oxide (La 2O 3 and CeO 2) on microstructure and properties of coatings was investigated. The result shows that addition of a proper amount of RE oxide (La 2O 3 and CeO 2) can refine and purify the microstructure, significantly increase microhardness and enhance the wear resistance.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2005.04.061