Rare-earth La2O3 modification of laser-clad coatings

The effect of rare-earth La2O3 on laser-clad coatings has been studied. For this purpose, nickel-based alloy powders with different contents of La2O3 were laser-clad on to a steel substrate. The clad coatings were examined and tested for microstructural features, microhardness, inclusions and phase...

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Bibliographic Details
Published in:Journal of materials science 1998, Vol.33 (14), p.3573-3577
Main Authors: Wang, Kunlin, Zhang, Qingbo, Wei, Xingguo, Zhu Yunming
Format: Article
Language:English
Subjects:
Alloy powders
Applied sciences
Coating effects
Corrosion resistance
Corrosive wear
Exact sciences and technology
Inclusions
Lanthanum oxides
Laser beam cladding
Lasers
Materials science
Metallic coatings
Metals. Metallurgy
Microhardness
Microstructure
Nickel base alloys
Phase composition
Production techniques
Protective coatings
Rare earth elements
Substrates
Surface treatment
Wear resistance
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Summary:The effect of rare-earth La2O3 on laser-clad coatings has been studied. For this purpose, nickel-based alloy powders with different contents of La2O3 were laser-clad on to a steel substrate. The clad coatings were examined and tested for microstructural features, microhardness, inclusions and phase composition. The results are compared with those for coatings without La2O3. The comparison indicates that additions of La2O3 refine the microstructure of the clad, and the coating increases its microhardness. Moreover, the wear resistance and corrosion resistance of the clad coatings are also enhanced.
ISSN:0022-2461
1573-4803
DOI:10.1023/a:1004695010456