Comparative study of the slurry erosion behavior of laser cladded Ni-WC coating modified by nanocrystalline WC and La2O3

The erosion performance of laser cladded Ni-60 %WC coatings subjected to a controllable abrasive water jet (AWJ) was investigated. The erosion resistance of Ni-60 %WC coatings at varied linear laser energy (from 315 to 700 J/mm) was examined under different impinging angles of a slurry jet. The chem...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2015-08, Vol.79 (9-12), p.1607-1621
Main Authors: Farahmand, Parisa, Frosell, Thomas, McGregor, Molly, Kovacevic, Radovan
Format: Article
Language:English
Subjects:
Abrasive erosion
Abrasives
Bonding strength
CAE) and Design
Chemical composition
Coatings
Comparative studies
Computer-Aided Engineering (CAD
Engineering
Erosion resistance
Grain size
Hydraulic jets
Industrial and Production Engineering
Lanthanum oxides
Lasers
Mechanical Engineering
Media Management
Nanocrystals
Organic chemistry
Original Article
Rare earth elements
Scars
Slurries
Tribology
Tungsten carbide
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Summary:The erosion performance of laser cladded Ni-60 %WC coatings subjected to a controllable abrasive water jet (AWJ) was investigated. The erosion resistance of Ni-60 %WC coatings at varied linear laser energy (from 315 to 700 J/mm) was examined under different impinging angles of a slurry jet. The chemical composition of coatings was modified by nanocrystalline WC powder and the rare earth element (La 2 O 3 ). The erosion value of Ni-60 %WC was reduced to 40 % by decreasing the laser energy from 700 to 315 J/mm. Synthesized coatings with optimal weight fraction of nano-WC particles (5 %) and La 2 O 3 (1 %) decreased the average microstructural grain size of the Ni-binder, increased the homogeneity and hardness of the coating, and consequently increased the erosion resistivity. The tribological evaluation of the erosion scars showed a log-linear relationship between coating hardness and volume loss under erosion. Adding nano-WC (5 %) and La 2 O 3 (1 %) enhanced the bonding strength between Ni and WC and no pulled out WC particles was observed after erosion test.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-015-6936-2