Effect of CeO2 on Impact Toughness and Corrosion Resistance of WC Reinforced Al-Based Coating by Laser Cladding

WC reinforced Al-based coating with added CeO2 was prepared on the surface of S420 steel by laser cladding. The microstructure and structure of the coatings were analyzed by scanning electron microscope, X-ray diffractometer and optical profiler. The mechanical properties and corrosion properties of...

Full description

Saved in:
Bibliographic Details
Published in:Materials 2019-09, Vol.12 (18), p.2901
Main Authors: Wang, Weizhan, Chen, Zhigang, Feng, Shunshan
Format: Article
Language:English
Subjects:
Bonding strength
Cerium oxides
Corrosion effects
Corrosion resistance
Electrodes
Impact resistance
Impact strength
Impact tests
Laser beam cladding
Lasers
Mechanical properties
Metallurgy
Microhardness
Microstructure
Morphology
Offshore
Optical properties
Particle size
Protective coatings
Sliding friction
Spectrum analysis
Substrates
Toughness
Tungsten carbide
Water area
Wear resistance
Work stations
Workstations
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:WC reinforced Al-based coating with added CeO2 was prepared on the surface of S420 steel by laser cladding. The microstructure and structure of the coatings were analyzed by scanning electron microscope, X-ray diffractometer and optical profiler. The mechanical properties and corrosion properties of the coatings were studied by microhardness tester, friction and wear tester, Charpy impact tester, and electrochemical workstation. The results show that the coating is mainly composed of Al-phase, continuous-phase, and hard reinforced-phase WC, and the coating and substrate show good metallurgical bonding. When the content of CeO2 is 1%, the fine grain strengthening effect is obvious, and the impact toughness of the coating is obviously improved. Appropriate amount of rare earth CeO2 can significantly improve the hardness of the coating. When the content of CeO2 is more than 1%, the wear resistance of the coating decreases. The coating prepared with different CeO2 content has higher impedance and corrosion resistance than that of the substrate. At 1% CeO2 content, the coating has the best corrosion resistance.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma12182901