Reinforcing Mechanism of WC Particles in Fe-Based Amorphous Matrix Coating on Magnesium Alloy Surface

To protect magnesium alloy surfaces from wear and corrosion, an Fe-based amorphous coating was prepared on WE43 through the Ni60 interlayer by high-velocity oxygen-fuel (HVOF) spraying. The porosity was ~1%, and the amorphous content exceeded 90%. The wear and corrosion resistance of the composite c...

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Bibliographic Details
Published in:Materials 2021-11, Vol.14 (21), p.6571
Main Authors: Zhang, Haoran, Wu, Hongyan, Wang, Shanlin, Chen, Yuhua, Huang, Yongde, Li, Hongxiang
Format: Article
Language:English
Subjects:
Bonding
Coefficient of friction
Cooling
Corrosion mechanisms
Corrosion potential
Corrosion resistance
Corrosion resistant alloys
Corrosion resistant steels
Corrosive wear
Deformation
Friction
High velocity oxyfuel spraying
Interfacial bonding
Interlayers
Iron
Lubricants & lubrication
Magnesium alloys
Magnesium base alloys
Mechanical properties
Metallurgy
Microscopy
Nickel base alloys
Particulate composites
Powder metallurgy
Protective coatings
Solid lubricants
Stainless steel
Stainless steels
Stress concentration
Substrates
Tungsten carbide
Wear resistance
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Summary:To protect magnesium alloy surfaces from wear and corrosion, an Fe-based amorphous coating was prepared on WE43 through the Ni60 interlayer by high-velocity oxygen-fuel (HVOF) spraying. The porosity was ~1%, and the amorphous content exceeded 90%. The wear and corrosion resistance of the composite coating with WC particles wrapped in a Ni layer as the reinforcing phase were compared with that of the completely amorphous coating. The friction coefficient (COF) of the composite coating was 0.3, which is only half of that of the WE43 substrate, and the composite coating exhibited a more stable wear behavior than the completely amorphous coating. The corrosion tendency of the composite coating is lower than that of stainless steel, with a corrosion potential of −0.331 V, and the addition of WC particles did not deteriorate the corrosion resistance considerably. The bonding mechanism of the bonding interface between the amorphous structure and the particles of the reinforcing phase was investigated by transmission electron microscopy (TEM). Reinforcing particles were confirmed to form metallurgical bonding with the coating. It was found that the Ni layer showed excellent bonding performance in the form of a mixture that is amorphous and nanocrystalline. Therefore, the Fe-based amorphous composite coating on a magnesium alloy surface shows a potential protective effect.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14216571