Abstract
Fe-based amorphous coatings were prepared on the surface of 45 steel substrates via supersonic plasma spraying and laser cladding. The corrosion and wear behavior of the two different coatings were investigated. Compared with supersonic plasma spraying, laser cladding resulted in coatings with a relatively denser structure, lower porosity, less cracks, and a good metallurgical bond with the substrate. Thanks to these properties, coatings produced by laser cladding exhibit a higher ability to resist uniform corrosion and better friction and wear performance than plasma-sprayed coatings.
Highlights
Amorphous materials exhibit excellent properties compared to crystalline materials because they do not have crystal defects, such as grain boundaries and dislocations [1]
Corrosion resistance, and friction wear of the coatings and compared and analyzed the performances of the two processes
The average hardly any dendritic crystal region with a finer grain size was present. This suggests that the surface thickness of the laser cladding coatings was about 150 μm
Summary
Amorphous materials exhibit excellent properties compared to crystalline materials because they do not have crystal defects, such as grain boundaries and dislocations [1]. Among metallic glasses (MGs), Fe-based MGs have attracted worldwide interest since the discovery of their high strength and hardness, excellent corrosion resistance and wear resistance, and relatively low material cost [2] Their engineering application is limited by their brittleness at room-temperature, size impact, and limited amorphous forming ability [3,4,5]. Fe-based amorphous coatings fabricated using the supersonic plasma spraying technology and laser cladding technology are promising materials because of their low cost, high hardness, and good abrasive wear and corrosion resistance and may be developed to provide both corrosion and wear protection [14]. Since laser cladding completely melts amorphous powders and cools and solidifies them to form coatings, the amorphous content of the coatings is low, and thermal stress and residual stress present inside the coatings generate cracks during rapid cooling [24,25]. Our results provide a basic guide for their practical application
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