Abstract
In this study, NiCrBSi-30 wt.% TiN composite (NTC) coating was produced on carbon steel via plasma spraying, with NiCrBSi-30 wt.% WC composite (NWC) coating as the comparison object. The microstructure and phase constituents of the composite coatings were characterized using scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS) techniques, transmission electron microscopy (TEM) and x-ray diffraction (XRD). Atomic force microscopy (AFM) was used to measure electronic work functions. The microhardness and wear performance of coatings were also investigated. The average microhardness of the NTC and NWC coatings was 1000 HV and 850 HV, respectively. In addition, the NTC coating had a wear volume loss of 0.8118 mm3, less than 1.4772 mm3, the volume loss of the NWC coating. This was due to the presence of TiN in the form of nanograins in the composite coating and tighter binding to the matrix.
Highlights
Plasma spraying technology is widely used in industrial production to prepare various protective coatings [1,2]
The materials used for plasma spraying are metal-based composites, which consist of a metal matrix with good toughness and reinforcing ceramic particles [4]
The NiCrBSi-30 wt.% TiN composite (NTC) coating was formed by spraying Ti and enhancement of coatings for its high hardness, wear resistance, and good corrosion resistance [17,18,19]
Summary
Plasma spraying technology is widely used in industrial production to prepare various protective coatings [1,2]. Materials 2018, 11, x FOR PEER REVIEW of the NWC coating is related to the intergranular cracks generated by the separation of WC/W2C and Ni-based matrix crystals These cracks are due to the thermal stress caused by the rapid cooling. Previous studies composite coating by mechanically mixing decarburization forms aprepared softer WNiCrBSi-TiN phase, resulting in lower hardness of the coating [16].Ni-based. Except for the above-mentioned reinforcing phase particles, TiN has been widely used for the melting point (2950 K) [20] In this experiment, the NTC coating was formed by spraying Ti and enhancement of coatings for its high hardness, wear resistance, and good corrosion resistance [17,18,19]. TiN particles in the composite coating are in a fully molten state and bond well
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