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International Journal of Material Science Innovations
IJMSI 2015, 3(3), 87-96
Comparison and wear behavior evaluation of Cr3C2-25%NiCr composite coated on carbon steel by two different thermal spray techniques
Department of Mechanical Engineering, Faculty of Engineering Building, University of Malaya, 50603 Kuala Lumpur,Malaysia
ABSTRACT
This study examined and compared the wear behavior of two different thermal spray-coating techniques. Plasma and high velocity oxygen fuel (HVOF) spraying are the most common types of thermal spray coating techniques that can be used to deposition different types of ceramic composites. Cr3C2-25%NiCr is well-known ceramic composite that can be used for extending the lifespan of products. The tribological and mechanical properties of them were investigated by tribometer (pin-on-disc) machine by applying different loads. The results show when the coated samples pushed against WC-6%Cr abrasive paper with maximum load, the rate of wear in the HVOF-coated sample is less than plasma-coated samples. However the average of wears and rate of weight loss in both of coated sample is not high. For this reason there is no big different between surface of samples before and after wear testing. Field emission scanning electron microscopy (FESEM) showed the distinctive microstructure of the HVOF and plasma coated samples before and after wear testing.