Abstract
Despite numerous studies focusing on the use of stainless steel (SS316L) in high-temperature tribological applications, there remains a significant research gap regarding the improvement of its sustainability and lifetime in these harsh conditions. Herein, the plasma-sprayed graphene nanoplatelets (GNPs) reinforced yttria stabilized zirconia (YSZ) coating was deposited over SS316L to enhance its viability for high-temperature tribological applications. The coatings have been deposited using fused and crushed powder to improve the sintering resistance of the coatings. The structural and mechanical properties of coatings were observed using XRD, Raman, FE-SEM, and Vickers microhardness, respectively. The composite coating offered a significant improvement in the reduction of wear rate (∼45 % compared to YSZ coating) at 873 K and coefficient of friction by ∼51 % from 300 K to 873 K. Further, the findings were investigated by Raman spectroscopy, High-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy analysis to understand the effect of GNPs reinforcement. This study provides a pathway to improve the applicability of SS316L for high-temperature (up to 873 K) tribological applications.
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