Measurement of Tribological Characteristics of Composite Coating Under Different Temperatures

In the present work, the measurements of tribological properties of Mo-NiCr-WC-W blend composite coating on the mild steel substrate deposited using high velocity oxy-fuel thermal spray technique under various temperatures have been presented. Initially, the powders for coating were mixed employing a laboratory ball mill. The composite coating is done via a well-known high velocity oxy-fuel thermal spray technique. Further, different test specimens were prepared to measure the tribological behaviour and residual stress. High-temperature pin-on-disc tribometer was used to investigate the wear and friction with increasing temperature, load and sliding speed. X-ray diffraction, field emission scanning electron microscope, and micro-hardness tester were used to characterize the coating, wear track and micro-hardness of the coatings, respectively. The weight-loss method and machine output were used to analyze the coefficient of friction and specific wear rate. Based on the said test, responses have been obtained, analyzed, and discussed in detail.