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Abstract

Powder metallurgy is used to obtain high strength and good toughness pistons as an application in aviation, space, and parts. Carbon nanotube CNTs were used with reinforcement ratios of (0,5,10,15,20) wt.% to nickel base, and the device used for piston is a hydraulic piston. The process was carried out at 5 tons for 3 minutes, and the pistons were processed at variable temperatures of (900,950,1000,1050˚C) for 2 hours. XRD of the composites was examined and it was found that the dominant phase of nickel at Miller parameters (111), and of carbon nanotube at (002) with crystalline stability with different sintering temperatures. As for the physical properties, the optimal reinforcement content was found to be 20 wt.% at a sintering temperature of 1050°C, as it yielded the highest density and lowest porosity, Archimedes' method was used to calculate porosity and density. Which included the apparent density at (8.6g/cm3), the true density (8.75g/cm3), the apparent porosity (10.5%), the true porosity (15.5%), and the water absorption (0.972%). This shows that the percentage of adding nano-carbon has a role in improving the structural and physical properties.

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