INFLUENCE OF COMPACTING PRESSURE AND SINTERING TEMPERATURE EFFECT ON MICROSTRUCTURE CHARACTERISTICS AND TRIBOLOGICAL PERFORMANCE OF NI–CR–MOS2-BASED COMPOSITE

Vilas K. Matsagar and Prashant B. Kushare ()
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Vilas K. Matsagar: Mechanical Engineering Department, K.K.Wagh Institute of Engineering Education and Research, Nashik, Maharashtra 422003, India
Prashant B. Kushare: Mechanical Engineering Department, K.K.Wagh Institute of Engineering Education and Research, Nashik, Maharashtra 422003, India

Surface Review and Letters (SRL), 2025, vol. 32, issue 11, 1-11

Abstract: Ni–Cr–MoS2-based composite’s microstructure and wear behavior were examined in relation to compacting pressure and sintering temperature. The tribological performance of Ni-Cr–MoS2 composite against En32 martial is examined in this research in relation to the nodule count, particle count, and average area depending on the compacting pressure and sintering temperature. The green pallets were cylindrical in shape and had a diameter of 12.5 mm × 30 mm. They were pressed at room temperature (28∘C) with axial pressures of 220 MPa, 275 MPa, and 330 MPa, then sintered in two batches at different sintering temperatures of 900∘C and 1000∘C. By using Image analysis, the amount of nodules, their size, particle counts, particle sizes, and lubricant flakes of developed composite are investigated. The typical nodule size ranges from 46 μm to 60 μm, and the average nodule percentage is between 67 and 79 present in Ni–Cr–MoS2-based composite. Particle counts ranged at present from 29 to 516 depending on the sintering temperature and compacting pressure. Up to 1.1472 μm, lubricant flake lengths were nearly the same for composite for the different compacting pressure and sintering. With varying compacting pressures and sintering temperatures, the coefficient of friction and wear rate varied for the developed Ni–Cr–MoS2 composite. The impact of the nodule, nodule counts, particle and particle size is also present on the developed composites for friction and wear. Minimum wear rate observed for composite sintered was under 1000∘C temperature, and maximum wear rate was 7.55E−8 mm3/Nm for low compacting pressure and 900∘C sintering temperature.

Keywords: Image analysis; microstructure characterization; friction and wear (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1142/S0218625X24501373

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