Abstract
SiC fibre (SiCf) reinforced CrB2 composite was prepared by hot pressing at 1700 °C. The developed composite was characterized by microstructural characterization and mechanical property measurement. Friction and wear properties of the hot pressed CrB2 + 10%SiCf have been investigated under reciprocative sliding, using a counter body of cemented tungsten carbide (WC-Co) ball. Coefficient of friction and wear rate were established. Wear mechanism has been analysed by using optical microscopy, scanning electron microscopy-energy dispersive spectroscopy and optical profilometer techniques. Higher than 95% density was obtained by hot pressing SiCf reinforced CrB2 at 1700 °C. Fracture toughness of the developed composite was measured to be 5.4 MPa m1/2, which is 54% higher as compared to that of monolithic CrB2. The coefficient of friction (COF) was measured to be 0.33 at 20 N load and 10 Hz frequency. Specific wear rate of CrB2 + SiCf has been found to be about 10−7 mm3/N m. Tribochemical reaction is shown to be the dominant wear mechanism in the present system.
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Sonber, J.K., Murthy, T...S.R.C., Sairam, K. et al. Development and tribological properties of SiC fibre reinforced CrB2 composite. J Aust Ceram Soc 53, 309–317 (2017). https://doi.org/10.1007/s41779-017-0039-5
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DOI: https://doi.org/10.1007/s41779-017-0039-5