Article: Tribological performance of Cu-Gr-B4C hybrid composites prepared by powder metallurgy route Journal: International Journal of Surface Science and Engineering (IJSURFSE) 2024 Vol.18 No.4 pp.304 - 332 Abstract: This research studies the tribological capabilities of copper-based self-lubricating hybrid composites with different weights of graphite (Gr) and B4C reinforcements developed by the P/M technique. The developed materials (such as Cu-0Gr-0B4C-0Cr, Cu-1.5Gr-1.5B4C-2Cr, Cu-3Gr-3B4C-2Cr, and Cu-4.5Gr-4.5B4C-2Cr) were characterised and investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), and pin-on-disc tribometer. The composite's microstructure revealed that the reinforcing particles were dispersed uniformly across its matrix. The dry sliding wear test was accomplished at the normal load (10 N to 30 N) and sliding speeds (1 m/s and 2 m/s) for a sliding distance of 2 km. It was found that the wear rate and coefficient of friction of developed composites decrease as the reinforcing weight increases due to the lubricating action of graphite and B4C. Cu-3Gr-3B4C-2Cr displayed the highest hardness among all developed materials. However, Cu-4.5Gr-4.5B4C-2Cr exhibited the least wear. Worn surfaces were also investigated to reveal the wear mechanism involved. Inderscience Publishers - linking academia, business and industry through research

Title: Tribological performance of Cu-Gr-B₄C hybrid composites prepared by powder metallurgy route

Authors: Manish Kumar; Abhishek Kumar Singh; Manvandra Kumar Singh; Manas Ranjan Majhi; R.K. Chaturvedi

Addresses: Department of Ceramic Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India ' Department of Ceramic Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India ' Department of Mechanical Engineering, Graphic Era (Deemed to be University), Dehradun, 248002, India ' Department of Ceramic Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India ' Department of Ceramic Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India

Abstract: This research studies the tribological capabilities of copper-based self-lubricating hybrid composites with different weights of graphite (Gr) and B₄C reinforcements developed by the P/M technique. The developed materials (such as Cu-0Gr-0B₄C-0Cr, Cu-1.5Gr-1.5B₄C-2Cr, Cu-3Gr-3B₄C-2Cr, and Cu-4.5Gr-4.5B₄C-2Cr) were characterised and investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), and pin-on-disc tribometer. The composite's microstructure revealed that the reinforcing particles were dispersed uniformly across its matrix. The dry sliding wear test was accomplished at the normal load (10 N to 30 N) and sliding speeds (1 m/s and 2 m/s) for a sliding distance of 2 km. It was found that the wear rate and coefficient of friction of developed composites decrease as the reinforcing weight increases due to the lubricating action of graphite and B₄C. Cu-3Gr-3B₄C-2Cr displayed the highest hardness among all developed materials. However, Cu-4.5Gr-4.5B₄C-2Cr exhibited the least wear. Worn surfaces were also investigated to reveal the wear mechanism involved.

Keywords: metal matrix composites; MMCs; powder metallurgy; wear; hardness; worn surfaces.

DOI: 10.1504/IJSURFSE.2024.142235

International Journal of Surface Science and Engineering, 2024 Vol.18 No.4, pp.304 - 332

Received: 02 Dec 2023
Accepted: 15 Mar 2024
Published online: 15 Oct 2024 *

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Title: Tribological performance of Cu-Gr-B₄C hybrid composites prepared by powder metallurgy route