Journal article
Friction and wear characteristics of the nanolaminated ternary transition metal boride: Mn2AlB2
WEAR, v 492-493, 204232
15 Mar 2022
Abstract
Herein, the wear and friction behavior, under unlubricated sliding in ambient air, of the MAB phase Mn2AlB2 is reported. Various sliding pairs (WC, Al2O3, Si3N4, and chromium-bearing steel 100Cr6) were used in a ball-on-disc apparatus at a normal load of 10 N and a sliding velocity of 20 cm/s. Raman spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy were used to identify the wear mechanisms and tribooxidation products involved during the dry sliding contacts. Against WC, Al2O3, and Si3N4, the Mn2AlB2 exhibited wear by tribo-oxidation accompanied with delamination and abrasion, which led to high wear rates on the order of similar to 10(-3) mm(3)/N . m and coefficients of friction of 0.72-0.87. However, Mn2AlB2/100Cr6 tribopair showed relatively mild wear behavior. The evolution of COF and wear rate for this tribopair, under different loads (5, 10, 15 N) and speeds (5, 25, 50 cm/s), showed the existence of load and speed thresholds (15 N at 25 cm/s and 10 N at 50 cm/s), beyond which an abrupt transition from mild to severe wear of Mn2AlB2 takes place. Below the thresholds, the Mn(2)AlB(2 )surfaces remain undamaged with the formation of a protective transfer layer, composed of a mixture of iron and manganese oxides. Above the thresholds, both friction and wear increase, and the Mn2AlB2 wears by microfracture and grain pullout.
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Details
- Title
- Friction and wear characteristics of the nanolaminated ternary transition metal boride: Mn2AlB2
- Publication Details
- WEAR, v 492-493, 204232
- Publisher
- ELSEVIER SCIENCE SA; LAUSANNE
- Grant note
- This research was funded by la Direction Generale de la Recherche Scientifique et du Developpement Technologique (DGRSDT). Part of this research was funded by the Programme National Exceptionel (PNE) 2019/2020. The authors would like to thank gratefully Pr. M. W. Barsoum from the Department of Materials Science and Engineering, Drexel University, Philadelphia, USA, for providing Mn2AlB2 samples.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Drexel University
- Web of Science ID
- WOS:000754300000003
- Scopus ID
- 2-s2.0-85122228038
- Other Identifier
- 991021861311004721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Engineering, Mechanical
- Materials Science, Multidisciplinary