Friction and wear properties of MoAlB against Al2O3 and 100Cr6 steel counterparts |
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| Authors: | Abdessabour Benamor Sankalp Kota Nabil Chiker Adel Haddad Youcef Hadji Varun Natu Said Abdi Mostepha Yahi Mohamed E.A. Benamar Tahar Sahraoui Mohamed Hadji Michel. W. Barsoum |
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| Affiliation: | 1. Laboratoire des Aeronefs, University of Blida 1, Blida, Algeria;2. Department of Materials Science & Engineering, Drexel University, Philadelphia, United States;3. Laboratoire des Sciences et Genie des Materiaux, University of Babezouar, Algiers, Algeria;4. Center of Research Technology Industrial, CRTI, Algiers, Algeria;5. Laboratoire Physique Fund. et Appliqué, University of Blida 1, Blida, Algeria |
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| Abstract: | The present work investigates, for the first time, the dry sliding friction and wear behaviour of fully dense, predominantly single-phase MoAlB ceramics against alumina (Al2O3) and 100Cr6 steel counterparts. Against Al2O3, the friction coefficient (μ) increased with increasing load and the wear was highly dependent on the load applied. A transition from mild wear under 1 N and 4 N to severe wear at 10 N occurred. Scanning electron microscopy revealed that abrasion is the dominant wear mechanism. Against steel, μ decreased with increasing load and the wear rates were low, under all applied loads. The morphologies of the worn surfaces against steel were characterized by the appearance of a rippled layers. Atomic force microscopy and Raman spectroscopy were used to propose a possible formation mechanism of such patterns. X-ray photoelectron spectroscopy revealed the rippled surfaces to be composed of Fe2O3 and a mixture of MoOx. |
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| Keywords: | Corresponding author. MoAlB Wear Friction Microstructure Ripples |
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