Friction and wear properties of MoAlB against Al2O3 and 100Cr6 steel counterparts
| Autor: | Varun Natu, Youcef Hadji, T. Sahraoui, Abdessabour Benamor, Said Abdi, Sankalp Kota, Nabil Chiker, Adel Haddad, Michel W. Barsoum, Mohamed Hadji, M. Yahi, Mohamed E.A. Benamar |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Friction coefficient Materials science Scanning electron microscope Atomic force microscopy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Abrasion (geology) symbols.namesake X-ray photoelectron spectroscopy visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites symbols visual_art.visual_art_medium Ceramic Composite material 0210 nano-technology Raman spectroscopy |
| Zdroj: | Journal of the European Ceramic Society. 39:868-877 |
| ISSN: | 0955-2219 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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