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Sliding wear resistance of biomorphic SiC ceramics

Opened Access Sliding wear resistance of biomorphic SiC ceramics

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Autor: Vera García, María del Carmen
Ramírez Rico, Joaquín
Martínez Fernández, Julián
Mritjunjay, Singh
Departamento: Universidad de Sevilla. Departamento de Física de la Materia condensada
Fecha: 2015
Publicado en: International Journal of Refractory and Hard Materials, 49, 327-333.
Tipo de documento: Artículo
Resumen: Biomorphic SiC ceramics were fabricated from four different wood precursors and their Knoop hardness and sliding wear resistance when sliding against a Si3N4 ball in air were studied. Tribological experiments were performed using a pin on disk apparatus, under normal loads of 2 and 5 N, at a sliding speed of 100 mm/s. The effects of specimen porosity and microstructure on measured wear were evaluated. A commercial sintered silicon carbide ceramic was also tested for comparison. Small differences in friction coefficient comparable to monolithic SiC ceramics were obtained. Several concurrent wear mechanisms are taking place: microfracture, plastic deformation in the Si phase and oxidation of the Si and/or SiC phase. The presence of an oxide tribolayer was assessed using fluorescence microscopy. Wear rates were found to scale with SiC content and depend on residual porosity in the composite.
Cita: Vera García, M.d.C., Ramírez Rico, J., Martínez Fernández, J. y Mritjunjay, S. (2015). Sliding wear resistance of biomorphic SiC ceramics. International Journal of Refractory and Hard Materials, 49, 327-333.
Tamaño: 2.522Mb
Formato: PDF

URI: https://hdl.handle.net/11441/72284

DOI: 10.1016/j.ijrmhm.2014.07.004

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