Dry sliding wear behavior of nano-sized SiC pins against SiC and Si3N4 discs |
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| Affiliation: | 1. CNR-ISTEC, Institute of Science and Technology for Ceramics, Via Granarolo 64, I-48018 Faenza, Italy;2. Department of Chemistry and Materials Technology, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8585 Kyoto, Japan;3. Research Institute for Nanoscience (RIN), Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8585 Kyoto, Japan;1. The University of Queensland, School of Mechanical and Mining Engineering, Brisbane, Qld 4072, Australia;2. Jilin University, School of Materials Science and Engineering, Changchun, China;1. Silesian University of Technology, Department of Materials Science and Metallurgy, Krasinskiego 8, 40-019, Katowice, Poland;2. Luxembourg Institute of Science and Technology, Material Research and Technology Department, 41 rue du Brill, L-4422, Belvaux, Luxembourg;1. Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi''an, Shaanxi, 710072, PR China;2. IMDEA Materials Institute, C/Eric Kandel, 2, 28906, Getafe, Madrid, Spain |
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| Abstract: | Micro- and nano-sized hot-pressed silicon carbide pins have been characterized by room-temperature unlubricated disk-on-pin tribological tests on hot-pressed silicon carbide and silicon nitride discs. The mean grain size was shown not to influence the steady state friction coefficient. The mean grain size clearly affected the disc wear rate: the finer was the grain size the lower was the disc wear rate. No impact of the grain size was observed on the pin wear rate. The basic wear mechanisms were grain fracture and fine abrasion. By depth-sensing indentation, it was shown that a possible explanation of the different wear behaviour between micro- and nano-sized silicon carbide are the values of mechanical properties, especially hardness, when they are measured on volumes scaling with the material microstructure. |
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