Effects of Cr3C2 content and temperature on sliding friction and wear behaviors of Cr3C2/Ni3Al composite materials
| Autor: | W. Han, Zhi-ling Tian, Li Hua Fu, Karin Anne Xia Gong, Lin Zhao, Meng Zhou, Sven Bengtsson, Changhai Li |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Abrasive 02 engineering and technology Surfaces and Interfaces engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Surfaces Coatings and Films Wear resistance chemistry.chemical_compound 020303 mechanical engineering & transports 0203 mechanical engineering chemistry Mechanics of Materials Phase (matter) Materials Chemistry engineering Adhesive wear Cast iron Composite material 0210 nano-technology Volume loss human activities Chromium carbide |
| Zdroj: | Wear. :163-173 |
| ISSN: | 0043-1648 |
| DOI: | 10.1016/j.wear.2018.08.013 |
| Popis: | Chromium carbide (Cr3C2)-reinforced Ni3Al matrix composites, which possess excellent high-temperature strength and wear resistance, are considered as potential high-temperature wear-resistant materials. In this study, effects of Cr3C2content on the friction and wear properties of Cr3C2/Ni3Al composites and their counterpart gray cast iron disks were investigated at different temperatures. The worn surface morphologies of the Cr3C2/Ni3Al composites and gray cast iron disks were analyzed to understand their wear mechanisms. The analysis results showed that in the Ni3Al matrix composites, a combination of abrasive wear and adhesive wear occurred at room temperature, whereas adhesive wear was severer at 200 °C. Furthermore, the optimum Cr3C2contents of the Cr3C2/Ni3Al composites were found to be 18 vol% and 12 vol% at room temperature and 200 °C, respectively. The volume loss of the composites increased with an increase in the fraction of the Cr3C2strengthening phase at 350 °C. The wear resistance of the gray cast iron disks decreased with an increase in temperature. In contrast, the wear resistance of the Ni3Al matrix composites increased with an increase in temperature. This increased wear resistance of the composites is attributed to the transformation of their wear mechanism with increasing temperature. |
| Databáze: | OpenAIRE |
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