Tribological properties of Ti3SiC2 coupled with different counterfaces
| Autor: | Libo Wang, Qing Feng Zan, Jin Jia, Yuanyuan Zhu, Aiguo Zhou, Bin Wu, Yiqiu Ji |
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| Rok vydání: | 2015 |
| Předmět: |
Friction coefficient
Materials science Scanning electron microscope Process Chemistry and Technology Metallurgy Oxide Tribology Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Mechanical wear Materials Chemistry Ceramics and Composites Composite material |
| Zdroj: | Ceramics International. 41:6950-6955 |
| ISSN: | 0272-8842 |
| Popis: | This paper reports the dry-sliding tribological properties of Ti 3 SiC 2 at room temperature in air, coupled with different counterfaces, including Ti 3 SiC 2 , Al 2 O 3 , Si 3 N 4 , SiC, and GCr15-bearing-steel. Ti 3 SiC 2 exhibited obviously different tribological properties with different sliding counterfaces. The lowest friction coefficient (0.43) and wear rate (2.09×10 −4 mm 3 /Nm) were obtained in the Ti 3 SiC 2 /SiC friction pair. Increased friction coefficient (0.63) and wear rate (3.67×10 −4 mm 3 /Nm) were observed if Ti 3 SiC 2 slides against GCr15-bearing-steel. The highest friction coefficient (1.30) was observed in Ti 3 SiC 2 /Al 2 O 3 friction pair and the highest wear rate (1.87×10 −3 mm 3 /Nm) was observed in Ti 3 SiC 2 /Ti 3 SiC 2 friction pair. Scanning electron microscopy and X-ray photoelectron spectroscopy showed two main wear mechanisms: mechanical wear and oxidation wear. Mechanical wear was the main mechanism for sliding against Ti 3 SiC 2 , Si 3 N 4 , or Al 2 O 3 . Grain removal was a significant tribological character of self-mated Ti 3 SiC 2 friction pair. For Ti 3 SiC 2 /SiC friction pair, oxide wear played a more important role and more oxides were formed than those in other friction pairs. Oxide films protected the surface of Ti 3 SiC 2 /SiC friction pair from direct contact, and decreased wear rate and friction coefficient. |
| Databáze: | OpenAIRE |
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