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- Title
Tribological Behavior of Ti<sub>2</sub>SC at Ambient and Elevated Temperatures.
- Authors
Gupta, S.; Amini, S.; Filimonov, D.; Palanisamy, T.; El-Raghy, T.; Barsoum, M. W.
- Abstract
The tribological properties of Ti2SC were investigated at ambient temperatures and 550°C against Ni-based superalloys Inconel 718 (Inc718) and alumina (Al2O3) counterparts. The tests were performed using a tab-on-disk method at 1 m/s and 3N (≈0.08 MPa). At room temperature, against the superalloy, the coefficient of friction, μ, was ∼0.6, and at ∼8 × 10−4 mm3·(N·m)−1 the specific wear rate (SWRs), was high. However, against Al2O3, at ∼5 × 10−5 mm3·(N·m)−1 and ∼0.3, the SWRs and μ were significantly lower, which was presumably related to more intensive tribo-oxidation at the contact points. At 550°C, the Ti2SC/Inc718 and Al2O3 tribocouples demonstrated comparable μ's of ∼0.35–0.5 and SWRs of ∼7–8 × 10−5 mm3·(N·m)−1. At 550°C, all tribosurfaces were covered by X-ray amorphous oxide tribofilms. At present, Ti2SC is the only member of a family of the layered ternary carbides and nitrides (MAX phases) that can be used as a tribo-partner against Al2O3 in the wide temperature range from ambient to 550°C.
- Subjects
SURFACE chemistry; METALLIC composites; METALLIC oxides; METALLURGY; HEAT resistant alloys; ALUMINUM oxide; OXIDATION; NITRIDES; CARBIDES
- Publication
Journal of the American Ceramic Society, 2007, Vol 90, Issue 11, p3566
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2007.01950.x