Tribological Behavior of Ti2SC at Ambient and Elevated Temperatures
Journal of the American Ceramic Society, 2007•Wiley Online Library
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 …
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 …
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.
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