High-Temperature Tribological Performance of Ti3SiC2/TiAl Self-Lubricating Composite Against Si3N4 in Air
Source abstract
Abstract
More durable, low-friction bearing materials are needed for turbine components and other high-temperature bearing applications. The current study presents the sliding friction and wear behavior of a Ti3SiC2/TiAl composite (TTC) against a Si3N4 counterface at temperatures ranging from 25 to 800 °C in air. The load was 10N, and the sliding speed was 0.2 m/s for all tests. The friction coefficient of both the TiAl and the TTC composite increased with rising temperature up to 400 °C, but beyond that, the friction coefficient of the TTC decreased, making it more lubricative than TiAl at the higher temperatures. It is proposed that at high-temperatures, Ti3SiC2-formed oxides that were incorporated into a well-consolidated tribo-film drastically reducing the friction coefficients and wear rates of the TTC material.
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Research context
OpenAlex topics: MXene and MAX Phase Materials · Intermetallics and Advanced Alloy Properties · Advanced ceramic materials synthesis
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