Enhanced oxidation resistance in Ti3AlC2 via selective self-healing
Journal of the European Ceramic Society(2024)
Abstract
Ti3AlC2 is anticipated to be used in high temperature fields owing to its excellent dual characteristics of metal and ceramic. However, a critical challenge arises from the inevitable formation of pores within bulk Ti3AlC2 during the sintering process, which are detrimental to its oxidation resistance performance. Herein, the high temperature self-healing and selective oxidation characteristics of Ti3AlC2 are combined, and the selective self-healing of Ti3AlC2 is realized by controlling the pre-oxidation atmosphere, i.e., the pores are effectively filled with α-Al2O3. As a result, the oxidation resistance of Ti3AlC2 was significantly enhanced by 860 times. This method provides a simple and economical way to improve the high-temperature oxidation resistance of Al-containing MAX phase materials represented by Ti3AlC2.
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Key words
selective oxidation,self-healing,MAX phase,oxidation resistance
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