Nano-laminate Ti 3 AlC 2 is a layered ternary carbide consisting of periodic planar stacking of edge-sharing Ti 6 C octahedra and close-packed Al atoms along the c -axis. Ti 3 AlC 2 has a unique combination of interesting properties that make it a promising candidate material in diverse applications. In this paper, the stability of nano-laminate Ti 3 AlC 2 upon heating in argon with low oxygen content has been investigated. It was indicated that nano-laminate Ti 3 AlC 2 was stable below at least 1460 °C. On the other hand, selective oxidation of Al in Ti 3 AlC 2 took place on top of the specimen, which resulted in the transformation of Ti 3 AlC 2 into substoichiometric TiC x and Al 2 O 3 . Aligned submicropores were observed on the oxidized particles. Those pores were regarded as the rapid channels through which alumium atoms could easily migrate outward from the substrate to form protective Al 2 O 3 scales on bulk Ti 3 AlC 2 at high temperatures. Because of the synergic and whole migration of Al atoms, there was no Al-depletion area beneath the protective scales.
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Wang et al. (2003) studied this question.
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