Abstract Scope |
MAX phases are a family of 80+ ternary carbides and nitrides, and even larger number of their solid solutions, that share common unique naonolayered structure and chemical formula Mn+1AXn, where n = 1, 2 or 3, M is and early transition metal, A is an A-group element and X is either C or N. The main reason for growing interest in MAX phases lies in their unusual, and sometimes unique combination of mechanical and thermal properties that makes them a good candidates for structural applications at high temperatures. Most importantly for their applications at high temperature, some of them – most notably Ti2AlC and Cr2AlC – shows exceptional oxidation resistance due to formation of the protective, self-healing and adherent alumina protective oxide scale. In this presentation, our current understanding of what makes some of the MAX phases exceptionally oxidation resistant will be reviewed and discussed in more details. |