Oxidation Behavior of MAX Phase Ti2Al(1−x)SnxC Solid Solution

• DOI: 10.1111/jace.12358
• Publication Date: 2013-04-19T10:25:03Z
• Authors: Guoping Bei; Birgit‐Joana Pedi...; Tobias Fey; Peter Greil
• Keywords: 0103 physical sciences; 01 natural sciences

MAX phase Ti2Al(1−x)SnxC solid solution with x = 0, 0.32, 0.57, 0.82, and 1 was synthesized by pressureless sintering of uniaxially pressed Ti, Al, Sn, and TiC powder mixtures. Annealing in air atmosphere at 200°C–1000°C triggered a sequence of oxidation reactions which reveal a distinct influence of solid solution composition on the oxidation process. With decreasing Al/Sn ratio, the characteristic temperature of accelerated oxidation reaction of A‐element was reduced from 900°C (x = 0) to 460°C (x = 1). SnO2 was formed at temperatures significantly lower than TiO2 (rutile) and Al2O3. Substitution of A‐element in MAX phase solid solution by low‐melting elements such as Sn may offer potential for reducing oxidation‐induced crack healing temperatures.