Anisotropic swelling and microcracking of neutron irradiated Ti3AlC2–Ti5Al2C3 materials. (15th March 2016) - Ang, Caen
Abstract: Mn + 1 AXn (MAX) phase materials based on Ti–Al–C have been irradiated at 400 °C (673 K) with fission neutrons to a fluence of 2 × 10 25 n/m 2 (E > 0.1 MeV), corresponding to ~ 2 displacements per atom (dpa). We report preliminary results of microcracking in the Al-containing MAX phase, which contained the phases Ti3 AlC2 and Ti5 Al2 C3 . Equibiaxial ring-on-ring tests of irradiated coupons showed that samples retained 10% of pre-irradiated strength. Volumetric swelling of up to 4% was observed. Phase analysis and microscopy suggest that anisotropic lattice parameter swelling caused microcracking. Variants of titanium aluminum carbide may be unsuitable materials for irradiation at light water reactor-relevant temperatures. Graphical abstract: