Anisotropic swelling and microcracking of neutron irradiated Ti3AlC2–Ti5Al2C3 materials. (15th March 2016)

• Record Type: Journal Article
• Authors: Ang, Caen; Silva, Chinthaka; Shih, Chunghao; Koyanagi, Takaaki; Katoh, Yutai; Zinkle, Steven J.
• Is Part Of: Scripta materialia. Volume 114(2016)
• Page Start: 74
• Page End: 78
• Publication Date: 2016-03-15
• Subjects: Anisotropic swelling -- Neutron irradiation -- MAX phase -- Microcracking -- Lattice parameter; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.11.008
• Languages: English
• ISSNs: 1359-6462

Abstract

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: