Defect recovery processes in Cr-B binary and Cr-Al-B MAB phases: structure-dependent radiation tolerance. (15th August 2022)

• Record Type: Journal Article
• Authors: Kim, Jun Young; Zhang, Hongliang; Su, Ranran; Xi, Jianqi; Wei, Shuguang; Richardson, Peter; Liu, Longfei; Kisi, Erich; Perepezko, John H.; Szlufarska, Izabela
• Is Part Of: Acta materialia. Volume 235(2022)
• Publication Date: 2022-08-15
• Subjects: Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2022.118099
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: We have investigated the radiation tolerance of Cr-B binaries and Cr-Al-B ternary MAB phases using a combination of ab initio calculations and experiments. One key discovery is that Cr3 AlB4 has excellent resistance to radiation-induced amorphization, and therefore it is a promising material for applications in extreme environments. We also demonstrate that both the type of B network and the presence of Al layer in the structure have important implications for defect kinetics. We find that the order of the tolerance to radiation-induced amorphization is, from high to low, CrB, Cr3 AlB4, Cr3 B4, Cr4 AlB6, and Cr2 AlB2 at 150 °C and 0.5 dpa, and Cr3 AlB4, CrB, Cr3 B4, Cr4 AlB6, and Cr2 AlB2 at 300 °C and 1.0 dpa. The results are explained in terms of defect properties determined from ab initio calculations. Graphical abstract: Image, graphical abstract .