Abstract Scope |
Interfaces and atomic layering in 3D materials (e.g., in MAX phases) have been frequently shown to lead to significant improvements in radiation resistance. Here, I will introduce a new class of 3D layered borides (MAB phases), which we have shown to have outstanding resistance to radiation-induced amorphization. Specifically, I will explain the role of the metal (A) layer in radiation response of MAB phases, and I will introduce rules for design of MAB phases with efficient defect recovery processes. I will demonstrate that in materials with covalent bonding, interfaces are not always beneficial to radiation resistance, and I will use engineered multi-layered materials based on MAX phases as an example. Finally, I will show that interfaces in covalent materials can undergo radiation-induced segregation (RIS), even if the material has a strong desire to be stoichiometric, and that RIS has a significant impact on corrosion resistance of these materials. |