Strong and Tough Bulk Metallic Glass Composites Based on the Double-Network Concept

A double-network concept is first adopted to toughen bulk metallic glasses (BMGs) by combining BMG cellular skeletons as the filler and a ductile alloy as the matrix. The strengthening and toughening mechanisms of these resulting composites are elucidated using FEM simulations. Three typical metallic glass composites with different cellular BMG skeletons, exhibiting a substantial increase in their tensile plasticity, are considered. Numerical results showed that these composites greatly exceeded the corresponding cellular skeletons in the tensile strength and toughness. The resulting composites far exceeded those of either of their parent materials in the most of their mechanical characteristics.