Abstract: Metallic glasses have attracted considerable attention due to their unique properties. The recent discovery of new glass-forming compositions makes it possible to produce metallic glasses in bulk shapes. Bulk metallic glasses offer an opportunity to revolutionize the field of structural materials with combinations of strength, elastic limit, toughness, wear resistance and corrosion resistance. The main current technical barrier is their limited ductility. Forming a composite containing ductile crystal phase in a bulk metallic glass matrix has been proven as an effective approach to increase their ductility. Three types of bulk metallic glass composites are discussed: extrinsic composites, in-situ composites and nanocrystalline composites. The paper also lists the key issues in the development of bulk metallic glass composites.

Key words: Metallic glasses, Bulk metallic glasses, Composites, Microstructure, Mechanical properties