Tantalum based bulk metallic glasses

Ta-based bulk metallic glasses with high strength (2.7 GPa) and hardness (9.7 GPa), high elastic modulus (170 GPa) and high density (12.98 g/mm3) were developed. The best glass forming ability so far for a Ta–Ni–Co system reaches a critical diameter of 2 mm by the copper mold casting method. It shows an exceptionally high glass transition temperature of 983 K and a high crystallization temperature up to 1023 K. The unique mechanical and physical properties make them a promising high strength material.

Research Highlights
► The formation of the new Ta-based bulk metallic glasses with high strength and hardness, high elastic modulus and high density.
► The best glass forming ability so far for a Ta–Ni–Co system reaches a critical diameter of 2 mm by the copper mold casting method.
► The metallic glasses have a high glass transition temperature of 983 K and a high crystallization temperature up to 1023 K.