Fabrication of bulk glassy Hf50Cu30Ni10Al10 alloy by copper mold casting

Abstract

The glass-forming ability of the Hf50Cu30Ni10Al10 alloy was examined by melt-spinning and copper mold casting methods. A new Hf50Cu30Ni10Al10 bulk glassy rod of 3 mm in diameter was formed by copper mold casting. The crystallization temperature (Tx), glass transition temperature (Tg) and Tg/T1 of the glassy alloy rod were 780 K, 860 K and 0.61, respectively. The Hf50Cu30Ni10Al10 bulk glassy alloy exhibits density of 11.0 × 103 kg/m3, Vickers hardness of 590, Young's modulus of 118 GPa and compressive fracture strength of 2420 MPa. The synthesis of the Hf-based bulk glassy alloy with high Tg/Tl, high fracture strength and high density is encouraging for future application of bunk glassy alloys.