Production of Zr₅₅Cu₃₀Ni₅Al₁₀ Glassy Alloy Rod of 30 mm in Diameter by a Cap-Cast Technique

Abstract

In order to produce bulk glassy alloys with diameters above 1 cm, various cast techniques have been developed. The maximum diameter of Zr₅₅Cu₃₀Ni₅Al₁₀ alloy achieved was 16 mm by the copper metallic mold cast technique and 20 mm by the tilt cast technique. In order to produce a much larger sized bulk glassy alloy, a cap-cast technique, leading to the achievement of a higher cooling rate even in an upper region, was developed through the modification of the tilt casting technique. This paper presents the production of a glassy Zr₅₅Cu₃₀Ni₅Al₁₀ alloy rod with a diameter of 30 mm.