Beryllium-free nickel-free high-ductility zirconium-base block body amorphous alloy and preparation method thereof

Abstract

The invention provides a beryllium-free nickel-free high-ductility zirconium-base block body amorphous alloy and a preparation method thereof. The alloy comprises, by atom, 38-50% of Zr, 2-15% of Hf, 20-30% of Cu, 5-10% of Fe, 10-15% of Al, 0-5% of Co, 0-5% of Ag and 0-5% of Nb. The electric arc melting copper mould casting method is adopted for preparation. The amorphous alloy is free of metal elements such as Be and Ni, and biocompatibility of the zirconium-base alloy is improved. The high amorphous forming capacity is achieved, and the zirconium-base block body amorphous alloy with the critical size being no less than 5 mm can be prepared through the copper mould casting method. According to the beryllium-free nickel-free high-ductility zirconium-base block body amorphous alloy, high hardness is achieved, and vickers hardness is larger than 540 Hv; the plastic deformation capacity being larger than 3% is achieved; and the super-cooled liquid phase region range is wide and reaches 92 K at most. The beryllium-free nickel-free high-ductility zirconium-base block body amorphous alloy and the preparation method thereof has very wide application prospects in the fields of biomedical materials such as a precise complex medical component, a joint prosthesis and a human skeleton.

Description

technical field [0001] The invention belongs to bulk amorphous alloys, in particular to a high-plasticity Zr-based bulk amorphous alloy without metal elements Be and Ni, the critical size of which is not less than 5mm, and the plastic deformation capacity is not less than 3%. [0002] technical background [0003] Amorphous alloys (metallic glasses) are promising metallic materials for new-generation structural and functional applications that have emerged in recent years. Different from the long-range ordered arrangement of atoms in traditional metal materials, the atoms of amorphous alloys are arranged randomly and do not have long-range order. There are no defects such as grain boundaries and dislocations in their microstructures. Therefore, Amorphous alloys exhibit excellent properties such as high strength, high hardness, high elastic limit, low modulus, and corrosion resistance that traditional crystalline alloys cannot achieve. In addition, amorphous alloys exhibit hi...

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Problems solved by technology

However, when the material contains Be and reaches the elastic limit, the material undergoes sudden catastrophic fracture.

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