Niobium-copper alloy material and preparation method thereof

Abstract

The invention relates to a niobium-copper alloy material and a preparation method thereof.The niobium-copper alloy material comprises, by mass, 97-99.5% of niobium and 0.5-3% of copper, and the niobium-copper alloy material is prepared through the following preparation method that (1) mixing raw materials according to a formula and subjecting the raw materials to high-energy ball milling to obtain an intermediate material; and (2) conducting spark plasma sintering on the obtained intermediate material, and conducting cooling to obtain the niobium-copper alloy material, wherein the spark plasma sintering comprises first heating, first heat preservation, second heating, second heat preservation, third heating, third heat preservation and cooling which are sequentially carried out under constant pressure. Niobium is adopted as a main component and copper is adopted as an auxiliary component to form a nanocrystalline niobium-copper dual-phase alloy, so that the niobium-copper alloy has the advantages of excellent biocompatibility, strong antibacterial property, good osteogenesis promoting effect, corrosion resistance, metallic luster and the like, and shows good corrosion resistance in a physiological environment. The niobium-copper alloy material can be used as a medical material for orthopedics department.

Description

technical field [0001] The invention relates to the field of alloy preparation, in particular to a niobium-copper alloy material and a preparation method thereof, in particular to a niobium-copper alloy material used for antibacterial orthopedic screws and a preparation method thereof. Background technique [0002] At present, metal-based biomaterials have been widely used in orthopedics, dentistry and other clinical medical fields, and are very important for the reconstruction and repair of human hard tissues and improving the quality of life of patients. Among them, fixation devices made of metal materials are widely used in traditional fracture treatment. At present, the medical biometal fixation devices in clinical use mainly include stainless steel, cobalt-based alloys, titanium and their alloys, and metals such as magnesium and tantalum and their alloys. [0003] For example, CN111388762A discloses a nano-doped skeletal alloy material, which includes an alloy base mat...

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Problems solved by technology

The first is that the metal implant material corrodes or wears in the physiological environment, which in turn causes metal ions to dissolve, causing allergies and other symptoms; secondly, the "stress shielding" mentioned above, it is difficult for metal materials to have a Young's modulus that matches human bone , so that the load cannot be transmitted from the metal material to the adjacent bone tissue, which is not conducive to bone healing, and may cause secondary fractures in severe cases; at the same time, due to the complicated operation, the metal screws cannot be degraded in the body and need to be removed by secondary surgery. The various complications caused by bacterial infections remain one of the challenges in medicine

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