Zr-based biomedical alloy and preparation method thereof

Abstract

The invention discloses a Zr-based biomedical alloy and a preparation method thereof. The Zr-based biomedical alloy comprises, by weight, 10.5-19% of niobium, 0%-30% of titanium and the balance zirconium and inevitable impurity elements. The preparation method comprises the following steps that (1) the raw materials are weighed according to the proportion and then are fed into a reaction containerof a vacuum smelting furnace for mixing, and vacuum smelting is carried out on the mixture repeatedly under the shielding of inert gas to obtain molten reaction liquid; and (2) cold water is continuously injected to the bottom of the reaction container to make the molten reaction liquid be cooled rapidly until the temperature is reduced to room temperature, and then the Zr-based biological medical alloy is obtained. According to the Zr-based biomedical alloy, the advantages of low modulus, low magnetic susceptibility, excellent mechanical property and the like are realized, so that the problem of stress shielding possibly caused by metal of an implant is solved, reduction of the magnetic susceptibility of metal-based biological implant materials is facilitated, and the influence on MRI (nuclear magnetic resonance imaging) artifacts is reduced.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite materials, and in particular relates to a Zr-based biomedical alloy and a preparation method thereof. Background technique [0002] Biomedical materials are functional materials used for clinical diagnosis, treatment, repair or replacement of human tissues or organs or enhancement of their functions. Biomedical materials are related to human organs and medical devices. At present, many scholars around the world are conducting in-depth research on them. Biomedical materials have become an indispensable part of the field of material research. General requirements for biomedical materials: (1) must comply with the relevant standards, and should be non-toxic, non-pyrogenic, non-teratogenic, non-carcinogenic, non-allergic, non-interfering with the immune mechanism of the body, and have good blood Compatibility and tissue compatibility, etc. (2) Good biological stability. For biomedical...

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Problems solved by technology

Although β-Ti alloy has a lower elastic modulus, most of them are still higher than the modulus range of human bones (10-30GPa), which is easy to cause stress shielding effect and is not conducive to bone healing

In addition, with the continuous development of medical detection technology, especially the rapid development of nuclear magnetic resonance technology, higher performance requirements are put forward for implant materials. Although Ti is a paramagnetic material with relatively low magnetic properties, there are still many reports It is mentioned that titanium alloy implants can affect the quality of MRI images and form artifact areas

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