Preparation method of high-corrosion-resistance biodegradable magnesium alloy

A magnesium alloy, high corrosion resistance technology, applied in the field of materials, can solve problems such as poor mechanical properties, achieve good mechanical properties, avoid infection, and reduce the effect of corrosion rate
CN104328318AActive Publication Date: 2015-02-04NORTHEASTERN UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NORTHEASTERN UNIV
Publication Date
2015-02-04

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Abstract

The invention discloses a preparation method of a high-corrosion-resistance biodegradable magnesium alloy and belongs to the technical field of materials. The preparation method comprises the following steps: (1) preparing metallic magnesium, metallic zinc, metallic silver and metallic calcium as raw materials; (2) heating metallic magnesium to 760+ / -5 DEG C under the protection of N2 and SF6 mixed gas, melting, then sequentially adding metallic silver, metallic calcium and metallic zinc, stirring and uniformly mixing; (3) cooling to 740+ / -5 DEG C, introducing argon, and preserving heat and standing at 740+ / -5 DEG C for 10-20 minutes; (4) cooling to 720+ / -5 DEG C and casting; (5) heating to 300-320 DEG C and preserving the heat for 2-4 hours under the coverage of graphite powder, increasing the temperature to 350-450 DEG C, preserving heat for 8-12 hours, and cooling by water; (6) preserving the heat at 250-350 DEG C for 25-35 minutes, and then carrying out high-temperature plastic deformation; and (7) deforming at normal temperature and intermediately annealing for a plurality of times, and finally cooling by air to normal temperature. According to the method, by virtue of the single-phase fine-grain treatment, the magnesium alloy has high corrosion resistance and good mechanical property; the magnesium alloy can be used for manufacturing different implantable devices.
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Description

technical field

[0001] The invention belongs to the technical field of materials, in particular to a preparation method of a biodegradable magnesium alloy with high corrosion resistance. Background technique

[0002] Due to their good biocompatibility and degradability, magnesium and magnesium alloys have attracted widespread attention as implantable devices such as degradable bone repair materials, bone nails and plates, sutures, and cardiovascular stents.

[0003] At present, magnesium alloys that have been commercially used are used as implant materials to carry out biomedical research, such as AZ series and Mg-RE series; because the above-mentioned alloys usually use the strengthening effect of the second phase to improve their mechanical properties , At the same time, its corrosion resistance is greatly reduced, and the corrosion is very uneven, which limits its application as an implant material; in recent years, magnesium alloys for biological applications have also b...

Claims

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