Preparation method of multihole zinc magnesium alloy/hydroxyapatite composite material

Abstract

The invention relates to a preparation method of a multihole zinc magnesium alloy / hydroxyapatite composite material. In view of the shortcomings of low mechanical property of multihole elemental zincand low biological activity in an in-vivo degradation process, hydroxyapatite, magnesium and zinc are used as raw materials, and a sodium chloride crystal is used as a pore forming agent, so that a multihole zinc magnesium alloy / hydroxyapatite composite material block body is prepared through powder blending, ball grinding powder mixing, discharge plasma sintering and removal of the pore forming agent. The preparation method is advanced in process, and data are precise, full and accurate; and the prepared multihole zinc magnesium alloy / hydroxyapatite composite material block body has a densitybeing 2.94 g / cm<3>, the porosity being 53 percent, an aperture being less than or equal to 450 micrometers, the yield strength being 60 MPa and the elastic modulus being 4 GPa, so that the multiholezinc magnesium alloy / hydroxyapatite composite material accords with human skeleton performance parameters and can meet a use requirement of a clinically medical orthopedic implant, and the preparing method is an advanced preparation method for the multihole ZnMg / HA composite material.

Description

technical field [0001] The invention relates to a method for preparing a porous zinc-magnesium alloy / hydroxyapatite composite material, and belongs to the technical field of preparation and application of zinc-based porous biological materials. Background technique [0002] As an essential element in the human body, zinc is involved in the synthesis of more than 80 biological enzymes in the body, and zinc can induce new bone growth and inhibit the osteophagic effect of osteophagic cells. Magnesium is also one of the essential elements for the human body, and it has the advantages of low density and degradability. Zinc-magnesium binary alloys are prepared with zinc as the matrix and added with magnesium elements, which have excellent mechanical properties during in vivo service, which makes zinc-magnesium alloys the most potential biodegradable biomaterials. However, the zinc-magnesium alloy with a solid structure has a high elastic modulus, and its mechanical compatibility ...

AI Technical Summary

Problems solved by technology

[0005] At present, the methods for preparing porous biocomposites include vacuum infiltration casting method, powder metallurgy method, and laser drilling method, but these methods have the problems of complex process, poor stability, and difficult control of pore structure.

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