Magnesium alloy slurry and printing method thereof

Abstract

The invention discloses magnesium alloy slurry and a printing method thereof. The magnesium alloy slurry comprises, by weight percentage, 5-50 wt% of magnesium alloy particles, 10-40% of polylactic acid particles and the balance auxiliaries; the auxiliaries comprise a solvent, a consistency adjusting agent, an activating agent and a thixotropic agent; the magnesium alloy particles comprise an AZ31magnesium alloy, and the particle size is 25-38 microns; and the polylactic acid particles are polymer with the molecular weight being 10000-20000, the particle size being 0-10 microns and the decomposing temperature being 200-220 DEG C. According to the method, the prepared magnesium alloy slurry is injected into a material storing groove, pressurizing is performed, the slurry is made to uniformly enter an injecting valve body through a material conveying groove, the slurry is made to be fast sprayed out due to impacting of piezoelectric ceramics, and micro drops are formed. By adopting thetechnical scheme, due to printing and control on the magnesium alloy slurry, a new method is provided for 3D printing of magnesium alloy-polylactic acid composite materials.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to magnesium alloy jet printing paste and its printing. Background technique [0002] In recent years, magnesium and its alloys have gradually become a research hotspot in the field of biodegradable biomaterials. Compared with existing bone tissue engineering materials, magnesium and its alloys have the following advantages: (1) have good biocompatibility with the human body; (2) can be completely degraded into magnesium ions in the body, and can pass through the human body after being absorbed by surrounding body tissues. Discharge of body fluids, avoid secondary surgery, and reduce the burden on patients; (3) have suitable physical and mechanical properties, and the elastic modulus is close to that of bone tissue; (4) The degradation products have no cytotoxicity, magnesium has no inhibitory effect on the growth of bone marrow cells, and has no Cell lysis was found; (5) M...

AI Technical Summary

Problems solved by technology

Among the currently reported technical solutions, such as direct coating of polylactic acid PLA organic coatings on the surface of magnesium alloys, and the use of electrodeposition methods to prepare magnesium hydroxide coatings on the surface of magnesium alloys, can improve the performance of magnesium alloys to a certain extent. Corrosion resistance, but there are many common problems, such as too high porosity, insufficient compact structure, hydrolyzate reacts with magnesium alloy matrix to produce hydrogen, etc.

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