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Medical composite magnesium alloy and preparation method thereof

A magnesium alloy and alloy technology, applied in the field of biomedical magnesium alloy materials, can solve the problems of failing to meet the strength and degradation requirements, hindering the self-recovery of human tissue, uncontrollable strength and degradation rate, etc., and achieve a wide range of mechanical properties and degradation rates. The effect of promoting bone tissue healing and reducing mechanical strength

Active Publication Date: 2022-07-29
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, magnesium alloys have poor corrosion resistance and low absolute mechanical strength. Some scholars have proposed modification methods such as microalloying, surface treatment, and deformation strengthening to improve the mechanical and degradation properties of magnesium alloys, and achieved good results.
Although these methods can achieve the purpose of simultaneously improving the mechanical properties and corrosion resistance of magnesium alloys, when they are used as implant materials, their strength and degradation rate are uncontrollable during the entire implantation process, and cannot meet different strength and degradation requirements in different periods. That is: in the early stage of implantation, sufficient mechanical strength and slow degradation rate are required to ensure the daily activities of the patient, while in the middle and late stages of implantation, due to the healing and regeneration of the human body's own bone tissue, the requirements for the strength of the implant are reduced , and its rapid degradation is required to prevent impeding the self-healing of human tissue

Method used

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  • Medical composite magnesium alloy and preparation method thereof
  • Medical composite magnesium alloy and preparation method thereof
  • Medical composite magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The magnesium alloy raw materials are mixed, smelted and cast to form to obtain a Mg-Y-Zn as-cast alloy ingot, and the mass percentage content of the ingot is Mg-9.1Y-1.8Zn. The ingot is subjected to homogenization annealing treatment. The annealing process is: 500 ℃ for 50 hours, and then air-cooled to room temperature to obtain an annealed alloy ingot; the annealed alloy ingot is machined to remove the surface oxide layer and preheated to 400 ℃, before extrusion. The extrusion deformation is carried out on the press. The preheating temperature of the extrusion cylinder is 300 ° C, the extrusion speed is 1.0 mm / s, and the extrusion ratio is 20. After the extrusion, the extrusion rod is air-cooled to room temperature to obtain an extruded alloy ingot. . The annealed alloy ingots were machined into rods with a diameter of 5 mm and a height of 12 mm. The as-extruded alloy ingot was machined into a sleeve with an inner diameter of 5 mm and an outer diameter of 10 mm and a...

Embodiment 2

[0044] The magnesium alloy raw materials are mixed, smelted and cast to form to obtain a Mg-Y-Zn as-cast alloy ingot, and the mass percentage content of the ingot is Mg-13.6Y-5.6Zn. The ingot is subjected to homogenization annealing treatment. The annealing process is: 520 ℃ for 100 hours, and then air-cooled to room temperature to obtain an annealed alloy ingot; the annealed alloy ingot is machined to remove the surface oxide layer and preheated to 450 ℃. The extrusion deformation is carried out on the press. The preheating temperature of the extrusion cylinder is 350 ° C, the extrusion speed is 2.0 mm / s, and the extrusion ratio is 25. After the extrusion, the extrusion rod is air-cooled to room temperature to obtain an extruded alloy ingot. . The annealed alloy ingots were machined into rods with a diameter of 5 mm and a height of 12 mm. The as-extruded alloy ingot was machined into a sleeve with an inner diameter of 5 mm and an outer diameter of 10 mm and a height of 10 mm...

Embodiment 3

[0045] Example 3 The magnesium alloy raw materials were mixed, smelted and cast to form to obtain a Mg-Y-Zn as-cast alloy ingot, and the mass percentage content of the ingot was Mg-6.6Y-0.9Zn. The ingot is subjected to homogenization annealing treatment. The annealing process is: 470 ℃ for 20 hours, and then air-cooled to room temperature to obtain an annealed alloy ingot; the annealed alloy ingot is machined to remove the surface oxide layer and preheated to 350 ℃. The extrusion deformation is carried out on the press, the preheating temperature of the extrusion cylinder is 250°C, the extrusion speed is 0.5mm / s, and the extrusion ratio is 15. After the extrusion, the extrusion rod is air-cooled to room temperature to obtain an extruded alloy ingot. . The annealed alloy ingots were machined into rods with a diameter of 5 mm and a height of 12 mm. The as-extruded alloy ingot was machined into a sleeve with an inner diameter of 5 mm and an outer diameter of 10 mm and a height o...

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Abstract

The invention discloses a medical composite magnesium alloy and a preparation method thereof, the composite magnesium alloy comprises a bar and a sleeve which are nested together, the bar is made of an annealed Mg-Y-Zn alloy, the sleeve is made of an extruded Mg-Y-Zn alloy, and the bar and the sleeve form the composite magnesium alloy through a hot press molding process. The composite magnesium alloy has great directivity and flexibility of microstructure and macrostructure design. The preparation method is simple in process, magnesium alloy materials of different size series can be prepared in batches, and the requirements for different strength and degradation rates of different implantation parts in a human body and different periods after implantation can be met.

Description

technical field [0001] The invention belongs to the field of biomedical magnesium alloy materials, in particular to a medical composite magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloys have the characteristics of light weight, high specific strength, good biocompatibility and degradability, and have been widely used in the field of biological bone repair in recent years. Magnesium is an essential trace element for the human body, and the daily intake of adults needs to reach 240-420 mg, and magnesium alloys have similar density and elastic modulus to human bones, so that they can effectively avoid the stress shielding effect during the implantation process. Thereby promoting the healing and growth of bone tissue. In addition, magnesium alloys have unique degradability, so that during the implantation process, with the gradual healing of bone tissue, magnesium alloys are naturally degraded and absorbed, thereby avoiding seconda...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C1/02C22F1/06
CPCC22C23/06C22C1/02C22F1/06
Inventor 卢先正邹贤俊周小杰张健陈小敏华熳煜陈子健张嘉诚
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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