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An absorbable biomedical high-strength and corrosion-resistant magnesium alloy material and its preparation method

A biomedical, magnesium alloy technology, applied in the field of magnesium alloy biomaterials, can solve problems such as lumen stenosis, achieve the effects of refinement and uniform distribution, speed up transmission and diffusion, and reduce performance requirements

Inactive Publication Date: 2018-10-02
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the implantation of stents in infants and young children, due to the permanent presence of implanted metal substances, the diameter of blood vessels there is inhibited from increasing with age, and it is easy to induce restenosis of the lumen

Method used

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  • An absorbable biomedical high-strength and corrosion-resistant magnesium alloy material and its preparation method

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Embodiment 1

[0035]In the present embodiment, the raw material composition is as follows: Zn 1.00%, Y 1.00%, Zr 0.3%, all the other are Mg and contain a small amount of impurity elements Fe, Ni, Al, Cu, impurity elements are calculated by mass percentage, and each content does not exceed 0.1%, and the total amount shall not exceed 0.4%.

[0036] The preparation method of magnesium alloy in the present embodiment is as follows:

[0037] First, use ZnO and talcum powder paint to evenly brush the inner wall of the self-made non-magnetic stainless steel crucible to white, and preheat the slag removal spoon, stirring spoon, and mold to 200°C; then when the furnace temperature rises to 400°C, put 500g magnesium block Put it into the crucible and continue to heat up to 710°C, keep it warm for 15 minutes to melt the magnesium block; remove the slag when the temperature drops to 700°C, and add 5.2g of Zn block; Add granular pure Y and 5.2gMg-30wt.%Zr master alloy at the same time, stir slightly be...

Embodiment 2

[0042] In this embodiment, the raw material composition is as follows: Zn 5.00%, Y 1.00%, Zr 0.7%, the rest is Mg and contains a small amount of impurity elements Fe, Ni, Al, Cu, impurity elements are calculated by mass percentage, and each content does not exceed 0.1%, and the total amount shall not exceed 0.4%.

[0043] The preparation method of magnesium alloy in the present embodiment is as follows:

[0044] First, use ZnO and talcum powder paint to evenly brush the inner wall of the self-made non-magnetic stainless steel crucible to white, and preheat the slag removal spoon, stirring spoon, and mold to 205°C; then when the furnace temperature rises to 420°C, put 500g magnesium block Put it into the crucible and continue to heat up to 720°C, keep it warm for 20 minutes to melt the magnesium block; remove the slag when the temperature drops to 705°C, and add 27.3g of Zn block; Add granular pure Y and 12.5gMg-30wt.%Zr master alloy at the same time, stir slightly below the l...

Embodiment 3

[0049] In the present embodiment, the raw material composition is as follows: Zn 1.00%, Y 2.00%, Zr 0.4%, the rest is Mg and contains a small amount of impurity elements Fe, Ni, Al, Cu, impurity elements are calculated by mass percentage, each content is different Exceeding 0.1%, the total amount shall not exceed 0.4%.

[0050] The preparation method of magnesium alloy in the present embodiment is as follows:

[0051] First, paint the inner wall of the self-made non-magnetic stainless steel crucible evenly with ZnO and talcum powder to white, and preheat the slag removal spoon, stirring spoon, and mold to 210°C; then when the furnace temperature rises to 430°C, put 500g magnesium block Put it into a crucible and continue to heat up to 715°C, keep it warm for 18 minutes to melt the magnesium block; remove slag when the temperature drops to 710°C, and add 5.2g of Zn block; Add granular pure Y and 6.8gMg-30wt.%Zr master alloy at the same time, stir slightly below the liquid leve...

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Abstract

The invention discloses an absorbable biomedical high-toughness anti-corrosion magnesium alloy material and a preparation method thereof and belongs to the field of biological materials. The absorbable biomedical high-toughness anti-corrosion magnesium alloy material is a magnesium alloy composed of, in percentage by mass, 1.00-5.00% of Zn, 1-2% of Y, 0.3-0.7% of Zr and the balance Mg. Whole-course gas protection resistance furnace smelting and a rotating magnetic field and ultrasonic externalfield composite treatment technology are adopted to manufacture an ingot casting, then through homogenization treatment and hot extrusion deformation, extremely uniform and tiny second phases of Mg3Y2Zn3, Mg3YZn6 and Mg24Y5 are dispersed and distributed on a magnesium base body, and thus the biomedical magnesium alloy which has extremely high toughness and is resistant to corrosion and capable of being completely degraded is obtained. The absorbable biomedical high-toughness anti-corrosion magnesium alloy material can be used for cardiovascular intervention therapy, endosseous implantation and other medical fields.

Description

technical field [0001] The invention relates to an absorbable biomedical high-strength, toughness, and corrosion-resistant magnesium alloy material and a preparation method thereof, belonging to the field of magnesium alloy biomaterials. Background technique [0002] In vivo biodegradable absorbent materials are a hotspot in the research of biomaterials. Biodegradable absorbing materials for clinical application are mainly polymers and certain ceramic materials, such as polylactic acid, calcium phosphate, etc., but the strength of polymer materials is low, and the plasticity and toughness of ceramic materials are poor. The advantages of metal materials such as stainless steel, titanium alloy and cobalt-chromium alloy for medical implants lie in their good mechanical properties and corrosion resistance, which can maintain the overall structural stability in the body for a long time. However, these metal materials cannot be degraded in the body after implantation, and remain ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04C22C1/02C22F1/06
CPCC22C1/02C22C23/04C22F1/002C22F1/06
Inventor 刘燕萍许春香张金山卜颖宏阎佩雯杨文甫韩少兵
Owner TAIYUAN UNIV OF TECH
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