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Degradable rare earth magnesium alloy medical biomaterial and preparation method thereof

A biomaterial and rare earth intermediate alloy technology, applied in the field of biodegradable rare earth magnesium alloy medical biomaterials and their preparation, can solve the problems of excessive corrosion rate, poor mechanical integrity, insufficient time for healing, etc., and achieve excellent mechanical properties, Good mechanical properties and processability, effect of complete degradation

Active Publication Date: 2014-10-29
DONGGUAN EONTEC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, common magnesium-based material systems such as pure magnesium, magnesium-aluminum-based, and magnesium-zinc-based systems have too fast corrosion rates, poor mechanical integrity, and insufficient time to heal, making them unsuitable for use as medical materials.

Method used

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  • Degradable rare earth magnesium alloy medical biomaterial and preparation method thereof
  • Degradable rare earth magnesium alloy medical biomaterial and preparation method thereof
  • Degradable rare earth magnesium alloy medical biomaterial and preparation method thereof

Examples

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preparation example Construction

[0024] The preparation method of the degradable rare earth magnesium alloy medical biological material of the present invention comprises the following steps:

[0025] (1) Alloy smelting: raw materials are batched according to the ratio, the surface is sandblasted and peeled and preheated to 200°C; the cast iron crucible is preheated to 300°C, and SF 6 :CO 2 Add magnesium ingots to the protective gas with a volume ratio of 1:200; when the metal in the crucible is completely melted and the melt temperature reaches 740°C, add metal zinc, magnesium-yttrium master alloy, and magnesium-gadolinium master alloy in sequence; when the melt temperature When it reaches 770°C, add magnesium-zirconium alloy, and after stirring, when the melt temperature drops to 730°C, continue to pass in argon gas for refining for 5 minutes, and stand at 730°C for 20 minutes; when the melt temperature drops to 720°C, put The alloy liquid is cast into a water-cooled mold to make a degradable rare earth ma...

Embodiment 1

[0030] Example 1: Mg-0.5Y-0.1Dy-0.8Zn-0.4Zr degradable rare earth magnesium alloy

[0031] The preparation method of Mg-0.5Y-0.1Dy-0.8Zn-0.4Zr degradable rare earth magnesium alloy is as follows:

[0032] 1. Preparation of magnesium-rare earth and magnesium-zirconium master alloys. According to the ratio of 80wt.% of magnesium metal and 20wt.% of rare earth gadolinium, the metal magnesium and rare earth gadolinium are put into a cast iron or graphite crucible, heated and melted, and the temperature is raised to 780°C, stirred evenly and then allowed to stand for 20 minutes , and then cast into a magnesium-gadolinium master alloy ingot. SF is introduced into the smelting process 6 :CO 2 Protective gas with a volume ratio of 1:200. According to the same process parameters and raw material ratios, magnesium-yttrium, magnesium-neodymium, and magnesium-dysprosium master alloys were prepared respectively. The magnesium-zirconium master alloy ingot is prepared by adopting the ...

Embodiment 2

[0040] Example 2: Mg-1.0Y-0.3Dy-1.0Zn-0.4Zr degradable rare earth magnesium alloy

[0041] The preparation method of Mg-1.0Y-0.3Dy-1.0Zn-0.4Zr degradable rare earth magnesium alloy is as follows:

[0042] 1. Preparation of magnesium-rare earth and magnesium-zirconium master alloys. According to the ratio of 80wt.% of magnesium metal and 20wt.% of rare earth gadolinium, metal magnesium and rare earth gadolinium are put into a cast iron or graphite crucible, heated and melted, and heated to 780°C, stirred evenly and left to stand for 20 minutes, and then cast into a magnesium-gadolinium master alloy ingot. SF is introduced into the smelting process 6 :CO 2 Protective gas with a volume ratio of 1:200. According to the same process parameters and raw material ratios, magnesium-yttrium, magnesium-neodymium, and magnesium-dysprosium master alloys were prepared respectively. The magnesium-zirconium master alloy ingot is prepared by adopting the above-mentioned process with a r...

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Abstract

The invention provides a degradable rare earth magnesium alloy medical biomaterial which is prepared by taking magnesium as a base alloy and adding a rare earth, zinc and zirconium according to a certain proportion relationship; the degradable rare earth magnesium alloy comprises the chemical composition by the mass percentage: 0.5-2.0 wt.% of Y, 0.1-0.5 wt.% of Dy, 0.8-1.2 wt.% of Zn, 0.35-0.55 wt.% of Zr, and the balance Mg and inevitable impurities. At the same time, the invention provides a preparation method of the degradable rare earth magnesium alloy medical biomaterial. The degradable rare earth magnesium alloy medical biomaterial has the following advantages: 1, the degradable rare earth magnesium alloy medical biomaterial has good mechanical properties and processing performance, and can meet the need of medical implant materials; 2, the degradable rare earth magnesium alloy medical biomaterial has good corrosion resistance, not only can be completely degraded, but also can ensure an appropriate corrosion speed; and 3, toxicity of alloying elements has strict limitation. The degradable rare earth magnesium alloy medical biomaterial is mainly used in medical metal materials.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy materials, in particular to a degradable rare earth magnesium alloy medical biological material and a preparation method thereof. Background technique [0002] In the current highly industrialized society, magnesium alloys have attracted people's attention due to their light weight, high specific strength, and abundant resource reserves. Their application scope has expanded from structural components and power systems to functional materials such as energy and biology. In terms of medical metal materials, magnesium alloys not only have mechanical properties close to natural bone, but also show outstanding biocompatibility in human implantation experiments. In neutral and chlorine-containing environments, magnesium implants corrode and decompose to form soluble non-toxic oxides, which can stimulate the growth of new bone tissue. However, common magnesium-based material systems such as pure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06
Inventor 孟健田政邱鑫范珺李扬德李卫荣刘芳菲庞栋孙丽娟
Owner DONGGUAN EONTEC CO LTD
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