A kind of degradable rare earth magnesium alloy medical biological material and preparation method

A biomaterial, rare earth magnesium technology, applied in the field of magnesium alloy materials, can solve problems such as excessive corrosion rate, poor mechanical integrity, and insufficient time for healing, and achieve excellent mechanical properties, good mechanical properties and processing properties, and complete degradation Effect

Active Publication Date: 2016-06-01
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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  • A kind of degradable rare earth magnesium alloy medical biological material and preparation method
  • A kind of degradable rare earth magnesium alloy medical biological material and preparation method
  • A kind of degradable rare earth magnesium alloy medical biological material and preparation method

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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-dysprosium master alloy in sequence; when the melt temperature When it reaches 770°C, add magnesium-zirconium master alloy, 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 , casting the alloy liquid 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 yttrium and magnesium-zirconium master alloys. According to the ratio of 80wt% by mass of magnesium metal and 20wt% by mass of rare earth yttrium, the metal magnesium and rare earth yttrium 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, then Cast into magnesium-yttrium 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 ratio, magnesium-yttrium, magnesium-zirconium and magnesium-dysprosium master alloys were prepared respectively. A magnesium-zirconium master alloy ingot is prepared by adopting the above-mentioned process in...

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 yttrium and magnesium-zirconium master alloys. According to the ratio of 80% by mass of magnesium metal and 20% by mass of rare earth yttrium, metal magnesium and rare earth yttrium 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. It is then cast into a magnesium-yttrium 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 ratio, magnesium-yttrium, magnesium-zirconium and magnesium-dysprosium master alloys were prepared respectively. The magnesium-zirconium master alloy ingot is prepared by adopting the above-mentioned process ...

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Abstract

The invention provides a biodegradable rare-earth magnesium alloy medical biomaterial, which is made of magnesium as the base alloy and added with rare earth, zinc and zirconium elements according to a certain ratio. The chemical composition of the degradable rare-earth magnesium alloy is: Y0 .5-2.0wt.%, Dy0.1-0.5wt.%, Zn0.8-1.2wt.%, Zr? 0.35-0.55wt.%, the rest is Mg and unavoidable impurity elements. At the same time, a preparation method of the biodegradable rare earth magnesium alloy medical biomaterial is provided, including the following steps: (1) alloy smelting, (2) alloy extrusion, and (3) alloy heat treatment. The invention has the following advantages: 1. It has good mechanical properties and processing properties, which can meet the needs of medical implant materials; 2. It has good corrosion resistance, which can not only achieve complete degradation, but also ensure an appropriate corrosion rate; 3. , The toxicity of alloying elements is strictly limited. The invention 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 Patents(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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