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Single-phase multi-element rare earth magnesium alloy biodegradable material and preparation method thereof

A biodegradable material, rare earth magnesium technology, applied in the field of biomedical alloy materials, can solve the problems of compound and alloy element toxicity, etc., achieve good biological safety, improve performance, improve corrosion resistance and uniformity of corrosion effects

Active Publication Date: 2016-07-27
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese invention patent application with the application number CN201180010623.1 provides an implant made of biodegradable magnesium alloy, which uses Ho, Er, Lu and Tm as the main components, and Y, Nd and Gd as microalloys Magnesium alloys designed with rare earth elements mainly use the precipitation strengthening formed by rare earth alloys, but the compounds and alloy elements formed by multi-element alloy design have potential toxicity

Method used

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  • Single-phase multi-element rare earth magnesium alloy biodegradable material and preparation method thereof
  • Single-phase multi-element rare earth magnesium alloy biodegradable material and preparation method thereof
  • Single-phase multi-element rare earth magnesium alloy biodegradable material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0034]Raw materials are configured according to the following alloy composition ratio: Gd5%, Dy3%, Y1%, Zn1.0%, Zr0.4%, the rest is Mg, the total amount of impurity elements is ≤0.005%, and Fe in impurity elements is ≤0.0005%, Ni≤0.0005%, Cu≤0.001%, the raw materials are 99.99% Mg, 99.99% Zn, Mg25Gd, Mg25Dy, Mg25Y, Mg30Zr, and the raw materials are cleaned with weak acid and alkali and dried for later use. The preparation of the alloy is smelted with a low-carbon steel crucible that does not contain Ni and is coated with BN coating on the inner wall of the crucible. When the crucible is heated to 650 ° C, pure Mg is added for melting, and Ar+0.2% SF is used. 6 Melting under protection; when the pure Mg is completely melted and the temperature rises to 680°C, use a graphite bell jar to press other raw materials into the Mg melt, then heat up to 730°C, use rotary jetting for stirring and purification treatment, and rotary jetting of gas It is high-purity Ar gas, the gas flow rat...

Embodiment 2

[0040] Raw materials are configured according to the following alloy composition ratio: Gd2%, Dy6%, Y1%, Zn0.5%, Zr0.6%, the rest is Mg, the total amount of impurity elements is ≤0.005%, and Fe in impurity elements is ≤0.0005%, Ni≤0.0005%, Cu≤0.001%, the raw materials are 99.99%Mg, 99.99%Zn, Mg25Gd, Mg25Dy, Mg25Y, Mg30Zr, and the raw materials are cleaned with weak acid and alkali and dried for later use; The low-carbon steel crucible coated with BN paint on the inner wall is smelted. When the crucible is heated to 650°C, pure Mg is added for melting, and Ar+0.2%SF is used. 6 Melting under protection; when the pure Mg is completely melted and the temperature rises to 700°C, use a graphite bell jar to press alloy elements into the Mg melt, then heat up to 780°C, use rotary jetting for stirring and purification treatment, and rotary jetting of gas It is high-purity Ar gas, the gas flow rate is 30mL / min, the time is 15min, and the alloy solution is prepared after the temperature ...

Embodiment 3

[0046] The raw materials are configured according to the following alloy composition ratio: Gd2%, Dy3%, Y2%, Zn1.0%, Zr0.6%, the rest is Mg, the total amount of impurity elements is ≤0.005%, and Fe in impurity elements is ≤0.0005%, Ni≤0.0005%, Cu≤0.001%, the raw materials are 99.99% Mg, 99.99% Zn, Mg25Gd, Mg25Dy, Mg25Y, Mg30Zr, and the raw materials are cleaned with weak acid and alkali, and dried for later use. The preparation of the alloy is smelted with a low-carbon steel crucible that does not contain Ni and is coated with BN coating on the inner wall of the crucible. When the crucible is heated to 650 ° C, pure Mg is added for melting, and Ar+0.2% SF is used. 6 Melting under protection; when the pure Mg is completely melted and the temperature rises to 690°C, use a graphite bell jar to press the alloy elements into the Mg melt, then heat up to 750°C, use rotary jetting for stirring and purification, and rotary jetting of gas It is high-purity Ar gas, the gas flow rate is ...

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Abstract

The invention relates to a single-phase multi-element rare earth magnesium alloy biodegradable material and a preparation method thereof. The material is prepared from, by weight percent, 0.1%-23.49% of Gd, 0.1%-25.3% of Dy, 0.1%-8.75% of Y, 0.1%-6.2% of Zn, 0.01%-0.6% of Zr and the balance Mg. The provided magnesium alloy biological material is a single-phase solid solution material, the content of a single impurity element influencing the alloy corrosion performance and the total content of the impurity elements are strictly controlled, the influences of precipitated phases and the impurity elements on the alloy corrosion performance are eliminated, and the corrosion resistance, the corrosion evenness and the mechanical property of the material are improved. By means of zone freezing, multi-stage solution treatment and extrusion cooling treatment, a multi-element alloy with a single phase is prepared, all the alloy elements in the alloy exist in the form of an elementary substance and the form of a solid solution state, metal ions can be completely formed in the degradation process to be absorbed by the human body or discharged out of the human body, the problem of difficult degradation of a metal compound is solved, and subsequent recovery and health of patients are facilitated.

Description

technical field [0001] The present invention relates to the technical field of biomedical alloy materials, especially biodegradable magnesium alloy bioimplantation materials, and specifically refers to a single-phase multi-element rare earth magnesium alloy biodegradable material, and the invention also relates to the biodegradable material of the single-phase multi-element rare earth magnesium alloy biodegradable material Preparation. Background technique [0002] At present, biodegradable and absorbable materials are becoming a research hotspot in biomaterials, especially the new generation of medical metal materials represented by biodegradable magnesium alloys has received special attention. As biomedical materials, Mg and Mg alloys have many properties superior to existing biomedical metal materials. A large number of studies have shown that, regardless of mechanical properties or biocompatibility, magnesium alloys are excellent bioimplantation materials. However, the ...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22C23/06C22C23/00C22C30/06C22C30/00C22C1/02C22F1/06C22F1/16
CPCC22C1/02C22C23/00C22C23/04C22C23/06C22C30/00C22C30/06C22F1/06C22F1/16
Inventor 任政张潇庞松郑超任静王荣王旭东杨忠平朱秀荣
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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