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Medical degradable Fe-Mg binary alloy material and preparation method thereof

A binary alloy and alloying technology, applied in the field of iron-magnesium alloys, can solve the problems of slow degradation rate, achieve the effect of increasing corrosion degradation rate, avoiding hazards, and accelerating corrosion degradation rate

Active Publication Date: 2013-04-10
SHANGHAI INNOVATON MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a medical degradable Fe-Mg binary alloy material and its preparation method. Due to the slow degradation rate in the human body, a medical degradable Fe-Mg binary alloy material was prepared by using the modern powder metallurgy method-spark plasma sintering method. The binary alloy material has high mechanical strength and is suitable for degradation. Speed ​​and good biocompatibility have good prospects and application value in the field of degradable implant materials such as bone implants and vascular stents

Method used

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Embodiment 1

[0029] This embodiment relates to a medical degradable Fe-Mg binary alloy material, which includes the following components in weight percentage: Mg is 0.1%, and the rest is iron.

[0030] This embodiment also relates to the preparation method of the aforementioned medical degradable Fe-Mg binary alloy material, the preparation method comprising the following steps:

[0031] The Fe-Mg alloy composition was prepared by SPS process powder sintering. The purity of iron powder in raw materials is ≥99.99%, and the purity of magnesium powder is ≥99.99%. Mix iron powder and magnesium powder at a weight ratio of 1000:1, put them into a planetary ball mill for ball milling at a speed of 450 rpm, and the ball milling process is to stop for 12 minutes every 48 minutes of ball milling, and continue ball milling for 24 hours. The alloy powder collected after ball milling was pre-pressed at 10 MPa and put into a spark plasma sintering furnace, and sintered at 650° C. for 10 minutes under t...

Embodiment 2

[0034] This embodiment relates to a medical degradable Fe-Mg binary alloy material, the binary alloy material includes the following components in weight percentage: Mg is 2%, and the rest is iron.

[0035] This embodiment also relates to the preparation method of the aforementioned medical degradable Fe-Mg binary alloy material, the preparation method comprising the following steps:

[0036] The Fe-Mg binary alloy material was prepared by SPS process powder sintering. The purity of the iron powder in the original binary alloy material is ≥99.99%, and the purity of the magnesium powder is ≥99.99%. Iron powder and magnesium powder were mixed at a weight ratio of 50:1, and put into a planetary ball mill for ball milling at a speed of 450 rpm. The ball milling process was to stop for 12 minutes every 48 minutes of ball milling, and continue ball milling for 24 hours. The alloy powder collected after ball milling was pre-pressed at 10 MPa and put into a spark plasma sintering fur...

Embodiment 3

[0039] This embodiment relates to a medical degradable Fe-Mg binary alloy material, which includes the following components in weight percentage: Mg is 5%, and the rest is iron.

[0040] This embodiment also relates to the preparation method of the aforementioned medical degradable Fe-Mg binary alloy material, the preparation method comprising the following steps:

[0041]The Fe-Mg binary alloy material was prepared by SPS process powder sintering. The purity of the iron powder in the original binary alloy material is ≥99.99%, and the purity of the magnesium powder is ≥99.99%. Iron powder and magnesium powder were mixed at a weight ratio of 20:1, and put into a planetary ball mill for ball milling at a speed of 450 rpm. The ball milling process was to stop for 12 minutes every 48 minutes of ball milling, and continue ball milling for 24 hours. The alloy powder collected after ball milling was pre-pressed at 10 MPa and put into a spark plasma sintering furnace, and sintered at...

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Abstract

The invention discloses a medical degradable Fe-Mg binary alloy material and a preparation method thereof. The binary alloy material comprises the following components by weight percentage: 0.1-10% of Mg, and the balance of Fe. The invention further relates to the preparation method of the binary alloy material. The method comprises the following steps that a conventional powder metallurgy method is adopted; ferrous powder and magnesium powder are subjected to ball milling, uniform mixing, and preliminary alloying; a discharge plasma sintering method is adopted for rapid sinter forming; and then an end product is obtained. As the alloy element Mg having a larger electrode potential difference from the matrix Fe is added, a driving force of electrochemical corrosion of an Fe-Mg alloy matrix is increased significantly, and the corrosion degradation rate of the Fe-Mg alloy matrix in an organism environment is increased greatly. The medical degradable Fe-Mg binary alloy material has good biocompatibility, higher mechanical property and appropriate corrosion rate, has an important application potential in the field of medical degradable implantation alloy materials, and has a wide application prospect.

Description

technical field [0001] The invention relates to an iron-magnesium alloy in the field of biomedical materials that can be completely degraded in vivo, specifically, a medical degradable Fe-Mg binary alloy material and a preparation method thereof. Background technique [0002] Biodegradable absorbent materials in vivo are an important direction for the development of biomaterials. Currently, biodegradable absorbent materials in clinical applications are mainly polymers and certain ceramic materials, such as polylactic acid and calcium phosphate. However, due to the low strength of polymer materials and poor plasticity and toughness of ceramic materials, their wide application is limited. In recent years, the research on a new generation of medical metal materials with biodegradable properties, mainly represented by iron-based and magnesium-based alloys, has received special attention. This new type of medical metal material has changed the traditional idea that people usuall...

Claims

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Application Information

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IPC IPC(8): A61L31/02C22C38/00C22C33/02
Inventor 袁广银牛佳林
Owner SHANGHAI INNOVATON MEDICAL TECH CO LTD
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