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Medical degradable Fe-Mg-Ag alloy material, preparation and application

A technology of alloy materials and biomedical materials, which is applied in the field of medical degradable Fe-Mn-Ag ternary iron-based alloy materials and its preparation and application, can solve the problems of low degradation rate of Fe-30Mn alloy, achieve excellent mechanical properties, Effect of increased compressive yield strength and low magnetic susceptibility

Active Publication Date: 2018-10-19
SOUTHWEST UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that the degradation rate of Fe-30Mn alloy is still too low at present, the present invention further develops a biodegradable iron-based alloy with high strength, fast degradation rate and harmless to human body by adding Ag, an element with relatively positive corrosion potential. Proposed design of Fe-Mn-Ag ternary degradable iron-based alloy

Method used

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  • Medical degradable Fe-Mg-Ag alloy material, preparation and application
  • Medical degradable Fe-Mg-Ag alloy material, preparation and application
  • Medical degradable Fe-Mg-Ag alloy material, preparation and application

Examples

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Effect test

Embodiment 1

[0025] Fe-Mn-Ag ternary iron-based alloy, the chemical composition of the components is: Mn: 30%, Ag: 5%, and the rest is iron; the purity of Mn and Ag is ≥99.9%, and the purity of Fe is ≥99.5%.

[0026] Weigh iron raw material, manganese raw material and silver raw material according to composition alloy ratio;

[0027] Heat and melt iron raw materials, manganese raw materials and silver raw materials, and repeatedly smelt them to form alloy melts;

[0028] The alloy melt is rapidly cooled and formed in a mold using a vacuum electric arc furnace.

[0029] Process the ferroalloy after suction casting into a compression sample with a length of 6mm and a diameter of 3mm, and test the mechanical properties of the material on the RGM-4100 mechanical testing machine according to the GB / T 7314-2005 standard, such as figure 1 As shown, Fe-Mn-5Ag has better mechanical properties than Fe-30Mn, and its yield strength is 148MPa, and its plastic deformation is about 22%.

[0030] Such ...

Embodiment 2

[0036] Fe-Mn-Ag ternary iron-based alloy, the chemical composition of the components is: Mn: 30%, Ag: 2%, and the rest is iron; the purity of Mn and Ag is ≥99.9%, and the purity of Fe is ≥99.5%.

[0037] Weigh iron raw material, manganese raw material and silver raw material according to composition alloy ratio;

[0038] Heat and melt iron raw materials, manganese raw materials and silver raw materials, and repeatedly smelt them to form alloy melts;

[0039] The alloy melt is rapidly cooled and formed in a mold using a vacuum electric arc furnace.

[0040]The ferroalloy after suction casting is processed into a compression sample with a length of 6mm and a diameter of 3mm, and the mechanical properties of the material are tested on the RGM-4100 mechanical testing machine according to the GB / T 7314-2005 standard, and the yield strength is 126MPa, and the plastic deformation is 27%. The corrosion rate obtained by electrochemical test in simulated body fluid SBF solution is 0....

Embodiment 3

[0042] Fe-Mn-Ag ternary iron-based alloy, the chemical composition of the components is: Mn: 30%, Ag: 10%, and the rest is iron; the purity of Mn and Ag is ≥99.9%, and the purity of Fe is ≥99.5%.

[0043] Weigh iron raw material, manganese raw material and silver raw material according to composition alloy ratio;

[0044] Heat and melt iron raw materials, manganese raw materials and silver raw materials, and repeatedly smelt them to form alloy melts;

[0045] The alloy melt is rapidly cooled and formed in a mold using a vacuum electric arc furnace.

[0046] Process the ferroalloy after suction casting into a compression sample with a length of 6 mm and a diameter of 3 mm. According to the GB / T 7314-2005 standard, the mechanical properties of the material are tested on the RGM-4100 mechanical testing machine, and the yield strength is 194 MPa, and the plastic deformation is 26%. The corrosion rate obtained by electrochemical test in simulated body fluid SBF solution is 0.128...

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Abstract

The invention relates to a medical degradable Fe-Mg-Ag alloy material and a preparation method thereof. The Fe-Mg-Ag alloy material comprises the following chemical components by weight percentage: 30% of Mn, 1-10% of Ag, and the balance iron. The invention utilizes the characteristic that Fe30Mn alloy can be corroded in the human environment so as to be biodegradable, the positive potential antibacterial element Ag is added into the alloy for smelting in a vacuum arc furnace, and rapid cooling is carried out to obtain the novel degradable iron-based alloy. The alloy has greatly increased degradation rate, is conducive to shortening the degradation time after implantation into the human body and reducing the stimulation of the implant to organisms, and later through release of Ag+, the implant has certain antibacterial properties, thus improving the therapeutic effect of medical devices. The material provided by the invention has good mechanical properties and biocompatibility, and hasmore excellent nuclear magnetic resonance compatibility.

Description

technical field [0001] The invention belongs to the technical field of biomedical metal materials, and specifically relates to a medical degradable Fe-Mn-Ag ternary iron-based alloy material and its preparation and application. Background technique [0002] In recent years, there have been continuous explorations at home and abroad to use biodegradable metal materials as temporary implant materials in vascular intervention and osteosynthesis. Traditional alloy biomaterials represented by stainless steel, titanium-based alloys, and cobalt-based alloys have excellent corrosion resistance in the human body. However, long-term implantation of these metal objects will cause some complications. In fact, in some cases, Permanent bioinert materials are no longer required. While biodegradable metals are a new generation of biomedical materials, these metal implants are expected to corrode and gradually degrade with proper repair function in the body until finally disappearing to ach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C33/04A61L31/14A61L31/02A61L31/16
CPCA61L31/022A61L31/14A61L31/148A61L31/16A61L2300/104A61L2300/404C22C33/04C22C38/007C22C38/04
Inventor 郭胜锋何然干刘若愚
Owner SOUTHWEST UNIVERSITY
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