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Mg alloy for being implanted in bone and preparation method of Mg alloy

A magnesium alloy and bone technology, applied in the field of alloys, can solve problems such as insecurity, achieve the effects of ensuring biocompatibility, excellent mechanical properties and corrosion resistance, and reducing costs

Inactive Publication Date: 2018-08-03
温州市赢创新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, magnesium alloys containing aluminum are not safe for the human body

Method used

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  • Mg alloy for being implanted in bone and preparation method of Mg alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A magnesium alloy for bone implantation, characterized in that: by weight percentage, the chemical composition is Zn 1.5%, Mn 0.6%, Ca 0.3%, Si 0.3%, Sr 0.45%, Li 1%, Cr 2.5% , Cu 1%, Mo 1.3%, Sc+La+Ce: 0.01%, Nb: 0.1%, the balance is Mg and unavoidable impurity elements, wherein the mass ratio of Sc, La, and Ce is 6:3:1.

[0036] The preparation method of the magnesium alloy for bone implantation,

[0037] (1) Ingredients: According to the composition design required by the magnesium alloy, the ingredients are first carried out, and the Mg-Zn master alloy is selected. The Mg:Zn mass ratio in the Mg-Zn master alloy is 0.8-0.82:1; the Mg-Sr master alloy is selected. The mass ratio of Mg:Sr is 0.42-0.44:1; Mg-Si master alloy is selected, wherein the mass ratio of Mg:Si is 48-49:1, and other low-melting point elements are in the form of pure metal with a purity of 99.99% and / or low melting point Added in the form of master alloy;

[0038](2) Alloy smelting: Preheat the a...

Embodiment 2

[0043] A magnesium alloy for bone implantation, characterized in that: by weight percentage, the chemical composition is: Zn2.5%, Mn1.1%, Ca 0.55%, Si 0.4%, Sr 0.6%, Li 1.6%, Cr 3%, Cu 1.25%, Mo 1.35%, Sc+La+Ce: 0.05%, Nb 0.65%, and the balance is Mg and unavoidable impurity elements. The mass ratio of Sc, La, and Ce is 6:3:1. The preparation method of the magnesium alloy for bone implantation,

[0044] (1) Ingredients: According to the composition design required by the magnesium alloy, the ingredients are first carried out, and the Mg-Zn master alloy is selected. The Mg:Zn mass ratio in the Mg-Zn master alloy is 0.8-0.82:1; the Mg-Sr master alloy is selected. The mass ratio of Mg:Sr is 0.42-0.44:1; Mg-Si master alloy is selected, wherein the mass ratio of Mg:Si is 48-49:1, and other low-melting point elements are in the form of pure metal with a purity of 99.99% and / or low melting point Added in the form of master alloy;

[0045] (2) Alloy smelting: Preheat the alloy ingo...

Embodiment 3

[0050] A magnesium alloy for bone implantation, characterized in that: by weight percentage, the chemical composition is: Zn 3%, Mn 1.1%, Ca 0.8%, Si 0.45%, Sr 0.8%, Li 1.8%, Cr 3.5% %, Cu 2%, Mo 1.4%, Sc+La+Ce: 0.08%, Nb: 0.8%, and the balance is Mg and unavoidable impurity elements. The mass ratio of Sc, La, and Ce is 6:3:1. The preparation method of the magnesium alloy for bone implantation,

[0051] (1) Ingredients: According to the composition design required by the magnesium alloy, the ingredients are first carried out, and the Mg-Zn master alloy is selected. The Mg:Zn mass ratio in the Mg-Zn master alloy is 0.8-0.82:1; the Mg-Sr master alloy is selected. The mass ratio of Mg:Sr is 0.42-0.44:1; Mg-Si master alloy is selected, wherein the mass ratio of Mg:Si is 48-49:1, and other low-melting point elements are in the form of pure metal with a purity of 99.99% and / or low melting point Added in the form of master alloy;

[0052] (2) Alloy smelting: Preheat the alloy ingo...

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Abstract

The invention provides a Mg alloy for being implanted in bone. The Mg alloy is characterized by comprising the following chemical components in percentage by weight: 1.5-3% of Zn, 0.6-1.1% of Mn, 0.3-0.8% of Ca, 0.3-0.45% of Si, 0.45-0.8% of Sr, 1-1.8% of Li, 2.5-3.5% of Cr, 1-2% of Cu, 1.3-1.4% of Mo, 0.01-0.08% of Sc, La and Ce, 0.1-0.8% of Nb, and the balance of Mg and inevitable impurity elements. According to the Mg alloy provided by the invention, the yield strength is higher than or equal to 370 MPa, the tensile strength is higher than or equal to 410 MPa, the elongation is higher thanor equal to 8.5%, and the sterilizing rate is higher than or equal to 90%. The above indices of the Mg alloy are obviously higher than those of other products which lack alloy elements and those of similar products which are not subjected to surface coating treatment.

Description

technical field [0001] The invention belongs to the field of alloys, and in particular provides a magnesium alloy used for bone implantation. Background technique [0002] In medical bone repair and bone implant materials, stainless steel and titanium-titanium alloys have become widely used materials because of their excellent mechanical properties, biocompatibility and corrosion resistance. However, the mechanical properties of stainless steel and titanium alloys do not match bone tissue, especially the elastic modulus, for example: the elastic modulus of stainless steel is about 200GPa, the elastic modulus of titanium alloy is about 100GPa, and the elastic modulus of bone tissue is about 10-40GPa. Thus, the implant takes almost the entire load. This creates a “stress shield” during use, causing atrophy or loosening of the bone surrounding the implant. At the same time, stainless steel and titanium alloy bone nails, bone plates and other implants require follow-up operat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06C23C22/34A61L27/04A61L27/30A61L27/32A61L27/58A61L31/02A61L31/08A61L31/14
CPCA61L27/047A61L27/306A61L27/32A61L27/58A61L31/022A61L31/086A61L31/088A61L31/148A61L2420/08A61L2430/02C22C1/03C22C23/00C22F1/06C23C22/34
Inventor 周建武
Owner 温州市赢创新材料技术有限公司
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