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Ultrafine-grain medical magnesium alloy and preparation method thereof

A magnesium alloy and ultrafine-grained technology, which is applied in the field of binary or multi-elementary ultrafine-grained magnesium alloy implant materials and its preparation, can solve problems that cannot be directly used in production, and achieve room temperature specific tensile strength and elongation Improve, good biocompatibility, improve the effect of mechanical properties and corrosion resistance

Inactive Publication Date: 2012-01-11
LEPU MEDICAL TECH (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the rapid solidification method can only produce low-dimensional metal materials, such as powder, filament or sheet metal materials, which cannot be directly used in production and require further post-processing to produce profiles for direct use.

Method used

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  • Ultrafine-grain medical magnesium alloy and preparation method thereof
  • Ultrafine-grain medical magnesium alloy and preparation method thereof
  • Ultrafine-grain medical magnesium alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Raw material: Mg-Zn binary alloy, wherein, the content of Zn is 5%, and the rest is Mg; the purity of Mg in the raw material is ≥99.95%, and the purity of Zn is ≥99.99%.

[0030] Preparation:

[0031] 1. The preparation of ultrafine-grained magnesium alloy powder adopts such as figure 1 For the device shown, put 3g of raw materials into a quartz tube with a diameter of 0.5mm at the bottom of the size of d16mm×300mm, then place the quartz tube on top of a copper roller equipped with a vacuum cover, and evacuate to 1.0 ×10 -3 After Pa, reverse-fill high-purity argon to 1 atmosphere; after repeated vacuuming and argon filling for 3 to 5 times, use high-frequency induction melting equipment to heat to melt the magnesium alloy and overheat it at 100K, keep it for 2 minutes; then pour it into the quartz tube Blow in 2kPa high-pressure argon, and use the above-mentioned high-pressure argon to shoot the molten magnesium alloy on the surface of the copper roller with a rotatio...

Embodiment 2

[0035] Raw material: Mg-Zn binary alloy, wherein, the content of Zn is 5%, and the rest is Mg; the purity of Mg in the raw material is ≥99.95%, and the purity of Zn is ≥99.99%.

[0036] Preparation:

[0037] 1. The preparation of ultrafine-grained magnesium alloy powder adopts such as figure 2 In the device shown, the raw materials are put into a melting pot and heated to melt them, and the molten magnesium alloy is poured into a rotating concave disc made of red copper. The disc rotates at 25,000rpm / min. The liquid is sprayed along the tangential direction and forms droplets; the droplets are cooled by forced convection by jetting helium flow through the gas nozzles installed around the disk, and the cooling rate is about 10 7 K / s, so that the micro-droplets are rapidly solidified into a powder of 100-200 mesh (US sieve size, the same below).

[0038] The rest of the steps are the same as in Example 1, finally making Φ3mm ultrafine-grained magnesium alloy micropipes, the t...

Embodiment 3

[0040] Raw material: Mg-Ca binary alloy, wherein the content of Ca is 1%, and the rest is Mg; the purity of Mg in the raw material is ≥99.95%, and the purity of Ca is ≥99.95%.

[0041] Preparation:

[0042] 1. Preparation of ultra-fine-grained magnesium alloy powder Prepare molten magnesium alloy according to the method in Example 1 and overheat it at 100K. After 5 minutes of heat preservation, the molten magnesium alloy is shot at a speed of 3000rpm and a thermal conductivity of 386W / mK with 1kPa of argon. On the surface of the roll, the liquid magnesium alloy is rapidly cooled on the roll surface, and the cooling rate is about 10 7 K / s, the magnesium alloy is solidified into a thin strip and thrown out along the direction of rotation of the copper roller; the above-mentioned magnesium alloy thin strip is broken into a powder of 35 mesh (powder particle size 500 μm) through a series of high-speed crushing processes.

[0043] 2. Preparation of ultra-fine-grained magnesium all...

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Abstract

The invention provides an ultrafine-grain medical magnesium alloy which is one of Mg-Zn, Mg-Ca, Mg-Mn or Mg-rare earth binary alloys, or one of ternary alloys or complex alloys formed by the same. The medical magnesium alloy contains at least one of the following metal components in percentage by mass: 0.5-10% of Zn, 0.5-10% of Ca, 0.5-10% of Mn or 0.1-10% of rare earth and the balance of magnesium; the purities of the components in the medical magnesium alloy are all above 99.9%. The invention also provides a preparation method of the superfine-grain medical magnesium alloy. By using the preparation method provided by the invention, mechanical property and corrosion resistance of the magnesium alloy can be greatly improved by combining quick solidification with vacuum hot compression. Compared with a traditional cast magnesium alloy, the ultrafine-grain medical magnesium alloy provided by the invention has the advantages that the room temperature is increased by above 40% compared with the tensile strength, the elongation rate is increased by above 5%, the corrosion speed is reduced to 0.15-0.25 mm / year, the grain size is thinned to be less than 10 microns; and the ultrafine-grain medical magnesium alloy has excellent biocompatibility.

Description

technical field [0001] The invention relates to an ultrafine-grain medical magnesium alloy material, in particular to a bioabsorbable binary or multi-element ultrafine-grain magnesium alloy implant material and a preparation method thereof. Background technique [0002] Magnesium alloy materials have important medical value. Magnesium is an indispensable and important nutritional element for the human body, which can promote the formation of bones, is related to the activities of various enzymes in the human body, and participates in the metabolism of the human body. my country is rich in magnesium resources, and the advantages and potentials of magnesium alloy metal biomaterials will definitely attract more and more attention. The corrosion resistance and mechanical properties of magnesium alloys have always been a concern. The corrosion resistance and mechanical properties of magnesium alloys are not only related to the composition and structure of the material itself, bu...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22C23/06C22C23/00B22F9/10B22F3/04
Inventor 张艳龙张正才蒲忠杰赵昆杨映红李颖
Owner LEPU MEDICAL TECH (BEIJING) CO LTD
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