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A kind of mg-re series magnesium alloy and its preparation method and application

A magnesium alloy and alloy technology, applied in the field of medical metal materials and its preparation, can solve problems such as distortion, induced cancer, human allergy and inflammatory response

Active Publication Date: 2020-03-27
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, because of corrosion, wear and harmful ions leaching out of implant materials, it will cause human allergic and inflammatory reactions, and even lead to serious diseases such as distortion and induced cancer.
Therefore, medical metal materials need to be improved in the effectiveness, accuracy and timing of disease treatment

Method used

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  • A kind of mg-re series magnesium alloy and its preparation method and application
  • A kind of mg-re series magnesium alloy and its preparation method and application
  • A kind of mg-re series magnesium alloy and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1, preparation cast state Mg-RE series magnesium alloy

[0067] The test raw materials are pure Mg (99.9wt.%) and common industrial grade rare earth (TREM>99.5wt.%) as raw materials, according to the mass ratio in the following table:

[0068] Types of REs RE content Mg content Eu 1％ margin Eu 3％ margin Tb 1％ margin Tb 5％ margin Dy 1％ margin Dy 10％ margin Er 1％ margin Er 10％ margin T m 1％ margin T m 10％ margin Yb 1％ margin Yb 3％ margin Lu 1％ margin Lu 10％ margin

[0069] mixed, in CO 2 +SF 6 Under the protection of the atmosphere, heat up to 50-100°C higher than the melting point of the alloy, and keep the temperature for 20 minutes with stirring. The liquid metal is poured into a graphite mold preheated to 250°C, cooled to room temperature with the furnace, and then released from the furnace to obtain a Mg-RE magnesium alloy.

[...

Embodiment 2

[0071] Embodiment 2, preparation extruded state Mg-RE series magnesium alloy

[0072] First, the as-cast Mg-RE series magnesium alloy ingot is prepared according to the steps in Example 1 of the present invention, the Mg-RE series alloy bar is prepared by extrusion, radial extrusion is adopted, the ingot is kept warm for 4 hours, and the holding temperature 450°C or 500°C, water-cooled for later use. The extrusion temperature is 450° C. or 500° C., the extrusion speed is 1 mm / s, and the extrusion ratio is 11, and a Mg-RE alloy rod with a diameter of 12 mm is prepared.

[0073] figure 2 The photo of the microstructure of the above sample shows that extrusion significantly improves the microstructure of the material, the original coarse grains are significantly thinner, and the coarser second phase is also broken, and its distribution is more uniform. The metallographic phase of a single-phase alloy or an extruded alloy containing a small amount of second phase presents a uni...

Embodiment 3

[0074] Embodiment 3, the corrosion performance test of Mg-RE series magnesium alloy

[0075] The extruded Mg-RE magnesium alloy prepared in Example 2 was cut into a block sample of Φ12mm×2mm, polished with 800#, 1200#, 2000# sandpaper in sequence, and ultrasonically cleaned with ethanol. Then in Hank’s simulated body fluid (NaCl 8.0g, CaCl 2 0.14g, KCl 0.4g, NaHCO 3 0.35g, glucose 1.0g, MgCl 2 6H 2 O 0.1g,Na 2 HPO 4 2H 2 O 0.06g, KH 2 PO 4 0.06g, MgSO 4 7H 2 (0.06g was dissolved in 1L deionized water) for immersion experiment, the ratio of the volume of the solution to the surface area of ​​the sample was 20mL / cm 2 , record the pH change of the solution every day, such as image 3 shown.

[0076] Depend on image 3 It can be seen that in the early stage of immersion, the pH value increase rate of each combination of gold was significantly higher than that in the later stage. In general, the corrosion rate of Mg-1Eu is significantly lower than that of other M...

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Abstract

The invention aims at providing an Mg-RE-series magnesium alloy and a preparing method and application thereof. The magnesium alloy comprises Mg and RE, wherein RE is at least one of Tb, Dy, Er, Tm, Yb, Lu and Eu. By mass percent, the mass percent of the RE in the magnesium alloy is 0-15.0%. The Mg-RE-series magnesium alloy has excellent comprehensive mechanical performance, degradability and cytocompatibility and can be used for preparing degradable medical implanted bodies.

Description

technical field [0001] The invention belongs to the technical field of medical metal materials and their preparation, and in particular relates to a Mg-RE magnesium alloy and its preparation method and application. Background technique [0002] Traditional medical metal materials such as stainless steel, cobalt-chromium-molybdenum alloy, titanium alloy, etc. have good mechanical properties and corrosion resistance, and have important social value and economic benefits. However, if they are not taken out by secondary surgery, these foreign materials will remain in the body for a long time as foreign bodies, which may cause varying degrees of irritation to surrounding tissues, and may cause a series of serious consequences. For example, the elastic modulus of traditional metal internal fixation materials is much higher than that of human bone, and its long-term existence causes a "stress shielding" effect, which easily leads to a lack of sufficient stress stimulation in the bo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/02C22F1/06A61L27/04
CPCA61L27/047C22C1/02C22C23/06C22F1/06
Inventor 郑玉峰边东刘嘉宁成艳夏丹丹
Owner PEKING UNIV
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