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A kind of biodegradable mg-ca-mn-sn magnesium alloy material and its preparation method and application

A mg-ca-mn-sn, magnesium alloy technology, applied in the field of medical implant materials, can solve problems such as the degradation rate can not meet the performance requirements, limit the wide application of magnesium alloys, poor corrosion resistance of magnesium alloys, etc., to improve creep resistance. The effect of changing properties, improving mechanical properties and corrosion resistance, and promoting healing

Active Publication Date: 2018-06-19
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the traditional medical metal materials commonly used clinically mainly include medical stainless steel, medical titanium alloy, medical cobalt alloy, etc., but these materials often have certain hidden dangers when used as medical implants, such as: corrosion in the environment of human body fluids will produce Release of toxic elements; the modulus of elasticity of traditional medical metal materials is higher than that of human bone; secondary surgery is required to remove it
[0003] Magnesium alloys as medical metal materials can be traced back more than 100 years ago. However, due to the poor corrosion resistance of magnesium alloys, the degradation rate in the human body is too fast to meet the performance requirements of medical implants, thus limiting the use of magnesium alloys as medical implants. Wide application of implants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The biodegradable Mg-Ca-Mn-Sn magnesium alloy material in this example is prepared from the following components according to the mass percentage: Ca 0.5%, Mn 1%, Sn 2%, the rest is Mg and the Unavoidable impurity elements. Concrete preparation steps are as follows:

[0023] (1) Using high-purity magnesium ingots, high-purity calcium particles, Mg-10%Mn intermediate alloys and high-purity tin particles as raw materials, the alloy raw materials are configured according to the above mass percentages, and graphite crucibles are used for melting and high-purity argon gas is continuously introduced as protection. gas;

[0024] (2) When the graphite crucible is preheated to 500°C, sprinkle an appropriate amount of RJ-2 covering agent evenly on the bottom of the crucible to avoid burning. Then add a small piece of high-purity magnesium ingot, raise the temperature to 720±20°C and keep it warm for 20 minutes. After the high-purity magnesium ingot is completely melted, remove ...

Embodiment 2

[0028] The difference between this example and Example 1 is that the as-cast biodegradable Mg-Ca-Mn-Sn magnesium alloy ingot is subjected to homogenization annealing at 400°C for 12 hours to obtain a homogenized biodegradable Mg-Ca- Mn-Sn magnesium alloy.

Embodiment 3

[0030] The difference between this embodiment and embodiment 2 is that dies with different sizes and forming sections are selected, and the homogenized annealed Mg-Ca-Mn-Sn magnesium alloy is subjected to conventional hot extrusion to obtain the desired extrusion ratio. Rod or lath extruded magnesium alloy, the extrusion temperature is 300°C, and the extrusion speed is 5mm / s.

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Abstract

The invention discloses a biodegradable Mg-Ca-Mn-Sn magnesium alloy material and a preparation method and application thereof. The biodegradable Mg-Ca-Mn-Sn magnesium alloy material is prepared from the following components, by mass percentage, 0.5-3% of Ca, 0.1-2% of Mn, 1-5% of Sn and the balance Mg and inevitable impurity elements brought in by raw materials. The specific preparation method includes smelting of the raw materials, casting molding, uniform annealing treatment and hot extrusion processing. The biodegradable Mg-Ca-Mn-Sn magnesium alloy has no any toxicity on human bodies and is good in mechanical performance, the preparation method is simple and low in cost, plate-shaped and rod-shaped materials in different size and cross section requirements can be prepared as required, and the biodegradable Mg-Ca-Mn-Sn magnesium alloy material can be used for preparation of bone lamellae, bone nails and other orthopedic implants, cardiovascular stents and other medical materials.

Description

technical field [0001] The invention belongs to the technical field of medical implant materials, and relates to a biodegradable Mg-Ca-Mn-Sn magnesium alloy material and a preparation method and application thereof. Background technique [0002] At present, the traditional medical metal materials commonly used clinically mainly include medical stainless steel, medical titanium alloy, and medical cobalt alloy. The release of toxic elements; the modulus of elasticity of traditional medical metal materials is higher than that of human bones; a secondary operation is required to remove it. [0003] Magnesium alloys as medical metal materials can be traced back more than 100 years ago. However, due to the poor corrosion resistance of magnesium alloys, the degradation rate in the human body is too fast to meet the performance requirements of medical implants, thus limiting the use of magnesium alloys as medical implants. Wide application of implants. But early clinical applicati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06A61L27/04A61L31/02A61L27/58A61L31/14
CPCA61L27/047A61L27/58A61L31/022A61L31/148C22C1/03C22C23/00C22F1/06
Inventor 于彦东孙兆妹李磊李剑张海波霍小春李毅
Owner HARBIN UNIV OF SCI & TECH
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