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Degradable biomedical mg-nd-sr ​​magnesium alloy and its preparation method and application

A biomedical and magnesium alloy technology, applied in the field of biomedical implant materials, can solve problems such as neurotoxicity, achieve good biocompatibility, reduce content, and require low equipment requirements

Inactive Publication Date: 2017-04-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, for biomedical magnesium alloys, alloy elements that are harmful to the human body cannot be introduced. For example, although Al can improve the corrosion resistance of magnesium alloys, it has neurotoxicity and can easily lead to Alzheimer's disease.

Method used

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  • Degradable biomedical mg-nd-sr ​​magnesium alloy and its preparation method and application
  • Degradable biomedical mg-nd-sr ​​magnesium alloy and its preparation method and application
  • Degradable biomedical mg-nd-sr ​​magnesium alloy and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation of the Mg-1.91%Nd-0.27%Sr magnesium alloy of the present embodiment, the specific preparation process is:

[0044] (1) With the high-purity magnesium ingot, the Mg-Nd master alloy whose mass percentage content of Nd is 30%, and the Mg-Sr master alloy whose mass percentage content of Sr is 25% as raw materials, according to the Nd and Sr master alloys in the two master alloys The weight percentage composition is by weight percentage 1.91%Nd, 0.27%Sr, all the other are Mg and carry out material preparation;

[0045] (2) Sprinkle a certain amount of RJ-5 flux on the wall and bottom of the reaction vessel in advance, preheat the reaction vessel to about 400°C, add high-purity magnesium ingots and raise the temperature to 720°C, after the magnesium ingots are melted, heat up to 750°C and add Mg in turn -Nd and Mg-Sr master alloys, after the Mg-Nd master alloys are completely melted, add Mg-Sr master alloys, and keep stirring to mix them evenly to obtain alloy...

Embodiment 2

[0056] The preparation of the Mg-1.48%Nd-2.49%Sr magnesium alloy of the present embodiment, the specific preparation process is:

[0057] (1) With the high-purity magnesium ingot, the Mg-Nd master alloy whose mass percentage content of Nd is 30%, and the Mg-Sr master alloy whose mass percentage content of Sr is 25% as raw materials, according to the Nd and Sr master alloys in the two master alloys The weight percentage composition is by weight percentage 1.48%Nd, 2.49%Sr, all the other are Mg and carry out material preparation;

[0058] (2) Sprinkle a certain amount of RJ-5 flux on the wall and bottom of the reaction vessel in advance, preheat the reaction vessel to about 400°C, add high-purity magnesium ingots and raise the temperature to 710°C, after the magnesium ingots melt, heat up to 750°C and add Mg in turn -Nd and Mg-Sr master alloys, after the Mg-Nd master alloys are completely melted, add Mg-Sr master alloys, and keep stirring to mix them evenly to obtain alloy melts...

Embodiment 3

[0068] The preparation of the Mg-2.07%Nd-0.24%Sr magnesium alloy of the present embodiment, the specific preparation process is:

[0069] (1) With the high-purity magnesium ingot, the Mg-Nd master alloy whose mass percentage content of Nd is 30%, and the Mg-Sr master alloy whose mass percentage content of Sr is 25% as raw materials, according to the Nd and Sr master alloys in the two master alloys The weight percentage composition is by weight percentage 2.07%Nd, 0.24%Sr, all the other are Mg and carry out material preparation;

[0070] (2) Sprinkle a certain amount of RJ-5 flux on the wall and bottom of the reaction vessel in advance, preheat the reaction vessel to about 400°C, add high-purity magnesium ingots and raise the temperature to 720°C, after the magnesium ingots are melted, heat up to 740°C and add Mg in turn -Nd and Mg-Sr master alloys, after the Mg-Nd master alloys are completely melted, add Mg-Sr master alloys, and keep stirring to mix them evenly to obtain alloy...

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Abstract

The invention belongs to the technical field of biomedical materials and particularly relates to degradable biomedical Mg-Nd-Sr magnesium alloy as well as a preparation method and application thereof. The degradable biomedical Mg-Nd-Sr magnesium alloy comprises the following components in percentage by weight: 1.00-3.00% of Nd, 0.10-3.00% of Sr and the balance of Mg and unavoidable impurity elements. The preparation method of the alloy comprises the thermal treatment technology and the hot extrusion processing technology, Mg, Mg-Nd intermediate alloy and Mg-Sr intermediate alloy are sequentially smelted under the condition of covering agent protection, a refining agent is added for refining after the smelting, and after component detection, casting moulding is performed to obtain cast-condition degradable biomedical Mg-Nd-Sr magnesium alloy. Through reasonable thermal treatment technology and hot extrusion processing technology, polymorphic Mg-Nd-Sr magnesium alloy with excellent biocompatibility and different mechanical properties can be obtained, and the obtained polymorphic Mg-Nd-Sr magnesium alloy can be applicable to orthopaedic implant materials and intravascular stent medical materials of different occasions as demanded.

Description

technical field [0001] The invention belongs to the technical field of biomedical implant materials, and in particular relates to a degradable biomedical Mg-Nd-Sr magnesium alloy and its preparation method and application. Background technique [0002] Biomedical implant materials are a new type of high-tech materials used to diagnose, treat, repair or replace human tissues and organs or enhance their functions. People's growing health needs and health problems caused by diseases, natural disasters and man-made disasters have prompted the rapid development of biomedical implant materials. According to the Ministry of Industry and Information Technology's "New Material Industry "Twelfth Five-Year" Development Plan", it is estimated that in 2015, 500,000 sets of artificial joints and 1.2 million vascular stents will be needed per year, and the demand for biomedical materials will increase significantly. Biodegradable biomedical implant materials can avoid the economic burden ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06
Inventor 康志新桂珍珍刘勇张俊逸李元元
Owner SOUTH CHINA UNIV OF TECH
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