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A kind of magnesium alloy containing trace amount of ytterbium and preparation method thereof

A magnesium alloy and alloy technology, which is applied in the field of medical metal materials and its preparation, can solve the problems of lack of protection of the substrate, restrictions on wide application, corrosion ion penetration, etc., to improve mechanical properties and corrosion resistance, and low addition of rare earths , the effect of reducing the degradation rate

Active Publication Date: 2022-02-18
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the corrosion product film formed on the surface is relatively loose, which cannot protect the substrate, but is more likely to cause the penetration of corrosion ions, further accelerating the corrosion reaction.
Its shortcomings such as low absolute strength and poor corrosion resistance seriously restrict its wide application.

Method used

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  • A kind of magnesium alloy containing trace amount of ytterbium and preparation method thereof
  • A kind of magnesium alloy containing trace amount of ytterbium and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The components and their mass percentages of the magnesium alloy in this example are: Yb 0.5% and the rest is Mg, denoted as Mg–0.5 Yb;

[0025] The magnesium alloy containing trace ytterbium and its preparation method include four steps of melting, solid solution, extrusion and annealing:

[0026] The smelting is: in SF 6 +CO 2 Pure magnesium was melted under the protection of mixed gas, and after fully dissolved, Mg-Yb master alloy with Yb content of 0.5 % by weight of the final smelted alloy was added at 750 ºC, and the spiral electromagnetic field was used for continuous stirring for 5 min, and then it was allowed to stand at 700 ºC. Incubate for 15 min to remove slag, then pour out the furnace and naturally cool to room temperature;

[0027] The solid solution is as follows: heat preservation at 400 °C for 24 h to ensure that the coarse second phase is redissolved and the grains do not grow abnormally, and then water is cooled to room temperature;

[0028] The e...

Embodiment 2

[0033] The components and their mass percentages of the magnesium alloy in this example are: Yb 1.0% and the rest are Mg, denoted as Mg–1.0 Yb;

[0034] The magnesium alloy containing trace ytterbium and its preparation method include four steps of melting, solid solution, extrusion and annealing:

[0035] The smelting is: in SF 6 +CO 2 Pure magnesium was melted under the protection of mixed gas, and after fully dissolved, Mg-Yb master alloy with Yb content of 1.0 % by weight of the final smelted alloy was added at 760 ºC, and the spiral electromagnetic field was used for continuous stirring for 8 min, and then allowed to stand at 710 ºC. Incubate for 20 min to remove slag, then pour out the furnace and naturally cool to room temperature;

[0036] The solid solution is as follows: heat preservation at 400 °C for 24 h to ensure that the coarse second phase is redissolved and the grains do not grow abnormally, and then water is cooled to room temperature;

[0037] The extrusi...

Embodiment 3

[0042] The components and their mass percentages of the magnesium alloy in this example are: Yb 1.5% and the rest is Mg, denoted as Mg–1.5 Yb;

[0043] The magnesium alloy containing trace ytterbium and its preparation method include four steps of melting, solid solution, extrusion and annealing:

[0044] The smelting is: in SF 6 +CO 2 Pure magnesium was melted under the protection of mixed gas, and after fully dissolved, Mg-Yb master alloy with Yb content of 1.5 % by weight of the final smelted alloy was added at 770 ºC, and stirred continuously for 10 min using a spiral electromagnetic field, and then allowed to stand at 710 ºC. Incubate for 18 min to remove slag, then pour out of the furnace and naturally cool to room temperature;

[0045] The solid solution is as follows: heat preservation at 450 °C for 36 h to ensure that the coarse second phase is redissolved and the grains do not grow abnormally, and then water is cooled to room temperature;

[0046] The extrusion is...

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Abstract

The invention discloses a magnesium alloy containing a trace amount of ytterbium and a preparation method thereof. The mass percentage of ytterbium in the magnesium alloy is 0.5-1.5%. The preparation steps include smelting→solid solution→hot extrusion→annealing. The invention significantly improves the comprehensive performance of pure magnesium by adding a trace amount of ytterbium, has good strength, plasticity, corrosion resistance and cell compatibility, and can be used as a candidate material for preparing degradable medical implants.

Description

technical field [0001] The invention relates to the technical field of medical metal materials and preparation thereof, in particular to a magnesium alloy containing trace ytterbium and a preparation method thereof. Background technique [0002] Magnesium alloys have become a research hotspot of structural materials in recent years due to their low density, high specific strength and high specific stiffness. The density of pure magnesium is 1.73 g / cm3, which is about 2 / 3 of the density of aluminum and 1 / 4 of the density of steel. It is currently the lightest metal structural material. In today's promotion of energy saving and environmental protection and the pursuit of light weight, the advantages of magnesium alloys are obvious. Magnesium alloys also have many other advantages, such as good casting properties, machinability, damping properties and electromagnetic shielding properties. In addition, its excellent biocompatibility also makes magnesium and its alloys potentia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/02C22F1/06
CPCC22C23/06C22C1/02C22F1/06
Inventor 李路刘纯荣张存才周伟白雪钟慧玲蒋静雯
Owner SOUTHWEST UNIV
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