Preparation method of anisotropic biomedical directional solidification magnesium-zinc alloy material

A technology of directional solidification and anisotropy, which is applied in the field of anisotropic biomedical directional solidification magnesium-zinc alloy materials, can solve problems such as too fast degradation of magnesium-zinc alloys, equiaxed crystal structures that cannot meet the requirements of anisotropy, and achieve The effect of convenient operation and simple equipment

Inactive Publication Date: 2018-04-27
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is a preparation method of anisotropic biomedical directional solidified magnesium-zinc alloy material, which solves the problem of too fast degradation of magnesium-zinc alloy prepared by conventional casting methods, and the random orientation of equiaxed crystal structure is difficult to meet the requirements of biological implant devices for various materials. Anisotropy requirements and ot...

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  • Preparation method of anisotropic biomedical directional solidification magnesium-zinc alloy material
  • Preparation method of anisotropic biomedical directional solidification magnesium-zinc alloy material
  • Preparation method of anisotropic biomedical directional solidification magnesium-zinc alloy material

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Embodiment 1

[0035] In this embodiment, the method for preparing anisotropic biomedical directionally solidified magnesium-zinc alloy material has the following specific steps:

[0036] (1) Put 192 grams of Mg (purity 99.99wt%) and 8 grams of Zn (purity 99.99wt%) in a low-carbon steel crucible, smelt Mg-4Zn magnesium alloy at 730℃, keep the temperature for 30 minutes and then cool to 680℃ Cast, get Bar

[0037] (2) Put The rod is placed in a high-purity corundum tube for directional solidification preparation, the directional solidification heating temperature is 800°C, the temperature gradient is 10°C / mm, and the drawing speed is 120μm / s;

[0038] (3) Using XRD, EBSD and TEM techniques to determine the growth orientation of directionally solidified Mg-4Zn alloy bars, and respectively determine the corrosion performance of different orientation crystal faces in 0.9% NaCl solution, and then determine the corrosion resistance of the crystal faces in Hank's simulation Degradation performance in b...

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Abstract

The invention relates to the field of metal material solidification control and preparation, in particular to a preparation method of an anisotropic biomedical directional solidification magnesium-zinc alloy material. The method comprises the steps that a magnesium-zinc alloy is molten in a resistance furnace firstly, a bar is prepared in a direct pouring mode or by cutting a cast ingot, then a magnesium-zinc alloy with specific growth orientation and a microstructure is prepared on a directional solidification device, and the magnesium-zinc alloy material is cut in different orientations according to required performance of biomedical application. By combination of a directional solidification technology and an orientation analysis technology, the anisotropic biomedical directional solidification magnesium-zinc alloy material can be prepared, the directional solidification magnesium alloy with the different orientations and the microstructure is obtained, the problems that an existingmagnesium alloy material is low in mechanical property and too high in degrading speed during biomedical application are solved, and the method is suitable for preparing various biomedical magnesium-zinc alloy materials.

Description

Technical field [0001] The invention relates to the field of solidification control and preparation of metal materials, in particular to a preparation method of an anisotropic biomedical directionally solidified magnesium-zinc alloy material. Background technique [0002] As a biomedical metal material, magnesium alloy has significant advantages, such as good biodegradability, biocompatibility, elastic modulus close to human bone, etc., so it has received increasing attention and has become an important research topic in magnesium alloys in recent years. direction. Most of the related research work in the early stage focused on the design and selection of the composition of magnesium alloys. The research on the solidification structure is mostly to control the solidification conditions to obtain fine equiaxed crystals to improve the properties of the alloy. However, magnesium alloy bio-implanted devices have anisotropic requirements for mechanical properties and degradation prop...

Claims

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Application Information

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IPC IPC(8): B22D27/04C22C23/04
CPCB22D27/045C22C23/04
Inventor 杨院生贾红敏冯小辉李应举罗天骄
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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