Preparation method of nano-particle reinforcement magnesium-based biocomposite material

A composite material and nanoparticle technology is applied in the field of preparation of nanoparticle reinforced magnesium-based biocomposite materials, which can solve the problems of high corrosion rate and poor plasticity of composite materials, improve comprehensive performance, refine magnesium alloy matrix grains, The effect of improving uniformity

Inactive Publication Date: 2014-06-18
TIANJIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

However, since the composite materials are all prepared by powder metallurgy process, the defects of the process (porosity of the finished product, enhanced particle dispersion uni

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  • Preparation method of nano-particle reinforcement magnesium-based biocomposite material

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[0024] Examples:

[0025] A method for preparing nano-particle-reinforced magnesium-based biocomposite materials uses a combination of melt shear stirring and equal-channel angular extrusion to prepare a particle-reinforced metal-based composite material. The steps are as follows:

[0026] 1) at 10 -3 Under Pa vacuum conditions and argon protection, the base alloy raw material is kept at a temperature of 720°C until it is completely melted to obtain a melt. The base alloy raw material is a magnesium alloy, and the alloying elements in the magnesium alloy are Zn and Ca. The mass of the constituent elements is: 958.89g of pure magnesium particles, 20g of zinc particles, and 11.11g of Ca particles;

[0027] 2) Pre-heat treatment of Ca-P ceramic particles with a particle size of 400-500nm at a temperature of 200°C for 2h, and then mix and grind 10g of Ca-P ceramic particles with 10g of pure magnesium particles, and the grinding time is 120min ;

[0028] 3) Add 20g of the above-mentioned ...

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Abstract

The invention relates to a preparation method of a nano-particle reinforcement magnesium-based biocomposite material. The preparation method comprises the following steps: (1) melting a matrix alloy raw material to form a melt; (2) mixing and grinding Ca-P ceramic particle powder after pre-heating treatment and pure magnesium particle powder; (3) adding the grinded mixed powder to the melt to mechanically stir, and then carrying out secondary stirring on the composite melt added with particles by adopting a melt shearing stirring device to obtain magnesium-based composite material melt sizing agent; (4) pouring the melt sizing agent into a preheating casting mould, and cooling to room temperature to obtain an as-cast magnesium-based composite material; and (5) carrying out equal channel angular pressing on the as-cast magnesium-based composite material after heating to improve distributive uniformity of the ceramic particles to prepare the target object, namely the nano-particle reinforcement magnesium-based biocomposite material. By utilizing the preparation method, distributive uniformity of ceramic phase particles in a magnesium metallic matrix can be improved, grain size of the magnesium metallic matrix can be thinned, and combination property of the magnesium-based composite material can be improved.

Description

technical field [0001] The invention relates to the preparation of biomedical metal-based composite materials, in particular to a method for preparing nanoparticle-reinforced magnesium-based bio-composite materials. Background technique [0002] In recent years, research on magnesium and magnesium alloys as new biodegradable implant materials has attracted much attention. Magnesium is an important nutrient element for the human body and has a good foundation for biological safety; its density and elastic modulus are close to those of human bone to avoid stress shielding effects. ; Using the corrosion reaction between magnesium and body fluids, its degradation and absorption in the body can be realized; the resources are abundant and the price is relatively low. Based on the above characteristics, the clinical application of magnesium and magnesium alloys as absorbable human implant materials is of great significance. At present, the biggest problem limiting the clinical app...

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Application Information

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IPC IPC(8): C22C23/00C22C1/02C22C1/10C22F1/06
Inventor 刘德宝宋融刘一驰陈民芳
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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