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Preparation method of structure-controllable magnesium-based three-dimensional porous material

A technology of three-dimensional porous and porous materials, applied in the field of materials, can solve the problems of high equipment requirements, high cost, difficult adjustment of porous material pore size and pore shape, etc., and achieve the effect of accurate and controllable structure

Active Publication Date: 2014-02-19
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the methods for preparing magnesium-based porous materials mainly include powder metallurgy and vacuum infiltration casting, etc., but these preparation methods have complex processes, high costs, high requirements for equipment, and the pore size and pore morphology of porous materials are not easy to adjust. and other shortcomings

Method used

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  • Preparation method of structure-controllable magnesium-based three-dimensional porous material
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  • Preparation method of structure-controllable magnesium-based three-dimensional porous material

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preparation example Construction

[0018] Such as figure 1 As shown, the preparation method of the structure-controllable magnesium-based three-dimensional porous material of the present invention includes the following contents:

[0019] First, design the three-dimensional space configuration for pore formation according to the set structure of the magnesium-based three-dimensional porous material to be prepared, and the porosity of the set structure is selected in the range of 5%-95%; then the metal wire is wound or Woven into this three-dimensional configuration, see figure 2 a. The metal wire is a metal wire such as iron wire, titanium wire or aluminum wire, with a diameter of 0.005mm-5mm; afterwards, the molten magnesium-based metal material is infiltrated into the three-dimensional configuration by pressureless infiltration or suction casting methods, After cooling to form a magnesium-based metal wire composite structure, see figure 2 b; Finally, a chemical corrosion method is used to remove the three-dimen...

example 1

[0022] According to the set structure of the magnesium-based three-dimensional porous material to be prepared, the three-dimensional space configuration for pore formation is designed, and the porosity of the set structure is 5%; then the iron wire with a diameter of 0.005mm is woven into the set structure and 95 % Porosity three-dimensional space configuration; through the suction casting technology, the Mg-RE alloy melt is injected into the three-dimensional space configuration, and the magnesium-based metal wire composite structure is formed after cooling; the magnesium-based metal wire composite structure is placed in the HF solution Soaked in medium for more than 72 hours, the iron wire in it is completely corroded and dissolved, forming a Mg-RE three-dimensional porous material with a porosity of 5%. Its compressive strength is 300MPa, and the elastic modulus is 40GPa. It is suitable for heat exchange, purification and filtration. .

example 2

[0024] According to the set structure of the magnesium-based three-dimensional porous material to be prepared, the three-dimensional space configuration for pore formation is designed, and the porosity of the set structure is 47%; then the titanium wire with a diameter of 0.26 mm is used to prepare it with a winding machine. Set the structure and the three-dimensional space configuration with 53% porosity; through the pressureless infiltration technology, infiltrate the medical pure magnesium melt into the three-dimensional space configuration, and form a magnesium-based metal wire composite structure after cooling; the magnesium-based metal wire The composite structure is immersed in HF solution for more than 72 hours, so that the titanium wire in it is completely corroded and dissolved, forming a Mg three-dimensional porous material with a porosity of 47%. Its compressive strength is 4.88MPa and elastic modulus is 0.24GPa, which is suitable for biological Fields such as medici...

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Abstract

The invention relates to a preparation method of a structure-controllable magnesium-based three-dimensional porous material. The base material of the porous material is pure magnesium or magnesium alloy and is filled with three-dimensional run-through pores. The porous material has the set structure according to the using requirement. The preparation method comprises the following steps: designing three-dimensional spatial configuration for pore forming according to the set structure; winding or weaving a metal wire to form the three-dimensional spatial configuration; infiltrating magnesium-based metal material molten liquid into the three-dimensional spatial configuration by a pressureless infiltration method or a suction casting method; cooling and forming a magnesium-based metal wire composite structure; removing the metal wire with the three-dimensional spatial configuration from the magnesium-based metal wire composite structure by a chemical corrosion method to form the magnesium-based three-dimensional porous material with the set structure. The magnesium-based three-dimensional porous material with different structures and properties are prepared by adjusting and changing the three-dimensional spatial configuration of the metal wire, so that the application requirements in the fields of biomedicine, energy exchange, purification and filtration, catalytic electrodes and the like are met.

Description

Technical field [0001] The invention relates to a method for preparing a novel material, in particular to a method for preparing a magnesium-based three-dimensional porous material with a controllable structure, and belongs to the technical field of materials. Background technique [0002] Porous materials are widely used in the fields of biomedicine, energy exchange, purification and filtration and catalytic electrodes due to their low density and excellent thermal, electrical and mechanical properties. Among them, porous magnesium (magnesium alloy) is due to its high specific strength and high specific rigidity. It is favored for its excellent performance, its rich content in nature and its low price. The current methods for preparing magnesium-based porous materials mainly include powder metallurgy and vacuum infiltration casting methods, but these preparation methods have complex processes, high costs, high requirements for equipment, and difficult adjustment of the pore size...

Claims

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Application Information

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IPC IPC(8): C22C1/08
Inventor 何国江国峰
Owner SHANGHAI JIAO TONG UNIV
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