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Preparation method of three dimensional nanometer porous titanium and alloy thereof

A three-dimensional nano- and nano-porous technology, applied in the field of nano-metal materials, can solve the problems of explosion, high safety requirements, complex process, etc., and achieve the effects of high safety, simple and easy process, and easy operation.

Active Publication Date: 2015-08-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pure magnesium in the molten state is used as the medium for dealloying, which requires special equipment, complex process, and high safety requirements. Putting titanium-copper alloy in the molten state is easy to introduce other gases or even explode.

Method used

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  • Preparation method of three dimensional nanometer porous titanium and alloy thereof
  • Preparation method of three dimensional nanometer porous titanium and alloy thereof
  • Preparation method of three dimensional nanometer porous titanium and alloy thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation of nanoporous α-titanium porous metal material, the specific process is as follows:

[0026] ①According to the atomic number ratio of titanium to copper is 30:70, weigh the titanium powder and copper powder, put them into a ball mill tank for ball milling, the ball material ratio is 8:1, the ball milling medium is n-hexane, the ball milling time is 20 hours, fully ball milling, Make it evenly mixed, and the powder becomes finer; take the titanium-copper powder that has been ball-milled, and sinter it with spark plasma sintering technology to prepare the titanium-copper master alloy. The heating rate is 50°C / min, and the pressure is 80MPa. Dense master alloy block, the sintering temperature is 750°C, and the holding time is 20min;

[0027] ② Wire cut the prepared titanium-copper master alloy block into small slices with a thickness of 0.2mm, clean the oil stains on the surface with deionized water and alcohol, and then dry them in a vacuum drying oven for...

Embodiment 2

[0033] The preparation of nanoporous α-titanium porous metal material, the specific process is as follows:

[0034] ① According to the atomic number ratio of titanium 40% nickel 60%, weigh titanium and nickel raw materials. The raw materials are put into a special melting furnace for titanium alloy and smelted at 1700°C for 5 hours to make the structure homogeneous and fully solid-soluted, and the temperature is lowered to obtain a titanium-nickel master alloy.

[0035] ② Cut the prepared titanium-nickel master alloy block into small slices with a thickness of 0.02mm, wash off the oil stains on the surface with deionized water and alcohol, and then dry them in a vacuum drying oven for 4 hours at a drying temperature of 50°C. spare;

[0036] ③ Coat the above-mentioned small flakes with magnesium-calcium powder with a particle size of 1.0 microns, and dealloy them in argon-protected hot-press sintering at a sintering temperature of 600°C; holding time for 10 minutes;

[0037] ...

Embodiment 3

[0039] The preparation of nanoporous α-titanium porous metal material, the specific process is as follows:

[0040] ① According to the atomic number ratio of 20% titanium to 80% silicon, weigh titanium and silicon raw materials. The raw materials are put into a special melting furnace for titanium alloy and smelted at 1720°C for 6 hours to homogenize the structure and fully solidify. The temperature is lowered and cooled to obtain a titanium-silicon master alloy.

[0041] ② Wire-cut the prepared titanium-silicon master alloy block into small slices with a thickness of 0.1mm, wash off the oil stains on the surface with deionized water and alcohol, and then dry them in a vacuum drying oven for 6 hours at a drying temperature of 80°C ,spare;

[0042] ③ Coat the above-mentioned small flakes with magnesium-lithium powder with a particle size of 10 nanometers, and dealloy them in vacuum-protected discharge plasma sintering. The sintering temperature is 500 ° C; the holding time is...

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Abstract

The invention provides a preparation method of three dimensional nanometer porous titanium and alloy thereof. The method adopts a powder coated solid phase sintering technology, and comprises the following steps: coating a mother alloy block with a dealloying medium material with magnesium metal or magnesium alloy powder as the dealloying medium material, and carrying out heat insulation sintering; and dissolving the surface coating dealloying medium material to prepare nanometer porous pure alpha titanium with a three dimensional block structure or nanometer porous beta titanium alloy. A powder metallurgy magnesium powder coated titanium alloy sintering dealloying technology is adopted, a solid phase dealloying technology adopting the magnesium-based powder as the dealloying medium is used to prepare the nanometer porous pure alpha titanium and beta titanium alloy, so the use amount of the magnesium powder can be stoichiometrically controlled according to the mass of a titanium alloy sample, the porosity of the prepared nanometer alpha titanium and beta titanium alloy is above 60%, and the aperture dimension is 1-100nm.

Description

technical field [0001] The invention relates to a preparation method of three-dimensional nanoporous titanium and its alloy, belonging to the technical field of nanometer metal materials. Background technique [0002] Porous material is a brand-new material system developed in the last century. It is a network material composed of interconnected or closed holes. The boundary or surface of the hole is composed of pillars or plates. Nanoporous materials are an important part of porous materials, which refer to porous solid materials with significant surface effects, pore diameters ranging from 0.1 to 100nm, porosity greater than 40%, and high specific surface areas; it includes inorganic nanoporous materials, such as silicon Molecular sieves, ceramic nanoporous materials, and metallic nanoporous materials. [0003] Nanoporous metals are a class of metal materials with special structures, which are composed of nanoscale metal framework and its pores. Compared with dense metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C14/00
Inventor 张法明李萍
Owner SOUTHEAST UNIV
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