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Preparation method of titanium fiber porous material

A porous material and titanium fiber technology, applied in the field of metal porous materials, can solve the problems of unresolved pore structure uniformity, affecting material physical and chemical properties, and weakness

Active Publication Date: 2013-10-16
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

However, so far, the relevant basic research on metal fiber porous materials is very weak, and the existing research only stays at the local technical level. For example, the forming process borrows the air-felting technology in the production of non-woven fabrics. The wire diameter, length-to-diameter ratio, surface state, elasticity, etc. of metal fibers are significantly different from those of cotton, hemp or other organic synthetic fibers used in textiles, and the uniformity of the pore structure of metal fibers after felting has not been resolved; On the one hand, metal fiber sintering is more difficult than metal powder sintering, and the formation of sintering nodes is accompanied by recrystallization of fibers and even abnormal grain growth, which seriously affects the final physical and chemical properties of materials.

Method used

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  • Preparation method of titanium fiber porous material
  • Preparation method of titanium fiber porous material
  • Preparation method of titanium fiber porous material

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preparation example Construction

[0034] see figure 1 , the preparation method of titanium fiber porous material of the present invention, the method comprises the following steps:

[0035] (a) The titanium wire is drawn by a single wire of the water tank wire drawing machine, and the titanium wire is subjected to stress annealing twice, so that the titanium wire is drawn into a 120-70 μm fiber shape.

[0036] (b) Weave the titanium wire drawn into a fibrous shape into a titanium fiber mesh according to the wire weaving method, wherein the metal wire weaving method includes plain weave method, twill weave method, plain weave Dutch weave method, twill weave Dutch weave method or reverse To the Dutch weaving method.

[0037] (c) Cut the titanium fiber mesh into titanium fiber mesh blocks of different sizes, and mix the titanium fiber mesh blocks of different sizes evenly. The relationship, that is, P=1-m / Vρ s (1)

[0038] In the formula (1), P is the porosity of the porous material, m is the mass of the ...

Embodiment 1

[0049] Before and after the sintering of the titanium fiber porous material, the chemical analysis of the oxygen content was carried out with a sample oxygen and nitrogen measuring instrument. The oxygen content on the surface of the titanium fiber before sintering was measured to be 120ppm, and the surface oxygen content was measured to be 130ppm after sintering at 1250°C. The oxygen content did not increase significantly before and after sintering. After sintering at 1250°C, the phase composition of the titanium fiber porous material was analyzed by XRD, and the spectrum is as follows figure 2 shown. The calibration results of the diffraction peaks show that the sintered structure is mainly composed of ɑ-Ti, and there is a small amount of titanium oxide Ti2O, and no diffraction peak of TiO2 is found in the diffraction spectrum. It shows that before and after sintering at 1250°C, the material substance remains consistent and similar to the prepared similar material, and the ...

Embodiment 2

[0051] It can be seen that the pore size distribution diagram of the titanium fiber with a diameter of 70 μm in Figure 3 (a) has a high concentration of pore size distribution, and the pore size of 30 μm accounts for about 55%, indicating that the pore size of the material is relatively consistent and the pore structure is relatively neat. Comparing Figure 3(b) with a fiber diameter of 100 μm and Figure 3(c) with a fiber diameter of 120 μm, Figure 3(c) has a larger pore size and a more dispersed pore structure.

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Abstract

The invention provides a preparation method of a titanium fiber porous material, which has controllable fiber diameter and porosity. The material is prepared by: drawing a titanium wire into a fibrous state, and then carrying out weaving and compression molding. After the material is prepared, pickling is conducted to remove of the oxide on the surface of the titanium fiber porous material, and then the material is subjected to high temperature sintering by a vacuum sintering furnace. By means of the method provided in the invention, a sintered titanium fiber porous material can be obtained, and all properties of the titanium fiber porous material are greatly improved. Thus, the method provides an important basis for realization of product industrialization.

Description

technical field [0001] The invention belongs to the field of metal porous materials, and mainly relates to a preparation method of titanium fiber porous materials. Background technique [0002] Sintered metal porous material has a kind of metal material with through channels. It not only has the inherent characteristics of metal, such as electrical conductivity, thermal conductivity, plasticity, weldability, etc., but also has a series of functions because of the pore size and pore size distribution, and the porosity can be controlled arbitrarily. Characteristics, such as high permeability, high specific surface area, energy absorption, capillarity, fire resistance and heat insulation, etc., are widely used in industry for filtration and separation, fluid distribution, noise reduction, shock resistance, surface combustion, fire resistance, heat exchange, Heat pipes, catalyst carriers, ionization, self-lubrication, sweating and biological implants, etc. Titanium and titanium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C14/00
Inventor 刘世锋奚正平汤慧萍杨鑫张朝晖
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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