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Method for quickly preparing titanium aluminum porous material

A porous material, titanium-aluminum technology, applied in the field of preparation of titanium-aluminum porous materials, can solve the problems of high specific strength and specific elastic modulus, long sintering time, energy consumption, etc., to shorten the process, reduce the sintering process and reduce pollution Effect

Active Publication Date: 2019-06-21
超精(苏州)航空精密机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Titanium-aluminum intermetallic compounds have low density, high specific strength and specific elastic modulus, and can still maintain high enough strength and stiffness at high temperatures. At the same time, it also has good creep and oxidation resistance. This type of material is introduced into the field of porous materials, but most of them adopt the reaction sintering process, which requires a long sintering time and consumes a lot of energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: A method for rapidly preparing a titanium-aluminum porous material. According to the proportion of 40at% Ti powder and 60at% Al powder, a planetary ball mill is used for uniform powder mixing; the size of Ti powder and Al powder is between 40 μm; Using the method of cold pressing, it is pressed into a cylindrical prefabricated block with a diameter of 40mm and a height of 18mm, and the pressure is 50MPa; then, using a high-temperature self-propagating sintering process, the prefabricated block is heated in an induction coil. The power of 1KW is used for heating within 2 minutes, and the prefabricated block heats up rapidly by using the exothermic self-heating and heat conduction between titanium and aluminum. When the temperature reaches close to 667°C, the prefabricated block heats up rapidly. The internal temperature rises rapidly from close to 667°C to 1150°C; when the exothermic reaction of titanium and aluminum ends, the temperature begins to drop, and wh...

Embodiment 2

[0024] Example 2: A method for rapidly preparing a titanium-aluminum porous material. According to the proportion of 60at% Ti powder and 40at% Al powder, a planetary ball mill is used for uniform powder mixing; the size of Ti powder and Al powder is between 150 μm; Using the method of cold pressing, it is pressed into a cylindrical prefabricated block with a diameter of 40mm and a height of 22mm, and the pressure is 500MPa; then, using a high-temperature self-propagating sintering process, the prefabricated block is placed in the induction coil for heating. The power of 3KW is used for heating within 4 minutes, and the prefabricated block heats up rapidly by using the exothermic self-heating and heat conduction between titanium and aluminum. When the temperature reaches close to 667°C, the prefabricated block heats up rapidly. The internal temperature rises rapidly from close to 667°C to 1200°C; when the exothermic reaction of titanium and aluminum ends, the temperature begins ...

Embodiment 3

[0025] Example 3: A method for rapidly preparing a titanium-aluminum porous material, using a planetary ball mill for uniform powder mixing according to the proportion of 50at% Ti powder and 50at% Al powder; the size of Ti powder and Al powder is between 100 μm; The method of cold pressing is used to press into a cylindrical prefabricated block with a diameter of 41mm and a height of 20mm, and the pressure is 300MPa; then, a high-temperature self-propagating sintering process is used to heat the prefabricated block in an induction coil. The power of 2KW is used for heating within 3 minutes, and the prefabricated block heats up rapidly by using the exothermic self-heating and heat conduction between titanium and aluminum. When the temperature reaches close to 667°C, the prefabricated block heats up rapidly. The internal temperature rises rapidly from close to 667°C to 1158°C; when the exothermic reaction of titanium and aluminum ends, the temperature begins to drop, and when it ...

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PUM

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Abstract

The invention discloses a method for quickly preparing a titanium aluminum porous material. The method for quickly preparing the titanium aluminum porous material comprises the following steps of S1,uniformly mixing powder according to the matching ratio of the components, namely 40 to 60at percent of Ti powder and 60 to 40at percent of Al powder, wherein the sizes of the Ti powder and the Al powder range from 40 to 150mum; S2, adopting a cold press molding method, and pressing to obtain a precast block, wherein the pressure is 50 to 500MPa; S3, adopting a high-temperature self-propagating sintering process, placing the precast block into an induction coil, heating, adopting 1 to 3KW power for heating within 2 to 4 minutes at the initial sintering stage, and quickly warming the precast block by utilizing self-heating and heat-conducting functions of heat release between titanium and aluminum, wherein when the temperature reaches to be close to 667 DEG C, the precast block is quickly warmed, and within the period of 10 to 12s, the temperature quickly rises to 1150 to 1200 DEG C from approximate 667 DEG C; after completing titanium aluminum exothermic reaction, starting to lower thetemperature, continuously warming when the temperature reaches to 1100 to 1120 DEG C, and enabling the temperature to reach to 1280 to 1320 DEG C; and during sintering, adopting argon shield, whereinthe oxygen content is less than or equal to 20ppm; and S4, after completing reaction, cooling the precast block in argon. The method for quickly preparing the titanium aluminum porous material provided by the invention has the beneficial effects that the sintering process is reduce, the flow is shortened, and the process is simple.

Description

technical field [0001] The invention relates to a method for preparing a titanium-aluminum porous material, which belongs to the technical field of intermetallic compounds. Background technique [0002] Porous materials are a class of materials composed of a certain volume fraction of various forms of voids as beneficial components, pores and continuous homogeneous or heterogeneous matrix. It is considered to be an important factor for sustainable development and the promotion of environmentally friendly industrial development One of the supports, has become a high-performance functional-structural material with great application potential. Due to the pores distributed in a certain pore size range, large specific surface area, adsorption capacity and many special properties, porous materials can realize various functions such as filtration, sound insulation, heat insulation, shock resistance, adsorption, etc., and are widely used in aerospace, energy, Many industrial fiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C14/00B22F3/11B22F3/23
Inventor 苏勇君林云峰张娜叶晓平杨婧
Owner 超精(苏州)航空精密机械制造有限公司