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Pressure auxiliary self-spreading titanium aluminum carbon block material and preparation thereof

A block material, titanium aluminum carbon technology, applied in the field of titanium aluminum carbon block material and its preparation, can solve the problems of long preparation time, low efficiency, low purity, etc., and achieve the effect of high production efficiency

Inactive Publication Date: 2010-09-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a pressure-assisted self-propagating titanium-aluminum-carbon block material and its preparation method in order to solve the problems of low purity, long preparation time and low efficiency of the existing titanium-aluminum-carbon block materials.

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  • Pressure auxiliary self-spreading titanium aluminum carbon block material and preparation thereof
  • Pressure auxiliary self-spreading titanium aluminum carbon block material and preparation thereof

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specific Embodiment approach 1

[0012] Specific Embodiment 1: In this embodiment, the pressure-assisted self-propagating titanium-aluminum-carbon block material is made of 70.7% titanium powder, 20.5% aluminum powder and 8.8% carbon black powder in mass percentage.

[0013] In this embodiment, the titanium powder has a purity of 99%, and the particle size of the titanium powder is less than 325 mesh; the aluminum powder has a purity of 99%, and the particle size of the aluminum powder is less than 200 mesh; the carbon black powder has a purity of 99.9%, and the particle size of the carbon black powder is less than 5 μm.

specific Embodiment approach 2

[0014] Specific embodiment two: The pressure-assisted self-propagating titanium-aluminum-carbon block material of this embodiment is prepared according to the following method: 1. Mix 70.7% titanium powder, 20.5% aluminum powder and 8.8% carbon black powder by mass percentage , to get mixed powder; two, absolute ethanol and mixed powder are mixed according to the mass ratio of (0.4~0.6): 1, ball milling 2~8h with 150~300r / min speed at normal temperature, get mixed homogenate; The mixed homogenate is dried at 50-70°C, and then passed through a 100-mesh sieve to obtain a mixed powder; 4. The mixed powder is preformed under a molding pressure of 10-200MPa for 15-300s to obtain Green body; 5. Put resistance wire and igniter on the green body in turn, and then pass current to the resistance wire to ignite the igniter to trigger the green body to perform self-propagating high-temperature synthesis, and burn for 5-10s; 6. Self-propagating high-temperature synthesis The product is kep...

specific Embodiment approach 3

[0018] Embodiment 3: The difference between this embodiment and Embodiment 2 is that in step 2, absolute ethanol and mixed powder are mixed in a mass ratio of 0.5:1. Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention discloses a pressure-assisted self-propagating titania-alumina carbon block material and a method for preparing the same and relates to a titania-alumina carbon block material and a method for preparing the same, solving the problems that the prior titania-alumina carbon block material is low in purity, time consuming in preparation and low in efficiency. The pressure-assisted self-propagating titania-alumina carbon block material is made of titanium powder, aluminum powder and carbon black powder. The preparation method comprises the following: a step of mixing the titanium powder, aluminum powder and carbon black powder according to a ratio of the mass percentage of the titanium powder to the mass percentage of the aluminum powder to the mass percentage of carbon black powder of 70.7:20.5:8.8; a step of the ball milling of the mixture; a step of drying and sieving; a step of performing a green body; a step of igniting an ignitor with resistance wire to excite the self-propagating high -temperature synthesis reaction of the green body and the combustion took about 5 to 10s; a step of keeping the self- propagating high -temperature synthetic product under the pressure of between 150 and 300 MPa for10 to 20s; a step of cooling down the product from the self- propagating reaction to room temperature. The method has the advantages of short reaction time, high production efficiency, high purity for the product and being suitable for mass production.

Description

technical field [0001] The invention relates to a titanium-aluminum-carbon block material and a preparation method thereof. Background technique [0002] Ti 3 AlC 2 It is a new type of ternary layered compound. It not only has many advantages of ceramic materials, such as high melting point, high modulus (Young's modulus 297GPa, shear modulus 124GPa), high strength, etc.; it also has some characteristics of metal materials, such as high conductivity (room temperature conductivity 2.9×10 9 S.m -1 ), high thermal conductivity, strong resistance to damage and machinability, etc. In addition, it also has good self-lubricating properties, and its self-lubricating properties are better than graphite and MoS 2 . Therefore Ti 3 AlC 2 It has very broad application prospects in the fields of aerospace, nuclear industry, high-temperature structural components, electrode brushes, and commutator segments. Although currently prepared Ti 3 AlC 2 There are many methods, among wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/56C04B35/65C22C29/06C22C1/05
Inventor 赫晓东朱春城钱旭坤史丽萍
Owner HARBIN INST OF TECH