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Method of preparing high purity Ti2AlC block material

A bulk material, high-purity technology, applied in the field of preparation of Ti2AlC bulk materials, can solve the problems of difficult to prepare materials with a diameter greater than 100mm, poor mechanical properties of AlC bulk materials, long reaction time, etc., to achieve good comprehensive mechanics The effect of performance, fine grain size and high production efficiency

Inactive Publication Date: 2010-06-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is in order to solve existing preparation Ti 2 The method of AlC bulk material has the disadvantages of high reaction temperature, long reaction time, complex process, difficulty in making materials with a diameter greater than 100mm, and the prepared Ti 2 The problem of poor mechanical properties of AlC bulk materials, and to provide a way to prepare high-purity Ti 2 AlC bulk material approach

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0008] Specific embodiment one: this embodiment prepares high-purity Ti 2 The method of AlC bulk material is carried out as follows: 1. Mix 2.5-3.3 moles of titanium powder, 1.5-2.3 moles of aluminum powder and 0.8-1.2 moles of carbon powder according to the molar ratio, and then add absolute ethanol to wet mix 5 ~30 hours, dry naturally; 2. Put the mixed material into a steel mold and apply a pressure of 15~45MPa for 10~15s. At this time, the material forms a cylindrical green body, and a sand cake is placed on the green body , Place a steel block with a thickness of 30mm on the sand cake, and the lead wire of the resistance wire is drawn from the edge of the block and connected to the ignition device; 3. Turn on the ignition device to ignite and make the resistance wire energize and generate heat. Apply an axial pressure of 2000kN to 5000kN for 5 to 60 seconds, take out the product, embed it in quartz sand within 30 seconds and cool it for 20 to 30 hours to obtain Ti 2 AlC ...

specific Embodiment approach 2

[0011] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, 2.8-3.0 moles of titanium powder, 1.8-2.0 moles of aluminum powder and 0.9-1.1 moles of carbon powder are mixed according to the molar ratio. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0012] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in step 1, 2.9 moles of titanium powder, 1.9 moles of aluminum powder and 1.0 moles of carbon powder are mixed according to the molar ratio. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

A method for preparing Ti2AlC bulk material with high purity relates to a preparation method of Ti2AlC bulk material. The invention solves problems of high reaction temperature, long reaction time, complex technique, being difficult to prepare material with diameter more than 100mm in the existing method for preparing Ti2AlC bulk material and poor mechanical properties of the Ti2AlC bulk materialobtained by the existing method. The method for prepare the Ti2AlC bulk material with high purity of the invention has the steps: 1. mixing; 2. pressurizing; 3. firing, pressurizing and cooling, thereby obtaining the Ti2AlC bulk material. The method provided by the invention to prepare the Ti2AlC bulk material with high purity has low reaction temperature and short reaction time and the obtained diameter of the Ti2AlC bulk material with high purity is 150-240mm.

Description

technical field [0001] The present invention relates to a kind of Ti 2 Preparation method of AlC bulk material. Background technique [0002] Ti 2 AlC is a new type of ternary layered compound. It not only has many advantages of ceramics, such as high modulus (Young's modulus 277.6GPa, shear modulus 118.8GPa), high strength, etc., but also has some properties of metals, such as low hardness, machinability, good conductivity Thermal conductivity, high damage tolerance. Ti 2 AlC has a very low density (theoretical density 4.11g / cm 2 ) and excellent oxidation resistance, so it can be used as a high temperature structural material. Ti 2 As a new structure / function integrated material, AlC has a wide application space in the fields of aviation, aerospace, electronics industry and nuclear industry. Although Ti 2 AlC has many excellent comprehensive properties and broad application prospects, but Ti 2 The preparation of AlC is extremely difficult, which limits its basic r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/30
Inventor 赫晓东朱春城柏跃磊
Owner HARBIN INST OF TECH