High-purity Ti2AlC powder material and preparing method thereof

Inactive Publication Date: 2007-09-19
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: to obtain high-purity Ti 2 AlC powder must be made into bulk materials by hot pressing or hot isostatic pressing, and then ground to remove impurities. Not only is the cost high, the process is complicated, and it is difficult to industrialize large-scale production, which greatly restricts the application of this material.

Method used

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  • High-purity Ti2AlC powder material and preparing method thereof

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preparation example Construction

[0017] The preparation of the above-mentioned high-purity Ti provided by the present invention 2 The method for AlC powder material, concrete steps comprise:

[0018] (1) weighing: take Ti powder, TiC powder, Al powder and active carbon powder, the mol ratio of four kinds of raw materials is n(Ti):n(TiC):n(Al):n(C)=(1.15 ~1.95):(0.5~0.95):1:(0.15~0.95);

[0019] (2) mix the raw material powder that takes by weighing;

[0020] (3) Sintering: After pressing the uniformly mixed raw material powder into tablets, place it in the cavity of a microwave sintering device, and sinter in an argon-protected environment, and cool naturally after sintering.

Embodiment 1

[0022] Embodiment 1: Raw material powder is mixed with n(Ti):n(TiC):n(Al):n(C)=1.25:0.85:1:0.2 in molar ratio; mix evenly, put into microwave sintering system after tableting , and sintered under the protection of argon. The frequency used is 2.45GHz, the power is controlled at 0.8KW, the temperature is 850°C, and the temperature is kept for 5 minutes. After the grinding of the obtained material, measure its phase composition, the result shows: the product only has Ti 2 Two components of AlC and TiC, Ti 2 The AlC content is 93.5%.

Embodiment 2

[0023] Embodiment 2: The molar ratio of raw material powder is n(Ti):n(TiC):n(Al):n(C)=1.15:0.95:1:0.15 ingredients; mix evenly, put into microwave sintering system after tabletting , and sintered under the protection of argon. The frequency used is 2.45GHz, the power is controlled at 0.5KW, the temperature is 800°C, and the temperature is kept for 10 minutes. After the grinding of the obtained material, measure its phase composition, the result shows: the product only has Ti 2 Two components of AlC and TiC, Ti 2 The AlC content is 93.5%.

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Abstract

The present invention discloses a high pure Ti2AlC powder material and a preparation method of the same. The powder material comprises Ti powder, TiC powder, Al powder and active carbon powder, wherein the mol ratio of which is n(Ti):n(TiC):n(Al):n(C)=(1.15~1.95):(0.5~0.95):1:(0.15~0.95). The preparation method comprises the steps of: feed weighing according to compounding ratio; mixing the raw material powder evenly; tabletting the mixed raw material and putting into the chamber of the microwave sintering device, and sintering in the presence of argon gas; obtaining the powder material after natural cooling. The powder material of the present invention has high purity and small crystal grain. The preparation process has simple raw material, adequately uses the characteristics of microwave sintering technology and the advantages of self-propagating reaction, and has a short synthesis time; besides the Ti2AlC powder material has a high purity, is adapted to industrial production. The application of the material is greatly improved.

Description

technical field [0001] The invention relates to new structural materials, in particular to the preparation of high-purity Ti by microwave technology 2 AlC powder material method. Background technique [0002] In recent years, the research of new high-performance materials has become a hot spot and focus of scholars at home and abroad. Recently, a class of ternary carbides and nitrides with a layered structure has received extensive attention from material scientists. They not only have the properties of metals, but also have good thermal and electrical conductivity at room temperature, and have low Vickers microhardness and high elastic modulus and shear modulus, can be machined like metal, and has plasticity at higher temperature, but also has the performance of ceramics, high yield strength, high melting point , high thermal stability and good oxidation resistance. These compounds can be represented by the unified molecular formula M n+1 AX n , where M is a transition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/30C04B35/56C22C29/10C22C1/05
Inventor 周卫兵梅炳初朱教群
Owner WUHAN UNIV OF TECH
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