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Method for preparing Ti2AlC ceramic material

A ceramic material, dry ball milling technology, applied in the field of ceramic material manufacturing, can solve the problems of inability to large-scale industrial production, many impurities, difficult to control purity, etc., to achieve low cost, low firing temperature, uniform and dense material structure. Effect

Inactive Publication Date: 2007-05-09
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the purity of this method is difficult to control, and there are many impurities, including reactant residues and intermediate products, as well as Ti 3 AlC 2 Physical phase, unable to be mass-produced

Method used

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  • Method for preparing Ti2AlC ceramic material
  • Method for preparing Ti2AlC ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1, at first 71.11% Ti, 20.00% Al and 8.89% C are made mixture by mass percentage; Add the sodium stearate dispersant of mixture quality 0.2% in the mixture, adopt dry ball milling to be 730 with rotating speed A planetary ball mill that rotates per minute, the mass ratio of the material to the ball is 1:10, and the ball milling time is 6 hours to make it mechanically alloyed to form TiAl, TiC and a small amount of titanium and aluminum fine powder; the powder after ball milling The body was vacuum-dried at 70°C for 5 hours; the dried powder was put into a graphite grinding tool, and hot-pressed and sintered at 1300°C and 10MPa pressure for 1 hour under argon gas.

Embodiment 2

[0011] Embodiment 2, at first 71.11% Ti, 20.00% Al and 8.89% C are made mixture by mass percentage; Add the sodium stearate dispersant of mixture quality 0.4% in the mixture, adopt dry method ball milling to be 700 with rotating speed A planetary ball mill that rotates per minute, the ratio of material to mass is 1:10, and the ball milling time is 7 hours, so that it is mechanically alloyed to form TiAl, TiC and a small amount of titanium and aluminum fine powder; the ball milled The powder was dried in vacuum at 76°C for 4.5 hours; the dried powder was put into a graphite grinding tool, and then hot-pressed and sintered at 1270°C and 20MPa pressure for 2 hours under vacuum conditions.

Embodiment 3

[0012] Embodiment 3, at first 71.11% Ti, 20.00% Al and 8.89% C are made mixture by mass percentage; Add the sodium stearate dispersant of mixture quality 0.3% in the mixture, adopt dry ball milling to be 760 with rotating speed A planetary ball mill that rotates per minute, the mass ratio of the material to the ball is 1:10, and the ball milling time is 8 hours to make it mechanically alloyed to form TiAl, TiC and a small amount of titanium and aluminum fine powder; the powder after ball milling The body was vacuum-dried at 72°C for 4.2 hours; the dried powder was put into a graphite grinding tool, and hot-pressed and sintered at 1220°C and 26MPa pressure for 1.4 hours under argon gas.

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Abstract

This invention discloses a method for preparing Ti2AlC ceramic material. The method comprises: (1) preparing a mixture of Ti, Al and C, adding sodium stearate dispersant into the mixture, performing dry ball-milling for mechanically alloying and obtained fine powder of TiAl, TiC, and minor Ti and Al, and vacuum-drying; (2) loading the dried powder into a graphite mold, and hot-pressing sintering in Ar or vacuum. After ball-milled, Ti, Al and C powder can perform in situ reaction to form TiC intermediate phase, which is then hot-pressing sintered to form processable ceramic material with Ti2AlC as the major crystalline. The method has such advantages as simple process and low sintering temperature. The prepared Ti2AlC ceramic material is uniform and compact.

Description

technical field [0001] The invention belongs to the field of ceramic material manufacturing, in particular to a Ti 2 Preparation method of AlC ceramic material. Background technique [0002] Titanium Aluminum Carbon (Ti 2 AlC) is a new type of ceramic material with unique properties. The performance of this material combines the advantages of metal materials and ceramic materials, such as electrical conductivity, thermal conductivity, machinability, high temperature resistance, thermal shock resistance, and self-lubricating very unique comprehensive properties. Materials and machinable materials and other fields have broad application prospects. [0003] At present, there are two main preparation methods of this material, in-situ hot pressing sintering and hot isostatic pressing sintering. These two methods use Ti, Al, and C as raw materials to directly prepare titanium-aluminum-carbon bulk materials by reaction sintering. However, the purity of this method is difficult...

Claims

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Application Information

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IPC IPC(8): C04B35/56C04B35/622C04B35/65
Inventor 朱建锋王芬罗宏杰杨海波陈平
Owner SHAANXI UNIV OF SCI & TECH
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