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Preparation method for Ti3SiC2 ceramic material

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

Inactive Publication Date: 2010-01-13
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 SiC and Ti 5 Si 3 , there is also a TiC phase, which cannot be mass-produced

Method used

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  • Preparation method for Ti3SiC2 ceramic material
  • Preparation method for Ti3SiC2 ceramic material
  • Preparation method for Ti3SiC2 ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, at first, the Ti powder of 66.6%, the Si powder of 20.1% and the C powder of 13.3% are made mixture by mass percentage; Next, add the sodium stearate dispersant of mixture quality 0.5% and 2.698 % Aluminum powder is milled by dry method with a QM-ISP2 planetary ball mill with a rotation speed of 400r / min, the mass ratio of the material to the ball is 1:10, and the ball milling time is 18 hours, so that it can be mechanically alloyed to refine the grains, and at the same time in situ The reaction produces a small amount of SiC, Ti 5 Si 3 For the intermediate phase, before ball milling, first pass argon into the ball milling cylinder to discharge the air in the ball milling cylinder; then, use ethanol solution to wet the powder after ball milling, and then vacuum dry at 55°C for 28 hours; the dried The powder is put into a graphite grinding tool and dry-pressed, and then hot-pressed and sintered at 1200°C and 10MPa under vacuum for 1.5 hours to obtain Ti 3...

Embodiment 2

[0017] Embodiment 2, at first, the Ti powder of 68.5%, the Si powder of 19.5% and the C powder of 12% are made mixture by mass percentage; Secondly, add the sodium stearate dispersant of mixture quality 0.5% and 2.698 % Aluminum powder is milled by dry method with a QM-ISP2 planetary ball mill with a rotation speed of 400r / min, the mass ratio of material to ball is 1:10, and the ball milling time is 20 hours, so that it can be mechanically alloyed to refine the grains, and at the same time in situ The reaction produces a small amount of SiC, Ti 5 Si 3 For the intermediate phase, before ball milling, first pass argon gas into the ball mill cylinder to discharge the air in the ball mill cylinder; then, use ethanol solution to wet the powder after ball milling, and then vacuum dry at 50°C for 30 hours; the dried The powder is put into a graphite grinding tool and dry-pressed, and then hot-pressed and sintered at 1300°C and 15MPa under vacuum for 2 hours to obtain Ti 3 SiC 2 Ce...

Embodiment 3

[0018] Embodiment 3, at first, 68.5% Ti powder, 20.1% Si powder and 11.4% C powder are made into mixture by mass percentage; Secondly, add the sodium stearate dispersant of mixture quality 0.5% and 2.698 % Aluminum powder is milled by dry method with a QM-ISP2 planetary ball mill with a rotation speed of 400r / min, the mass ratio of material to ball is 1:10, and the ball milling time is 22 hours, so that it can be mechanically alloyed to refine the grains, and at the same time in situ The reaction produces a small amount of SiC, Ti 5 Si 3 For the intermediate phase, before the ball milling, argon gas was introduced into the ball milling cylinder to discharge the air in the ball milling cylinder; then, the powder after ball milling was taken by ethanol solution wet method, and then vacuum-dried at 60°C for 25 hours; the dried The powder is put into a graphite grinding tool and dry-pressed to form, and then hot-pressed and sintered at 1250 ° C and 20 MPa pressure for 2 hours und...

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Abstract

The invention relates to a preparation method for a Ti3SiC2 ceramic material, which comprises the following steps of: firstly, preparing Ti, Si and C into mixture, adding sodium stearate dispersing agent and little amount of A1 into the mixture for enhancing sintering, adopting a dry method for ball milling to lead the mixture to be mechanically alloyed to form main phases such as Ti, Si and little amount of SiC as well as Ti5Si3 fine powder, using an alcohol wet method to take materials from the ball-milled powder, and vacuum-drying; putting the dried powder into a graphite grinding tool, and carrying out hot-pressing and sintering under the condition of argon or vacuum. The preparation method uses Ti powder, Si powder, C powder and little amount of additives for high-energy ball milling, fining crystalline grain, simultaneously carrying out in situ reaction to generate little amount of SiC, Ti5Si3 intermediate phase. The compound powder forms a machinable ceramic material with the main phases of Ti3SiC2 after hot-pressed and sintered. The preparation method has simple technique and low firing temperature, and the prepared material has even and compact structure.

Description

technical field [0001] The invention belongs to the field of ceramic material manufacturing, in particular to a Ti 3 SiC 2 Preparation method of ceramic material. Background technique [0002] Titanium silicon carbide (Ti 3 SiC 2 ) 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 many main preparation methods for this material, such as in-situ hot pressing sintering, hot isostatic pressing sintering, spark plasma sintering, solid-state displacement in-situ reaction synthesis, chemical vapor deposition reaction, self-propagating high temperature method, mechanical Allo...

Claims

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Application Information

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IPC IPC(8): C04B35/515C04B35/645
Inventor 王芬刘波波朱建锋杨志波许红娅薛小霜李强
Owner SHAANXI UNIV OF SCI & TECH
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