Method for preparing titanium carbide ceramic micro powder by utilizing self-propagating high temperature synthesis

A self-propagating high-temperature, ceramic micropowder technology, which is applied in the field of preparing titanium carbide micropowder ceramic materials, can solve the problems of TiC particles such as coarse particles, complex preparation process and equipment, and uneven particles, and achieve high product yield and quality, low cost, and production The effect of simple process

Inactive Publication Date: 2010-05-12
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that the preparation process and equipment are more complicated, and the obtained TiC particles are coarse and uneven.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: With Ti powder and C powder that particle size is 150 orders, and purity is 99.9% as raw materials, Ti powder and C powder are uniformly mixed in a ratio of 1:1 (mole), and the ball-to-material ratio is 20 : 1 steel ball and mixed powder are put into high-energy ball mill ball mill jar in the glove box that is full of argon gas, make ball material mixture account for 15% of ball mill jar inner cavity volume, carry out with the rotating speed of 1000 rev / mins at room temperature then High-energy ball milling for 3 hours; the mixed powder after ball milling was cold-pressed into a cylindrical blank of Φ30mm×30mm; subsequently, the compact was ignited with an electric arc in a vacuum chamber to obtain the combustion product; finally, the combustion product was crushed to obtain TiC micropowder ceramic material, the average particle size of the powder was The diameter is about 7.5 μm.

Embodiment 2

[0010] Embodiment 2: With Ti powder and C powder that particle size is 200 orders, and purity is 99.9% as raw materials, Ti powder and C powder are uniformly mixed in a ratio of 1:1 (mole), and the ball-to-material ratio is 40 : 1 steel ball and mixed powder are put into high-energy ball mill ball mill jar in the glove box that is full of argon gas, make ball material mixture account for 25% of ball mill jar inner chamber volume, carry out at room temperature with the rotating speed of 1500 rev / min then High-energy ball milling for 6 hours; then, the mixed powder after ball milling was cold-pressed into a cylindrical blank of Φ30mm×30mm; then, the compact was ignited with an arc in a vacuum chamber to obtain the combustion product; finally, the combustion product was crushed to obtain TiC micropowder ceramic material, powder The average particle size is about 4.5 μm.

Embodiment 3

[0011] Embodiment 3: Be 200 orders with particle size, the Ti powder that purity is 99.9% and C powder are raw materials, Ti powder and C powder are uniformly mixed in the ratio of 1: 1 (mole), and the ball material ratio is 80: The steel balls and mixed powder of 1 were put into the ball milling tank of the high-energy ball mill in a glove box filled with argon gas, so that the ball material mixture accounted for 35% of the inner cavity volume of the ball milling tank, and then high-energy ball milling was carried out at room temperature at a speed of 2000 rpm. Ball milling for 9 hours; then, the mixed powder after ball milling was cold-pressed into a cylindrical blank of Φ30mm×30mm; then, the compact was ignited with an arc to obtain the combustion product; finally, the combustion product was crushed to obtain a TiC micropowder ceramic material with an average particle size of about is 2.5 μm.

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Abstract

The invention discloses a method for preparing a titanium carbide micro powder ceramic material by utilizing self-propagating high temperature synthesis. Ti powder and C powder with the granularity being less than 100 meshes and the purity being more than 99% are taken as raw materials. The method comprises the following steps: evenly mixing the Ti powder and the C powder according to the mole ratio of 1:1; carrying out high energy ball mill for 3-10h at room temperature in the revolving speed of 1000-2000r / min; performing cold press molding on the mixed powder after ball mill; igniting and compacting green in a vacuum chamber |by an electric arc to obtain a combustion product; and finally cracking the combustion product to obtain the TiC micro powder ceramic material, wherein the average grain diameter of the power is 2-8mu m. The method of the invention takes pure Ti powder and pure C powder as raw materials, adopts ball mill and self-propagating high temperature synthesis to prepare TiC micro powder ceramic material, and has the advantages of simple production process, low cost, high product yield and quality and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of new ceramic powder materials, and provides a method for preparing titanium carbide micropowder ceramic materials by using pure Ti powder and C powder as raw materials and adopting a self-propagating high-temperature synthesis method. Background technique [0002] The molecular formula of titanium carbide is TiC, which is an interstitial compound with FCC structure formed by C atoms filling the gaps of α-Ti close-packed hexagonal octahedrons. It is a new type of ceramic material. Titanium carbide powder has high hardness (HV=30GPa), high melting point ( 3160℃), high elastic modulus (350GPa), low thermal conductivity (21W / (m k)), good chemical stability, low resistivity (60μΩ cm (room temperature)), wear resistance, corrosion resistance and many other advantages , Widely used in many fields such as the manufacture of wear-resistant materials, cutting tools, abrasives, molds and melting metal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/626C04B35/56C04B35/64
Inventor 李才巨朱心昆赵昆渝陶静梅陈铁力
Owner KUNMING UNIV OF SCI & TECH
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