Method for preparing titanium carbide nanometer particles and composite materials thereof by direct current arc method

A DC arc method and nanoparticle technology, applied in the direction of titanium carbide, carbide, etc., can solve the problems of low output, long reaction time, quality limitation, etc., and achieve the effect of high product purity and uniform particle size distribution.

Inactive Publication Date: 2012-08-01
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] The main preparation methods of titanium carbide are: carbothermal reduction method, that is, carbon black or carbon-containing organic matter and TiO 2 The powder is reacted at a high temperature exceeding 1500 ° C. The reaction time is long, and the particle size distribution of the obtained product is wide, which requires further processing. This method was used in the initial industrial production; the direct carbonization method, that is, the use of titanium powder and graphite powder Direct reaction, including high-te

Method used

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  • Method for preparing titanium carbide nanometer particles and composite materials thereof by direct current arc method
  • Method for preparing titanium carbide nanometer particles and composite materials thereof by direct current arc method
  • Method for preparing titanium carbide nanometer particles and composite materials thereof by direct current arc method

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Embodiment 1

[0024] Take micron-sized titanium powder (purity 99.7%), press it into a block under a pressure of 25MPa as the anode, and graphite rod as the cathode, and adjust the distance between the two electrodes to about 30mm. Vacuum the reaction chamber to about 10 -2 Pa, filled with methane and hydrogen at a ratio of 1:3 to reach 1x10 4 Pa and 3x10 4 Pa. Turn on the cooling water system, turn on the power and start the arc, adjust the current and the distance between the two electrodes and stabilize the arc, evaporate the bulk target, form atomic clusters and gather them into nanoparticles and deposit them on the wall of the reaction chamber, and collect the powder through passivation process.

[0025] The SEM image of the titanium carbide nanoparticles obtained in embodiment one is as follows figure 1 As shown, it shows that the particle distribution is uniform;

[0026] The obtained titanium carbide nanoparticle XRD collection of patterns of embodiment one is as follows figur...

Embodiment 2

[0028] The implementation steps are basically the same as in Example 1, except that the type and ratio of the mixed atmosphere are different, and 1:2 methane and argon are charged to reach 1×10 respectively. 4 Pa and argon.

[0029] The XRD pattern of the titanium carbide nanocomposite particles obtained in Example 2 is shown in Figure 4, which indicates that there is also a graphite phase in the product besides the titanium carbide phase, forming a nanocomposite structure of carbon-coated titanium carbide.

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Abstract

A method for preparing titanium carbide nanometer particles and composite materials thereof by a direct current arc method belongs to the field of nanometer material preparation technology and application. The method is characterized by including steps of using automatically controlled direct-current arc plasma equipment; utilizing a bulk metal titanium raw material as an anode and a graphite bar as a cathode; leading in mixed gases including carbonic reaction gas, inert gas and active gas which are in certain proportion; and obtaining the titanium carbide nanometer particles and the composite materials thereof after evaporating the bulk metal raw material. The method has the advantages that a preparation process is simple, the kind of nanometer powder materials can be produced on a large scale, size distribution is uniform, purity is high, and accordingly the method can be applied to the fields of electrochemical electrodes and wear-resistant coating materials.

Description

technical field [0001] The invention belongs to the technical field of nanometer material preparation. It is a process for preparing titanium carbide nanoparticles and its composite materials by using DC arc plasma evaporation method. Background technique [0002] Titanium carbide ceramic powder has many excellent properties, such as high melting point, high hardness, wear resistance, corrosion and oxidation resistance, high electrical conductivity and thermal conductivity, etc. It is mainly used in tool materials, aerospace materials, electrode materials, etc. [0003] The main preparation methods of titanium carbide are: carbothermal reduction method, that is, carbon black or carbon-containing organic matter and TiO 2 The powder is reacted at a high temperature exceeding 1500 ° C. The reaction time is long, and the particle size distribution of the obtained product is wide, which requires further processing. This method was used in the initial industrial production; the d...

Claims

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Application Information

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IPC IPC(8): C01B31/30B22F9/14C01B32/921
Inventor 董星龙于瀛秀黄昊薛方红全燮
Owner DALIAN UNIV OF TECH
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