Nanocrystalline carbon titanium carbonitride powder containing grain growing inhibitor and preparation thereof

A technology of grain growth and titanium carbonitride, which is applied in the direction of nitrogen and non-metallic compounds, can solve the problems of difficulty in mixing uniformly and particle size matching, and achieve energy saving, narrow particle size distribution range, and short reaction time.

Inactive Publication Date: 2009-06-24
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For the defects existing in the prior art of Ti(C, N)-based cermet materials, the purpose of the present invention is to provide a nano Crystalline titanium carbonitride powder and preparation method ther

Method used

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Examples

Experimental program
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Example Embodiment

[0028] Example 1:

[0029] The nano titanium dioxide, ammonium metavanadate (NH 4 VO 3 ) And glucose as raw materials, in terms of weight percentage, of which 48.89% of nano titanium dioxide, ammonium metavanadate (NH 4 VO 3 ) 0.34%, glucose 50.77%, dissolve the above-mentioned raw materials in deionized water at about 30°C and stir evenly to obtain a suspension, and then the suspension is dehydrated and dried at about 60°C for about 4 hours. Heat treatment at about 100°C for about 4 hours, and then quench it to obtain precursor powder. Place the powder in a carbon tube reduction reactor, and perform carbonization reduction and nitridation reactions at a temperature of about 1000°C in a nitrogen atmosphere. In about 4 hours, a titanium carbonitride powder containing a grain growth inhibitor with an average grain size of less than 100 nm was prepared.

Example Embodiment

[0030] Example 2:

[0031] The nano titanium dioxide, ammonium metavanadate (NH 4 VO 3 ) And sucrose as raw materials, in which titanium dioxide is 49.66%, ammonium metavanadate 1.39%, and sucrose 48.95%. The above raw materials are dissolved in deionized water at about 90°C and stirred evenly to obtain a suspension. Then the suspension was spray-dried at about 380℃ to obtain the precursor powder; finally, the above-mentioned precursor powder was placed in a tube furnace, and under nitrogen atmosphere at a temperature of about 1350℃, the carbonization reduction and nitridation reaction After 2 hours, a titanium carbonitride powder containing a grain growth inhibitor with an average grain size of less than 100 nm was prepared.

Example Embodiment

[0032] Example 3:

[0033] The nano titanium dioxide, ammonium metavanadate (NH 4 VO 3 ) And nano-carbon black as raw materials, in which 70.23% of nano-titania, 0.97% of ammonium metavanadate, and 28.8% of nano-carbon black are calculated by weight percentage. Dissolve the above-mentioned raw materials in distilled water at about 40°C and stir evenly to obtain Then, the suspension was dried at a temperature of about 50°C for about 3 hours, and then heat treated at about 200°C for about 3 hours, and then quenched to obtain a precursor powder; finally, the precursor powder was obtained The powder is placed in an induction furnace and undergoes carbonization reduction and nitridation reactions at a temperature of about 1150°C under an ammonia atmosphere for about 3.5 hours to obtain titanium carbonitride powder containing a grain growth inhibitor with an average grain size of less than 100 nm.

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Abstract

The invention provides a nano-crystal titanium carbonitride powder containing a crystal grain growth inhibitor and a method for preparing the same. The titanium carbonitride powder takes titanium containing base material, reducing agent and vanadium containing ammonium salt as preparation raw materials. The preparation method comprises that: the materials prepared according to the mixing ratio are placed in ball-milling equipment for ball-milling and mixing to prepare precursor powder, or dissolved in deionized water/distilled water to prepare suspension, the suspension is subjected to dewatering, drying, heating and quenching treatments to prepare the precursor powder, or subjected to spray drying to prepare the precursor powder; the prepared precursor powder is placed in a reduction reaction furnace and subjected to a carbonization reduction reaction at a temperature of between 900 and 1,450 DEG C for 0.5 to 4 hours in the atmosphere of nitrogen gas, ammonia gas or nitrogen-ammonia gas. The titanium carbonitride powder has the characteristics of even mixing, fine crystal grain of the powder, low manufacturing cost, simple process, the suitability for industrialized production and the like, and can better meet application requirements in fields such as high-performance titanium carbonitride based cermet materials and products.

Description

technical field [0001] The invention relates to titanium carbonitride (Ti(C, N))-based cermet material technology, more specifically, relates to a titanium carbonitride powder containing a grain growth inhibitor and a preparation method thereof. Background technique [0002] Titanium carbonitride (Ti(C,N))-based cermet materials have good thermal conductivity, electrical conductivity and chemical stability due to their high melting point, high hardness, wear resistance, corrosion resistance, and good oxidation resistance. Therefore, it is widely used in the preparation of cutting tools and various wear-resistant products in the modern manufacturing industry. It is the most successful substitute for tungsten carbide (WC) series cemented carbide, has broad development prospects, and can solve the problem of tungsten resource depletion. [0003] In order to achieve the high performance of Ti(C,N)-based cermet materials and products, the control of their microstructure and the u...

Claims

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Application Information

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IPC IPC(8): C01B21/082C04B35/58
Inventor 刘颖叶金文邓莉涂铭旌
Owner SICHUAN UNIV
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