Preparation method for synthetizing zirconium carbide nanometer powder by solid-phase reaction

A nano-powder and zirconium carbide technology is applied in the field of preparation of ultra-fine zirconium carbide nano-powder materials to achieve the effects of high degree of nanometerization, uniform distribution and high product purity

Inactive Publication Date: 2014-12-24
TONGREN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects and deficiencies of the traditional technology for preparing zirconium carbide powder, and provide a new and simple method for preparing zirconium carbide nanoparticles, which uses the chemical thermal explosion method in the combustion synthesis technology to directly prepare nano-sized zirconium carbide Powder, which effectively solves the technical defects in the production of existing nano-zirconium carbide powder materials, thus forming a zirconium carbide nano-powder material with simple process, energy saving and high efficiency, high product purity, high degree of nanometerization and uniform distribution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Implementation Example 1: 30wt% Al-Zr-C

[0020] The ternary mixed powder of 30wt% Al-Zr-C was thoroughly mixed by ball milling and pressed into a cylindrical prefabricated compact with a diameter of 20×15mm and a relative density of 65±3%, and then the compact was placed in an induction chamber filled with Ar gas. In the water-cooled induction coil in the furnace, the SIT high-frequency induction power supply provides energy to ignite the overall reaction of the agglomerate. After being energized and heated for a few seconds, the overall agglomerate undergoes a violent exothermic combustion reaction. The entire reaction is completed quickly in an instant, and the product is Loose and expanded layered structure. The identification results of XRD test show that the thermal detonation synthesis product is composed of Al and ZrC. The observation result of FE-SEM shows that the average particle size of the synthesized ZrC particles is 80-150nm.

Embodiment 2

[0021] Implementation example 2: 10wt% ZrC-10wt% Al-Zr-C

[0022] The quaternary mixed powder of 10wt% ZrC-10wt% Al-Zr-C is fully mixed by ball milling and then pressed into a cylindrical prefabricated block with a diameter of 20×15mm and a relative density of 65±3%. React self-made powder with a particle size of about 20 μm, place the compact in a water-cooled induction coil in an induction furnace filled with Ar gas, provide energy through the SIT high-frequency induction power supply to ignite the overall reaction of the compact, and heat for a few seconds after power on Afterwards, the whole block undergoes a violent exothermic combustion reaction, and the whole reaction is completed in an instant, and the product is in a loose and expanded layered structure. The identification results of XRD test show that the thermal detonation synthesis product is composed of Al and ZrC. FE-SEM observation results show that the average particle size of the synthesized ZrC particles is ...

Embodiment 3

[0023] Implementation Example 3: 10wt% Zn-20wt% Al-Zr-C

[0024] The quaternary mixed powder of 10wt% Zn-20wt% Al-Zr-C is fully mixed by ball milling and then pressed into a cylindrical prefabricated block with a diameter of 20×15mm and a relative density of 65±3%. The ZrC powder is the original thermal explosion React self-made powder with a particle size of about 20 μm, place the compact in a water-cooled induction coil in an induction furnace filled with Ar gas, provide energy through the SIT high-frequency induction power supply to ignite the overall reaction of the compact, and heat for a few seconds after power on Afterwards, the whole block undergoes a violent exothermic combustion reaction, and the whole reaction is completed in an instant, and the product is in a loose and expanded layered structure. The identification results of XRD test show that the thermal detonation synthesis product is composed of Al and ZrC. Due to the high reaction temperature, the Zn phase i...

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Abstract

The invention discloses a preparation method for synthetizing zirconium carbide nanometer powder by solid-phase reaction. According to the preparation method, Zr (zirconium) powder and carbon black powder are basic materials, a certain Al (aluminum) powder or Zn (zinc) powder or prepared ZrC (zirconium carbide) powder is added to serve as a booster to control reaction temperature, the molar ratio of Zr (zirconium) to C (carbon) of the basic materials is 1, and the additive amount of the Al powder is 30wt% when mixed powder of Al, Zr and C is used; when mixed powder of Al, Zn, Zr and C is used, the additive amount of the Al powder is 20wt%, and the additive amount of the Zn powder is 10wt%; when mixed powder of ZrC, Al, Zr and C is used, both the content of the ZrC powder and the content of the Al powder are 10wt%. The preparation method has the advantages of quick reaction, simple technology, good energy-saving effect, high efficiency, high product purity, high nanocrystallization level and the like.

Description

technical field [0001] The invention belongs to the technical field of new transition metal carbide ceramic powder materials, in particular to a preparation method of ultrafine zirconium carbide nano powder materials. Background technique [0002] As we all know, zirconium carbide (ZrC) is widely used in cutting tools, wear-resistant drill bits, electronic Components, protective layers in atomic reactors, etc. As a strengthening phase, ZrC is more used as reinforcing particles in metal matrix composites. ZrC has a typical face-centered cubic structure with comprehensive composite properties of metal bonds, ionic bonds and covalent bonds. At the same time, ZrC also has a great reaction heat of formation, and it can be synthesized or prepared by carbothermal reduction reaction, magnesothermic reduction reaction, mechanical alloying, chemical vapor deposition, and sol-gel at high temperature. However, these methods either require high temperature and high heat, and the proce...

Claims

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Application Information

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IPC IPC(8): B22F9/16
Inventor 宋谋胜龙禹冉茂武张杰田昌海
Owner TONGREN UNIV
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