Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method for nano- zirconium carbide material

A nano-zirconium carbide and raw material technology, applied in the field of composite materials, can solve the problems of complex process, oxygen pollution, coarse ZrC particles (above 10 μm and so on)

Inactive Publication Date: 2009-02-18
SHANGHAI JIAO TONG UNIV
View PDF0 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

ZrC is usually prepared by carbothermal reduction reaction at high temperature, mechanical alloying, chemical vapor deposition (CVD) and other methods, and can also be prepared by combustion synthesis method with simple process and energy saving, but usually the combustion synthesis of Zr and C obtained ZrC particles are relatively coarse (above 10 μm)), and it is difficult to effectively prepare nano-ZrC materials by other commonly used processes
[0003] Found through literature retrieval to prior art, " Synthesis of nanosizedzirconium carbide by a sol-gel route " (Mickael Doll'e) published on " Journal of the European Ceramic Society " 27 (2007) 2061-2067 by Mickael Doll'e etc. etc., "Using sol-gel method to synthesize nano-zirconium carbide", European Journal of Ceramics, 2007, 27 volumes, 2061-2067 pages) article, which proposes to utilize sol-gel method to synthesize nano-zirconium carbide, starting raw material is Zr (OPr )4, AcOH and sucrose, obtained zirconium carbide particles with an average particle size of about 100 nanometers through complex sol-gel treatment process and high-temperature heat treatment, but the oxygen pollution in the product is serious, and the process is very complicated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The 10wt% Cu-Zr-C ternary mixed powder was fully mixed and pressed into a cylindrical compact with a diameter of 22×10mm and a relative density of about 60±5%, and then placed in a glove box filled with Ar. The tungsten arc at the bottom of the sample is ignited. After the tungsten arc is heated for a few seconds, Cu begins to melt (temperature reaches about 1100 ° C), followed by a violent exothermic combustion reaction (temperature up to 2450 ° C), and the combustion wave propagates spontaneously until The entire reaction is complete. The results of X-ray diffraction test show that the combustion synthesis product is composed of Cu and ZrC. The result of field emission scanning electron microscope observation shows that the average particle size of ZrC is about 100nm.

Embodiment 2

[0021] After fully mixing 20wt% Cu-Zr-C ternary mixed powder, press it into a cylindrical compact with a diameter of 22×10mm and a relative density of about 60±5%, and then place it in a glove box filled with Ar. The tungsten arc at the bottom of the sample is ignited. After the tungsten arc is heated for a few seconds, Cu begins to melt, followed by a violent exothermic combustion reaction (temperature as high as 2430 ° C), and the combustion wave propagates spontaneously until the entire reaction is completed. The results of X-ray diffraction test show that the combustion synthesis product is composed of two phases of Cu and ZrC. The result of field emission scanning electron microscope observation shows that the average particle size of ZrC is about 70nm.

Embodiment 3

[0023] The 30wt% Cu-Zr-C ternary mixed powder was fully mixed and pressed into a cylindrical compact with a diameter of 22×10mm and a relative density of about 60±5%, and then placed in a glove box filled with Ar. The tungsten arc at the bottom of the sample is ignited. After the tungsten arc is heated for about 12 seconds, Cu begins to melt, followed by a violent exothermic combustion reaction (temperature as high as 2400 ° C), and the combustion wave propagates spontaneously until the entire reaction is completed. The results of X-ray diffraction test show that the combustion synthesis product is composed of two phases of Cu and ZrC. The result of field emission scanning electron microscope observation shows that the average particle size of ZrC is about 50nm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of the composite material, and discloses a method for preparing the nanometer zirconium carbide material; Copper powder or aluminum power, the zinc powder and the carbon soot are adopted as the raw materials; the atomic ratio of the zinc and carbon is 1; in the mixed powder of the copper, zinc and carbon, the content of the copper powder is 10 to 30 percent at wt; in the mixed powder of the aluminum powder, the zinc powder and the carbon soot, the content of the aluminum powder is 30 to 40 percent at wt; after the copper or aluminum powder, zinc powder and carbon soot are adequately mixed, the mixture is compressed to a briquet; in the environment that is full of inert gases, the briquet is combusted and synthesized; tungsten arc on the bottom of the briquet is adopted for ignition; after the briquet is ignited, the combustion wave is spontaneously spread until the entire reaction is completed, so that the nanometer carbon zinc that is mixed with copper or aluminum is obtained. The invention has the advantages of simple craftwork, energy conservation, high efficiency, high purity of the quality, and the like; the product is the composite material of copper or aluminum, so that the product not only can be used as Cu-nanometer ZrC composite material or Al-nanometer ZrC composite material, but also can obtain the pure nanometer carbon zinc particles adopting the acid to wash the metal copper or aluminum.

Description

technical field [0001] The invention relates to a preparation method in the technical field of composite materials, in particular to a preparation method of a nano zirconium carbide material. Background technique [0002] Zirconium carbide (ZrC) has a very high melting point and hardness, excellent wear resistance and corrosion resistance, and good chemical stability, and is widely used in cutting tools, wear-resistant drill bits, electronic components, protective layers and composites in atomic reactors Reinforcing particles in the material. The nanoscale ZrC grain size can greatly improve the mechanical properties of the material. ZrC is usually prepared by carbothermal reduction reaction at high temperature, mechanical alloying, chemical vapor deposition (CVD) and other methods, and can also be prepared by combustion synthesis method with simple process and energy saving, but usually the combustion synthesis of Zr and C ZrC particles are relatively coarse (above 10 μm))...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/30
Inventor 黄斌李建国张梦贤宋谋胜
Owner SHANGHAI JIAO TONG UNIV