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Method of producing composite material of carbon nanometer pipe/ nickel/ aluminum improving and toughening alumina radicel

A carbon nanotube and composite material technology, which is applied in the field of in-situ synthesis of carbon nanotube/nickel/aluminum reinforced and toughened alumina-based composite materials, can solve the problem that the two-phase composition cannot be uniformly dispersed and the nanoparticles cannot be completely destroyed. problems such as inter-reunion, to achieve the effect of improving comprehensive performance and high strength

Inactive Publication Date: 2008-12-17
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this method is simple, but the disadvantage is that ball milling itself cannot completely destroy the agglomeration of nanoparticles, and cannot achieve uniform dispersion of the two-phase composition.

Method used

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  • Method of producing composite material of carbon nanometer pipe/ nickel/ aluminum improving and toughening alumina radicel

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Add 2.49 grams of nickel nitrate hexahydrate and 19.6 grams of aluminum powder into deionized water, then add 0.1 mol / L sodium hydroxide solution dropwise to the above solution until the pH value of the solution is is 7, the mass ratio of Ni element to Al element produced by the reaction is 0.025:1, Al and Al(OH) 3 Ni(OH) with a mass ratio of 0.01:1 2 / Al / Al(OH) 3 Ternary colloid, and then the prepared ternary colloid was dehydrated at 240°C and 350mL / min nitrogen atmosphere for 2 hours, calcined at 350°C for 2 hours, and the heating rate of the furnace was 8°C / min, thereby obtaining NiO / Al / Al 2 o 3 Catalyst precursor; take the resulting NiO / Al / Al 2 o 3 Lay it in a quartz boat, place the quartz boat in the constant temperature zone in the middle of the quartz reaction tube, first pass nitrogen into the reaction tube to remove the air, raise the temperature to 600 °C at a rate of 8 °C / min, then pass in h 2 gas for 2 hours, NiO / Al / Al 2 o 3 Reduction to Ni / Al / Al 2...

example 2

[0018]Concrete method and step are the same as example 1, and different conditions are: the time of gas phase deposition of carbon nanotubes is 1 hour, and finally obtaining carbon nanotubes / Ni / Al / Al with a mass content of carbon nanotubes of 5% 2 o 3 Composite powder.

example 3

[0020] Concrete method and step are the same as example 1, and different conditions are: 1.25 grams of nickel nitrate hexahydrate and 19.8 aluminum powder are added to deionized water to obtain Ni: Al: Al 2 o 3 =1:9:90, the carbon nanotube / Ni / Al / Al that finally obtains the carbon nanotube mass content is 1.% 2 o 3 Composite powder.

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Abstract

The process of preparing alumina-base composite material includes the following steps: dropping sodium hydroxide solution or ammonia water to solution with nickel nitrate hexahydrate and aluminum powder for reaction to produce Ni(OH)2 / Al / Al(OH)3, dewatering and calcining the obtain ternary colloid to obtain NiO / Al / Al2O3, reducing the obtained NiO / Al / Al2O3 into Ni / Al / Al2O3, introducing mixed methane and nitrogen gas after stopping hydrogen introduction and reacting catalytically at certain temperature for several hours to obtain carbon nanotube / Ni / Al / Al2O3 composite powder with controllable carbon nanotube content, and final powder metallurgy and hot extruding to obtain carbon nanotube / Ni / Al / Al2O3 composite material. The present invention has the advantages of well controlled proportion of Ni, Al and Al2O3, excellent dispersion of Al and carbon nanotube in the composite material, high comprehensive performance of the composite material, etc.

Description

technical field [0001] The invention relates to a method for preparing an in-situ synthesized carbon nanotube / nickel / aluminum reinforced and toughened alumina-based composite material, which belongs to the preparation technology of the alumina-based composite material. Background technique [0002] Ceramic materials have the advantages of high strength, high hardness, high temperature resistance, oxidation resistance, good wear resistance at high temperatures, and excellent chemical corrosion resistance. These excellent properties are not available in commonly used metal materials and polymer materials. Therefore, the more are getting more and more attention. However, due to the weakness of the brittleness of the ceramic material itself, it lacks sufficient reliability when used as a structural material. Therefore, improving the brittleness of ceramic materials has become one of the urgent problems to be solved in the field of ceramic materials. [0003] Pure aluminum and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/26B22F3/16C04B35/71C04B35/10
Inventor 赵乃勤何春年师春生杜希文李家俊
Owner TIANJIN UNIV