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Nickel aluminide intermetal compound-carbon nanotube composite material and preparation thereof

A technology of intermetallic compounds and nickel-coated carbon nanotubes, which is applied in the field of nickel-tri-aluminum intermetallic compound-carbon nanotube composite materials and its preparation, nickel-tri-aluminum matrix composite materials and their preparation, to achieve high bending strength and fracture Toughness, improved overall performance, and good corrosion resistance

Inactive Publication Date: 2009-10-07
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of preparing composite materials using carbon nanotubes as reinforcements and nickel-three-aluminum intermetallic compounds as a matrix has not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) In terms of atomic percentage, according to the ratio of Ni:Al=3:1, the analytical pure nickel powder and the analytical pure aluminum powder are batched and mechanically alloyed to obtain Ni 3 Al inner rice powder;

[0030] (2) Taking the total weight as 100%, it is 97% Ni by weight 3 Al nanopowder, and the weight percentage that weighs is 3% nickel-plated carbon nanotube, dry method ball milling mixes 10h;

[0031] (3) Cold pressing the composite powder obtained in step (2) at 20° C. and a pressure of 170 MPa;

[0032] (4) Put the cold-pressed green body into a graphite mold at a temperature of 750°C, a pressure of 20MPa, and a protective gas of N 2 Under the condition of hot pressing and sintering, the nickel-aluminum intermetallic compound-carbon nanotube composite material is obtained.

[0033] Wherein: the above-mentioned nickel-plated carbon nanotubes refer to carbon nanotubes coated with a layer of nickel on the carbon nanotubes, which are prepared with t...

Embodiment 2

[0045] (1) In terms of atomic percentage, according to the ratio of Ni:Al=3:1, the analytical pure nickel powder and the analytical pure aluminum powder are batched and mechanically alloyed to obtain Ni 3 Al nano powder;

[0046] (2) Taking the total weight as 100%, it is 95% Ni by weight 3 Al nano-powder, with 5% nickel-plated carbon nanotubes by weight; first ultrasonically disperse in ethanol for 2 hours, then wet ball milling and mixing for 12 hours, and dry for later use;

[0047] (3) Cold pressing the composite powder obtained in step (2) at 23° C. and a pressure of 190 MPa;

[0048] (4) Put the cold-pressed body into a graphite mold, at a temperature of 850°C, a pressure of 35MPa, and a protective gas of H 2 Under the condition of hot pressing and sintering, the nickel-aluminum intermetallic compound-carbon nanotube composite material is obtained.

[0049] Wherein: the above-mentioned nickel-plated carbon nanotubes refer to carbon nanotubes coated with a layer of nic...

Embodiment 3

[0061] (1) In terms of atomic percentage, according to the ratio of Ni:Al=3:1, the analytical pure nickel powder and the analytical pure aluminum powder are batched and mechanically alloyed to obtain Ni 3 Al nano powder;

[0062] (2) Taking the total weight as 100%, it is 96% Ni by weight 3 Al nano-powder, with 4% nickel-plated multi-walled carbon nanotubes in distilled water by wet ball milling for 24 hours, dried for 24 hours; standby;

[0063] (3) Cold pressing the composite powder obtained in step (2) at 25° C. and a pressure of 180 MPa;

[0064] (4) Put the cold-pressed body into a graphite mold, at a temperature of 950°C, a pressure of 30MPa, and a protective gas of N 2 Under the condition of hot pressing and sintering, the nickel-aluminum intermetallic compound-carbon nanotube composite material is obtained.

[0065] Wherein: the above-mentioned nickel-plated carbon nanotubes refer to carbon nanotubes coated with a layer of nickel on the carbon nanotubes, which are p...

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Abstract

The invention discloses a nickel aluminide intermetal compound-carbon nanotube composite material which comprises, based on the weight percentage, 2 percent to 9 percent of nickel-plated carbon nanotube, and the balance of nickel aluminide intermetal compound. The preparation method of the composite material comprises the following steps: a mechanical alloying method is used for preparing Ni3Al nano powder; a chemical nickel-plating method is used for plating nickel on the surface of the carbon nanotubes; a mechanical ball milling method is used for the synthesis of Ni3Al-carbon nanotube composite powder which is obtained by cold pressing, premolding, hot pressing and sintering. The composite material has higher compressive strength and fracture toughness and good corrosion resistance, thus being applicable to turbine blades of aeroengines and having potential application prospect in the nuclear industry, the catalyst industry, the electronic technology and other fields.

Description

technical field [0001] The invention relates to a nickel-three-aluminum-based composite material and a preparation method thereof, in particular to a nickel-three-aluminum intermetallic compound-carbon nanotube composite material and a preparation method thereof. It belongs to the field of composite material science and nanomaterial science. Background technique [0002] Ni 3 Al-based intermetallic compounds have the advantages of high melting point, low density, good oxidation resistance, and high thermal conductivity, and have become promising high-temperature structural alternative materials. However, poor room temperature plasticity and low high-temperature strength hinder their practical applications. For this reason, many researchers try to solve the problem of molding and application by adding the second phase and suitable technology. In recent years, people have adopted alloying such as adding B alloy elements and preparing Ni with nanostructure 3 Al intermetallic...

Claims

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Application Information

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IPC IPC(8): C22C49/12C22C49/14C22C47/04C22C47/14C22C121/02C22C101/10
Inventor 庞来学邢德进徐静李明田张金升
Owner SHANDONG JIAOTONG UNIV
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