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Boron nitride nanosheet reinforced nickel-aluminum intermetallic compound composite coating and preparation method thereof

An intermetallic compound and composite coating technology, which is applied in metal material coating process, coating, melt spraying and other directions, can solve problems such as reducing tribological properties

Inactive Publication Date: 2021-03-26
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene oxidizes at temperatures above 350°C, which reduces the tribological properties of the material at high temperatures

Method used

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  • Boron nitride nanosheet reinforced nickel-aluminum intermetallic compound composite coating and preparation method thereof
  • Boron nitride nanosheet reinforced nickel-aluminum intermetallic compound composite coating and preparation method thereof
  • Boron nitride nanosheet reinforced nickel-aluminum intermetallic compound composite coating and preparation method thereof

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preparation example Construction

[0038] The invention provides a boron nitride nanosheet reinforced Ni 3 The preparation method of Al intermetallic compound composite coating comprises:

[0039] Mix nickel powder and aluminum powder to obtain mixed powder;

[0040] mixing the mixed powder with the boron nitride nanosheet dispersion and drying to obtain a powder;

[0041] The powder is subjected to spray granulation to obtain a spray feed;

[0042] The spraying feed material is carried out plasma spraying, obtains the boron nitride nanosheet reinforced Ni 3 Al intermetallic composite coating.

[0043] In the present invention, the preparation method of the mixed powder preferably includes:

[0044]The nickel powder and the aluminum powder are ball-milled with isopropanol to obtain a slurry;

[0045] The slurry was dried and ground to obtain a mixed powder.

[0046] In the present invention, the equipment of the ball mill is preferably a horizontal planetary ball mill, and the ratio of ball to material in...

Embodiment 1

[0074] Weigh 85wt.% nickel powder (~1μm) and 15wt.% aluminum powder (~1μm) with an electronic balance;

[0075] Put the nickel powder and aluminum powder into a horizontal planetary ball mill and add isopropanol for ball milling. During the ball milling process, the ratio of ball to material is 4:1, the speed of the ball mill is 300r / min, and the ball mill is 6 hours to obtain a mixed slurry;

[0076] The above mixed slurry was dried in a vacuum drying oven at 70°C, and then ground into powder to obtain a mixed powder;

[0077] placing the boron nitride nanosheets in isopropanol for ultrasonic dispersion for 4 hours to obtain a boron nitride nanosheet dispersion;

[0078] Put the mixed powder into the dispersion of boron nitride nanosheets, stir and disperse with a homogenizer at a speed of 5000 rpm for 5 hours, dry the obtained mixture in a vacuum oven at 80°C, and then grind it into Powder, to obtain a powder, the mass content of boron nitride nanosheets in the powder is 0....

Embodiment 2

[0082] Weigh 85wt.% nickel powder (~1μm) and 15wt.% aluminum powder (~1μm) with an electronic balance;

[0083] Put the nickel powder and aluminum powder into a horizontal planetary ball mill and add isopropanol for ball milling. During the ball milling process, the ratio of ball to material is 4:1, the speed of the ball mill is 300r / min, and the ball mill is 6 hours to obtain a mixed slurry;

[0084] The above mixed slurry was dried in a vacuum drying oven at 70°C, and then ground into powder to obtain a mixed powder;

[0085] placing the boron nitride nanosheets in isopropanol for ultrasonic dispersion for 4 hours to obtain a boron nitride nanosheet dispersion;

[0086] Put the mixed powder into the dispersion of boron nitride nanosheets, stir and disperse with a homogenizer at a speed of 5000 rpm for 5 hours, dry the obtained mixture in a vacuum oven at 80°C, and then grind it into Powder, to obtain a powder, the mass content of boron nitride nanosheets in the powder is 1%...

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Abstract

The invention provides a preparation method of a boron nitride nanosheet reinforced Ni3Al intermetallic compound composite coating. The method comprises the following steps: mixing nickel powder and aluminum powder to obtain mixed powder; mixing and drying the mixed powder and boron nitride nanosheet dispersion liquid so as to obtain powder; carrying out spray granulation on the powder to obtain aspray feed; and carrying out plasma spraying on the spray feed so as to obtain the boron nitride nanosheet reinforced Ni3Al intermetallic compound composite coating. The invention provides the preparation method of the intermetallic compound composite coating with light weight, high strength and toughness and lubricating property, and the novel boron nitride nanosheet reinforced Ni3Al intermetallic compound composite coating with various excellent properties such as high temperature resistance, wear resistance, corrosion resistance, low friction coefficient and the like is obtained. The invention further provides the boron nitride nanosheet reinforced Ni3Al intermetallic compound composite coating.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a boron nitride nanosheet reinforced Ni 3 Al intermetallic compound composite coating and preparation method thereof. Background technique [0002] In aerospace, petrochemical metallurgy, energy power, marine engineering and other major national high-tech equipment, there are a large number of key metal friction motion auxiliary parts that are related to the service safety of the equipment. The service life of components is reduced due to strong friction and wear under extremely harsh service conditions such as corrosion, oxidation, and corrosion, which in turn affects the reliability and life of the entire equipment. Typically, kinematic components fail at their surfaces. Therefore, while maintaining the inherent comprehensive properties (toughness, strength, etc.) The method is considered to be an effective and economical method to solve the above problems. [0003] Ni 3 ...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/06
CPCC23C4/134C23C4/06
Inventor 陈瑶陆小龙刘卫卫
Owner SUZHOU UNIV
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