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Preparation method and application of oxidized graphene reinforced nickel base composite powder

A composite powder and graphene technology, which is applied in the field of graphene-reinforced nickel-based alloy composite materials, can solve the problems of inability to form complex nickel-based alloy parts, poor graphene dispersion, and low process efficiency, so as to prevent agglomeration, disperse The effect of uniformity and improvement of strengthening efficiency

Inactive Publication Date: 2019-05-14
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a preparation method of graphene oxide reinforced nickel-based composite powder and its application, by forming graphene oxide and nickel alloy powder into negatively charged and positively charged surfaces respectively After the solution and powder are prepared, electrostatic self-assembly occurs between the two, so that graphene oxide is evenly adsorbed on the surface of the nickel alloy powder, so as to solve the problem of poor dispersion of graphene, easy agglomeration, and the low efficiency of traditional manufacturing processes, which cannot form complex nickel alloys. Technical problems of alloy parts

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  • Preparation method and application of oxidized graphene reinforced nickel base composite powder

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preparation example Construction

[0026] A preparation method of graphene oxide reinforced nickel-based composite material, comprising the steps of:

[0027] (1) A step for preparing graphene oxide: 1.0 g of sodium nitrate, 1.0 g of graphite and 46 mL of concentrated sulfuric acid were stirred in an ice-water bath for 15 minutes. Slowly add 6.0 g of potassium permanganate in an ice-water bath to obtain a purple-green mixed solution, and control the temperature not to exceed 20°C. After removing the ice-water bath, the mixture was stirred in a 35±5°C water bath for 1 hour to form a thick paste. Then, 40 mL of distilled water was added slowly, the temperature was raised to 90±5°C, and the mixture was stirred at this temperature for 30 minutes. Finally, add 100mL of distilled water, then slowly add 6mL of hydrogen peroxide (30wt.%), after the color of the solution changes from dark brown to bright yellow, the resulting mixed solution is washed several times with 3% hydrochloric acid and distilled water until the...

Embodiment 1

[0046] Embodiments of the present invention provide a method for preparing graphene-reinforced nickel-based composite materials, specifically as follows:

[0047] (1) A step for preparing graphene oxide: 1.0 g of sodium nitrate, 1.0 g of graphite and 46 mL of concentrated sulfuric acid were stirred in an ice-water bath for 15 minutes. Slowly add 6.0 g of potassium permanganate in an ice-water bath to obtain a purple-green mixed solution, and control the temperature not to exceed 20°C. After removing the ice-water bath, the mixture was stirred in a 35±5°C water bath for 1 hour to form a thick paste. Then, 40 mL of distilled water was added slowly, the temperature was raised to 90±5°C, and the mixture was stirred at this temperature for 30 minutes. Finally, 100 mL of distilled water was added, followed by the slow addition of 6 mL of hydrogen peroxide (30 wt.%). After the color of the solution changed from dark brown to bright yellow, the resulting mixed solution was washed se...

Embodiment 2

[0060] Embodiments of the present invention provide a method for preparing graphene-reinforced nickel-based composite materials, specifically as follows:

[0061] (1) A step for preparing graphene oxide: 1.0 g of sodium nitrate, 1.0 g of graphite and 46 mL of concentrated sulfuric acid were stirred in an ice-water bath for 15 minutes. Slowly add 6.0 g of potassium permanganate in an ice-water bath to obtain a purple-green mixed solution, and control the temperature not to exceed 20°C. After removing the ice-water bath, the mixture was stirred in a 35±5°C water bath for 1 hour to form a thick paste. Then, 40 mL of distilled water was added slowly, the temperature was raised to 90±5°C, and the mixture was stirred at this temperature for 30 minutes. Finally, 100 mL of distilled water was added, followed by the slow addition of 6 mL of hydrogen peroxide (30 wt.%). After the color of the solution changed from dark brown to bright yellow, the resulting mixed solution was washed se...

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Abstract

The invention belongs to the field of graphene reinforced nickel base alloy composite materials, and discloses a preparation method of oxidized graphene reinforced nickel base composite powder. The preparation method includes the following steps: (a), oxidized graphene is dissolved to form a negatively charged oxidized graphene water solution, and nickel base alloy powder is dissolved to form positively charged nickel alloy powder; and (b), the nickel alloy powder with the positively charged surface is dissolved in distilled water, then the oxidized graphene water solution with the negativelycharged surface is added, and the mixture is stirred until being colorless and transparent, in the process, the oxidized graphene with the negatively charged surface and the nickel alloy powder with the positively charged surface are subjected to electrostatic self-assembly to form precipitation, and the desired oxidized graphene-nickel alloy composite powder is obtained after filtration and freeze-drying. The invention further discloses the oxidized graphene reinforced nickel base composite powder and application thereof. According to the preparation method of the oxidized graphene reinforcednickel base composite powder, the oxidized graphene is uniformly dispersed in a nickel matrix, agglomeration of the oxidized graphene is avoided, and comprehensive mechanical properties of compositematerials are improved effectively.

Description

technical field [0001] The invention belongs to the field of graphene-reinforced nickel-based alloy composite materials, and more specifically relates to a preparation method and application of graphene oxide-reinforced nickel-based composite powder. Background technique [0002] With the development of society, people's demand for high-performance materials has become more urgent, and the research and development of materials with high strength, high toughness, light weight and other characteristics has become an inevitable requirement for the development of the material field. At present, how to improve the performance of materials used in aviation, aerospace, navigation and other fields, such as strength, toughness, high temperature resistance, corrosion resistance, as well as reduce the amount of materials used and improve the utilization efficiency has become a matter of great concern to scholars. Metal matrix composites combine the comprehensive properties of metal and...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C1/10C22C19/03
Inventor 文世峰陈柯宇周燕李伟胡辉王冲刘洋史玉升
Owner HUAZHONG UNIV OF SCI & TECH
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