Preparation method for rare-earth-modified graphene reinforced metal matrix composite bar

A technology of metal matrix composite and rare earth modification, applied in the direction of graphene, nano-carbon, etc., can solve the problems of poor wettability and poor dispersion, and achieve the effects of high density, reduced oxidation, and high-strength thermal conductivity

Active Publication Date: 2017-06-23
JIANGXI UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0004] In order to achieve the above object, the present invention provides a preparation method of rare earth modified graphene-reinforced metal-based composite rod, which solves the shortcomings of poor dispersion and poor wettability of graphene in the matrix metal, and the obtained composite material has high density , excellent mechanical properties and electrical conductivity, simple preparation process, low cost, suitable for large-scale production

Method used

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  • Preparation method for rare-earth-modified graphene reinforced metal matrix composite bar

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Effect test

Embodiment 1

[0048] Prepare a rare earth solution using ethanol as a solvent, wherein the mass fractions of the various components of the rare earth solution are: 0.05% of rare earth compounds, 2.0% of ammonium chloride, 0.01% of urea, and 0.3% of sodium dimercaptopropanesulfonate; Heating to 75° C., keeping the temperature for 10 minutes, and then adjusting the pH of the rare earth solution to 5 with nitric acid to obtain a rare earth modified solution. According to the ratio of 200mg / mL, the graphene oxide was immersed in the rare earth modified solution at 18°C, and ultrasonically dispersed for 3 hours, with an ultrasonic power of 2000W and a frequency of 20KHz, to obtain a modified graphene oxide dispersion. Subsequently, a hydrazine hydrate solution with a mass concentration of 80% was added to the modified graphene oxide dispersion liquid, and the modified graphene oxide dispersion liquid and hydrazine hydrate were reduced according to a volume ratio of 10:7 to obtain a graphene solut...

Embodiment 2

[0050] Prepare a rare earth solution with ethanol as a solvent, wherein the mass fraction of the various components of the rare earth solution is: 5.0% of rare earth compound, 0.1% of ammonium chloride, 2.0% of urea, and 0.15% of sodium dimercaptopropanesulfonate; Heating in a water bath to 85° C., keeping the temperature for 5 minutes, and then adjusting the pH of the rare earth solution to 6 with nitric acid to obtain a modified rare earth solution. According to the ratio of 500mg / mL, the graphene oxide was immersed in the rare earth modified solution at 22°C, and ultrasonically dispersed for 6 hours, with an ultrasonic power of 900W and a frequency of 75KHz, to obtain a modified graphene oxide dispersion. Subsequently, a hydrazine hydrate solution with a mass concentration of 80% was added to the modified graphene oxide dispersion, and the modified graphene oxide dispersion and hydrazine hydrate were reduced to obtain a graphene solution in a volume ratio of 10:10. Then, it...

Embodiment 3

[0052] Prepare a rare earth solution using ethanol as a solvent, wherein the mass fractions of the various components of the rare earth solution are: 3% of rare earth compounds, 1% of ammonium chloride, 1% of urea, and 0.2% of sodium dimercaptopropanesulfonate; Heating to 80° C., keeping the temperature for 7 minutes, and then adjusting the pH of the rare earth solution to 5 with nitric acid to obtain a rare earth modified solution. According to the ratio of 300mg / mL, the graphene oxide was immersed in the rare earth modified solution at 20°C, and ultrasonically dispersed for 4 hours, with an ultrasonic power of 1500W and a frequency of 55KHz, to obtain a modified graphene oxide dispersion. Subsequently, a hydrazine hydrate solution with a mass concentration of 80% was added to the modified graphene oxide dispersion, and the modified graphene oxide dispersion and hydrazine hydrate were reduced to obtain a graphene solution in a volume ratio of 10:8. Then, it was washed several...

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Abstract

The invention discloses a preparation method for a rare-earth-modified graphene reinforced metal matrix composite material. Oxidized graphene is subjected to modifying treatment through rare earth, and then high-dispersity rare earth modified graphene powder is obtained through reduction; the modified graphene powder and metal powder are subjected to ball-milling and powder mixing, and then ball-milled composite powder is packed into a bag; welding and sealing are conducted after vacuum pumping; and the rare-earth-modified graphene reinforced metal matrix composite material is prepared through processes of hot isostatic pressing and hot extrusion forming. By adding trace rare earth elements, oxidizing of the graphene and the metal powder in the preparation process can be reduced, dispersity and interfacial wettability of the praphene in a metal matrix are improved, and the mechanical and conductive properties of a graphene reinforced metal matrix composite material are improved. Meanwhile, the preparation method is simple and easy to carry out in process, low in production cost, suitable for scale production and has good market prospects.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and relates to a preparation method of a rare earth modified graphene-reinforced metal matrix composite rod. Background technique [0002] Graphene is carbon atoms with sp 2 A new type of two-dimensional atomic crystal composed of hybridized monoatomic layers has a series of rich and peculiar physical properties: super large specific surface area (2630m 2 / g), is the material with the highest known strength at present, reaching 130GPa; its carrier mobility reaches 15000cm 2 / (V s); the thermal conductivity is as high as 5150W / (m K), which is 3 times that of pure diamond at room temperature. The unique physical, chemical and mechanical properties of graphene have laid an important foundation for the development of composite materials. It is an ideal reinforcement for various composite materials. . Geim, the 2010 Nobel Prize winner, believes that although graphene has mad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C22C9/00C22C21/00C22C23/00C22C32/00B22F3/15B22F3/20B22F9/04B22F9/16C01B32/184
CPCB22F3/15B22F3/20B22F9/04B22F9/16B22F9/24B22F2003/208B22F2009/043B22F2009/165C22C9/00C22C21/00C22C23/00C22C32/0084
Inventor 李勇李焕朱靖赵亚茹袁华丽胡咏梅许方
Owner JIANGXI UNIV OF SCI & TECH
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