Method for preparing carbon-loaded nano high-entropy alloy particle composite material

A technology of high-entropy alloys and composite materials, which is applied in the field of preparation of carbon-supported nano-high-entropy alloy particle composite materials, can solve the problems of high price and restrictions on the research and application of nano-high-entropy alloys and their composite materials, and achieve low cost, The effect of the simple operation of the preparation process

Active Publication Date: 2020-10-13
UNIV OF SCI & TECH BEIJING
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  • Abstract
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  • Application Information

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Problems solved by technology

Schuhmann (Advanced Energy Materials 8.34(2018):1802269) prepared nano high-entropy alloy materials by sputtering metals into ionic liquids. The above work has made important contributions to the research and application of nano high-entropy alloys and their composite materials. contribution, but the above work requires the

Method used

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  • Method for preparing carbon-loaded nano high-entropy alloy particle composite material
  • Method for preparing carbon-loaded nano high-entropy alloy particle composite material
  • Method for preparing carbon-loaded nano high-entropy alloy particle composite material

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Embodiment 1

[0033] A method for preparing a carbon-loaded nano high-entropy alloy particle composite material, comprising the following steps: (1) citric acid is dissolved in water at a concentration of 0.01g / mL, glycerin is added according to 6 times the molar weight of citric acid, and heated at 90°C Obtain uniform transparent mixed solution 1 under stirring; (2) add the nitrate of Al, Fe, Co, Ni, Cu one by one in mixed solution 1 according to 0.02 of citric acid molar weight, wherein Al, Fe, Co, Ni, The molar ratio of Cu is 1:1:1:1:0.8, and the mixed solution 2 is obtained by stirring; (3) the mixed solution 2 is stirred at 300° C. for 1 hour to obtain an organic network precursor containing multiple metal ions; (4) the precursor In a hydrogen atmosphere, the temperature was raised to 900° C. at 5° C. / min, held for 2 hours, and a high-temperature reduction reaction was carried out to obtain a carbon-supported nano high-entropy alloy particle composite material. The main components of t...

Embodiment 2

[0035] A preparation method of carbon-loaded nanometer high-entropy alloy particle composite material, comprising the following steps: (1) oxalic acid is dissolved in ethanol according to a concentration of 2g / mL, polyethylene glycol is added according to 2 times the molar weight of oxalic acid, and at 80 Obtain uniform and transparent mixed solution 1 under stirring under ℃; (2) add the isopropoxide of Mg, Al, Fe, Ni, Cu, Ti one by one in mixed solution 1 according to 0.02 of the molar weight of oxalic acid, wherein Mg, Al, The molar ratio of Fe, Ni, Cu, and Ti is 0.5:0.5:1:1:0.5:0.3, stirring to obtain mixed solution 2; (3) stirring mixed solution 2 at 250°C for 24 hours to obtain an organic network precursor containing multiple metal ions (4) Raise the temperature of the precursor to 1200°C at 3°C / min in a hydrogen-argon mixed gas atmosphere, keep it warm for 12 hours, and perform a high-temperature reduction reaction to obtain a carbon-supported nano-high-entropy alloy part...

Embodiment 3

[0037] A preparation method of carbon-supported nanometer high-entropy alloy particle composite material, comprising the following steps: (1) malic acid is dissolved in water according to the concentration of 5g / mL, ethylene glycol is added according to 10 times of the molar weight of malic acid, and at 70 Obtain uniform and transparent mixed solution 1 under stirring at ℃; (2) add the nitrates of Mg, Al, Fe, Ni, Co one by one in mixed solution 1 according to 0.05 of the molar weight of malic acid, wherein Mg, Al, Fe, Ni , the molar ratio of Co is 0.5:1:1:1:1, stirring to obtain a mixed solution 2; (3) stirring the mixed solution 2 at 100°C for 8 hours to obtain an organic network precursor containing multiple metal ions; (4) mixing The precursor was heated up to 700°C at 20°C / min in an argon atmosphere, and kept for 4 hours for a high-temperature reduction reaction to obtain a carbon-supported nano-high-entropy alloy particle composite. The transmission electron microscope ph...

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Abstract

The invention belongs to the field of new material preparation technology, and provides a method for preparing a carbon-loaded nano high-entropy alloy particle composite material. The operation process is simple, and the production cost is reduced. The method is to prepare a carbon-loaded nano high-entropy alloy particle composite material with adjustable component and controllable size by using ahigh-temperature reduction metal complex polymerization precursor. The specific method is as follows: the metal complex polymerization reaction is used to obtaining an organic network precursor containing multiple metal ions; and the organic network precursor undergoes a high-temperature reduction reaction to obtain the carbon-loaded nano high-entropy alloy particle composite material with high purity and uniform dispersion of alloy particles. According to the invention, the composition of the high-entropy alloy can be adjusted through the selection of metal nitrate, and then the size of thenano high-entropy alloy can be controlled through the adjustment of the molar ratio of the metal salt and the organic polymer and the selection of the complexing agent.

Description

technical field [0001] The invention belongs to the field of novel material preparation technology, and in particular relates to a preparation method of a carbon-loaded nanometer high-entropy alloy particle composite material. Background technique [0002] High-entropy alloy is a new type of alloy material. Compared with traditional alloys, high-entropy alloy has the characteristics of adjustable performance due to its unique composition. Performance opens up new design approaches. Therefore, high-entropy alloys have important application prospects in the fields of nuclear energy, high and low temperature resistant devices, and solar thermal energy utilization devices. [0003] The preparation of high-entropy alloy powder is of great significance to the research and application of alloy properties. Chinese patent 201710819270.9 adopts gas atomization method and mechanical alloying method to prepare high-entropy alloy powder, and the average particle size of the alloy powde...

Claims

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Application Information

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IPC IPC(8): B22F9/26B22F9/24B22F1/00B82Y40/00
CPCB22F9/26B22F9/24B82Y40/00B22F1/054
Inventor 曹文斌肖婷匡健磊蒲浩刘文秀
Owner UNIV OF SCI & TECH BEIJING
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