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Method of manufacturing fine helical nickel-carbon alloy material

A technology of micro-helical and nickel alloys, which is applied in the field of preparation of micro-helical carbon-nickel alloy materials, can solve the problems of low density, high specific strength, heat resistance, electrical and thermal conductivity, low magnetic loss, and carbon-nickel alloy materials that have not been reported. Problems, to achieve excellent mechanical properties and mechanical properties, good magnetic properties, strong interface binding effect

Inactive Publication Date: 2008-12-10
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, it has a series of advantages such as low density, high specific strength, heat resistance, electrical and thermal conductivity, and chemical stability, which are relatively close to the above ideal materials, but its low magnetic loss limits its application as a high-performance wave absorber. An important factor, while nickel is a metal with excellent magnetic loss performance, but it cannot be used alone as a wave absorber
At present, there is no report on the preparation of carbon-nickel alloy materials with regular microstructure based on helical carbon fibers.

Method used

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  • Method of manufacturing fine helical nickel-carbon alloy material

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Embodiment 1

[0013] Using CVD method, nickel powder is used as catalyst, acetylene is used as carbon source, hydrogen is used as reducing gas, nitrogen is used as protective gas, react at 750°C for 4 hours, the average diameter of the prepared micro-helical carbon fiber coil is 3-7 μm, and the pitch is about 0 . The prepared original microhelical carbon fibers were ultrasonically dispersed, cleaned with acetone, and then roughened with mixed acid (sulfuric acid / nitric acid = 3:1 (v / v)) for 4 h, and then in SnCl 2 Sensitization treatment in hydrochloric acid solution, followed by PdCl 2 Activation treatment is carried out in hydrochloric acid solution; magnetic stirring is used for sensitization and activation treatment; after each step of treatment, the fiber must be cleaned to neutral with deionized water to avoid bringing impurities into the next treatment solution. Dry the activated microhelical carbon fibers at 50°C for use.

[0014] Configure the nickel solution according to the fol...

Embodiment 2

[0016] Using CVD method, nickel powder is used as catalyst, acetylene is used as carbon source, hydrogen is used as reducing gas, nitrogen is used as protective gas, react at 750°C for 4 hours, the average diameter of the prepared micro-helical carbon fiber coil is 3-7 μm, and the pitch is about 0 . The prepared original microhelical carbon fibers were ultrasonically dispersed, cleaned with acetone, and then roughened with mixed acid (sulfuric acid / nitric acid = 3:1 (v / v)) for 4 h, and then in SnCl 2 Sensitization treatment in hydrochloric acid solution, followed by PdCl 2 Activation treatment is carried out in hydrochloric acid solution; magnetic stirring is used for sensitization and activation treatment; after each step of treatment, the fiber must be cleaned to neutral with deionized water to avoid bringing impurities into the next treatment solution. Dry the activated microhelical carbon fibers at 50°C for use.

[0017] Configure the nickel solution according to the fol...

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Abstract

The invention relates to a method for preparing a material of a micro-spiral nickel-carbon alloy, which is characterized in that a micro-spiral carbon fiber is processed by coarsening, sensitizing and activating, and a layer of low-phosphonium-nickel layer with continuity, evenness and moderate thickness is deposited on the micro-spiral carbon fiber through a chemical treatment so as to form the material of the micro-spiral nickel-carbon alloy. The method is characterized in that the process of coarsening allows a surface of the micro-spiral carbon fiber to be bonded with a functional group; the processes of sensitizing and activating allow the surface of the micro-spiral carbon fiber to be attached with a Pd atom having a catalysis function; controls of a reaction rate and reaction time guarantee that the content of nickel phase phosphonium is extremely low with even appearance, continuity and moderate thickness. The obtained material has a spiral type microcosmic shape. The nickel-carbon alloy material has not only a micro-spiral chiral structure, but also a good magnetic property. The alloy can be applied in the fields of preparing stealth coatings and composite materials.

Description

technical field [0001] The invention relates to a method for preparing a micro-helical carbon-nickel alloy material. The carbon-nickel alloy material with a regular microstructure is prepared on the basis of helical carbon fibers. Background technique [0002] In the field of microwave-absorbing material research, finding a microwave-absorbing material that has both excellent magnetic loss and high electrical loss performance and is suitable for the interphase of composite materials is the basis for improving the overall absorption efficiency of microwave-absorbing materials and expanding the scope of application. Due to its unique three-dimensional helical structure, micro-helical carbon fiber has a large specific surface area, high electrical conductivity and dielectric constant, thereby increasing the ability to scatter and absorb electromagnetic waves. At the same time, it has a series of advantages such as low density, high specific strength, heat resistance, electrical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C16/26C23C18/18C23C18/36
Inventor 吴海维寇开昌毕辉于秀荣王志超晁敏
Owner NORTHWESTERN POLYTECHNICAL UNIV
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