Synthesis in situ of intermetallic compound nano-particle

A technology of intermetallic compounds and nanoparticles, which is applied in the field of in-situ synthesis of intermetallic compound nanoparticles, can solve the problems of complex process, high cost, and difficult control, and achieve the effect of simple preparation process, low cost, and easy control

Inactive Publication Date: 2009-04-08
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problems of complex process, high cost, difficult control and easy agglomeration in the preparation of intermetallic compound nanoparticles, the present invention provides an in-situ synthesis method of intermetallic compound nanoparticles

Method used

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  • Synthesis in situ of intermetallic compound nano-particle

Examples

Experimental program
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Embodiment 1

[0019] Synthesis of Sn-Fe intermetallic nanoparticles:

[0020] 1. Preparation of bulk composite targets. First, mix the micron powders of Sn and Fe according to a certain mass ratio (for example, Sn / Fc=40 / 60), and mix them evenly through a V or Y-type mixer, and then mix the mixture at 50KN / cm 2 Use a special mold to press into a cylindrical target (diameter is 10mm, height is 50mm) under the pressure. The pressed target can also be vacuum sintered at a temperature lower than the melting point of Sn to improve conductivity.

[0021] 2. Put the target into the reaction chamber as a self-consumable anode, use a tungsten rod or a carbon rod as a cathode, and water-cool the electrode.

[0022] 3. Evacuate the reaction chamber to 10 -3 Torr, about 350 Torr of hydrogen and about 350 Torr of argon (or helium), open the circulating cooling water. The arc is ignited, the discharge evaporation is carried out in the DC arc plasma, and the arc distance is adjusted at any time to stab...

Embodiment 2

[0026] Synthesis of Mg-Cu intermetallic nanoparticles:

[0027] 1. Preparation of bulk composite targets. First mix the micron powders of Mg and Cu according to a certain molar ratio (for example, Mg / Cu=2 / 1), mix them evenly through a V or Y-type mixer, and then mix the mixture at 50KN / cm 2 Pressed into a cylindrical target under high pressure. (diameter is 10mm, height is 50mm).

[0028] 2. Put the cylindrical target into the reaction chamber and use it as a consumable anode, use a tungsten rod as the cathode, and water-cool the electrode.

[0029] 3. Evacuate the reaction chamber to 10 -3 Torr, about 350 Torr of hydrogen and about 350 Torr of argon (or helium), open the circulating cooling water. The arc is ignited, the discharge evaporation is carried out in the DC arc plasma, and the arc distance is adjusted at any time to stabilize the arc. The discharge current is 150-300 amperes; the voltage is 20-40 volts.

[0030] 4. After the powder preparation is completed, cu...

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Abstract

The invention provides an in situ synthesis method for an intermetallic compound nano particle, which belongs to the technical field of synthesizing a nano particle material. The method is characterized in that tin or magnesium and alloy micron powder which are low in melting point as well as a metal and alloy micron powder which are high in melting point are taken as materials; the materials are evenly mixed and pressed into a block target material which is used as a self-consumption anode; in the mixing atmosphere of active and inert gases, by utilizing a plasma heat source, the block target material is evaporated and subjected to gas-liquid-solid phase change; and the tin based and magnesium based binary or multiple intermetallic compound nano particle is prepared on the normal position. The method has the advantages of adopting the composite block target material, and synthesizing the intermetallic compound nano particle on the normal position, and has the characteristics of simple method, low cost, less impurities, clear and neat particle shape and suitability for mass production. The tin based or magnesium based intermetallic compound nano particle prepared by the method has wide application prospect in fields such as lithium ion cathode materials, hydrogen storage materials and the like.

Description

technical field [0001] The invention belongs to the technical field of synthesis of nanoparticle materials, and relates to an in-situ synthesis method of intermetallic compound nanoparticles. Background technique [0002] Intermetallic compounds have many unique physical and chemical properties. They have strong bonding force, higher working temperature than alloys, higher specific strength, specific stiffness and oxidation resistance. They are used in aerospace, national defense, new energy, Key materials for high and new technologies such as bioengineering and information technology. What have been developed and put into practical application mainly include high-temperature structural materials of intermetallic compounds, optical, electrical, and magnetic functional materials, shape memory alloys, hydrogen storage materials, and functional coating materials. Due to the room temperature brittleness of intermetallic compounds, most of the intermetallic compound devices are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D17/04
Inventor 董星龙雷军鹏黄昊朱旭光孙舰鹏吕波赵福国
Owner DALIAN UNIV OF TECH
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