Method for preparing TaC nano-powder material
A technology of nano powder and argon gas, which is applied in the direction of nanotechnology, nanotechnology, nanostructure manufacturing, etc., to achieve the effect of reducing free carbon and increasing yield
Inactive Publication Date: 2010-09-15
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology
use C 2 h 5 The method for preparing TaC nanometer powder material from OH has not been reported
Method used
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Embodiment 1
[0038] The block of Ta is used as the target material, the argon pressure is 0.02MPa, the arc discharge current is 60-110A, the voltage is 15-25V, and the ethanol is 0.7ml / liter according to the volume of the working room. After the arc is extinguished, 0.01Mpa of argon and 0.02Mpa of air are put into passivation, and the passivation time is 5 hours, and the prepared TaC nanometer powder material. Figure 2-Figure 9 To analyze the test results.
Embodiment 2
[0040] Ta is used as the target material, the working gas is argon and hydrogen, the pressure is 0.02MPa and 2kPa hydrogen, the current of arc discharge generated by gas is 60-110A, the voltage is 15-25V, and the ethanol is 0.5ml / liter according to the volume of the working room. After the arc is extinguished, 0.01Mpa of argon and 0.02Mpa of air are put into passivation, and the passivation time is 5 hours, and the TaC nanometer powder material is prepared. Figure 2-Figure 9 To analyze the test results.
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Abstract
The invention provides a method for preparing TaC nanometer powder material, and the shell of the nanometer powder is carbon. The method is characterized in that argon gas and ethanol are used as the working gases and the preparation technology that arc discharge produces plasma is adopted; the component for anode consumption is Ta, the component for cathode consumption is graphite; the preparation of the TaC nanometer powder is carried out under the atmosphere of the mixture of the argon gas and C2H5OH, the pressure of the argon gas is 0.5kPa-0.5MPa, the dosage of C2H5OH is proportional to the volume of the working cavity and is 0.05-5ml / litre; the distance between the anode consumption and cathode is 0.1mm-5cm, the current of the arc discharge is 8-600A and the voltage of the arc discharge is 5-50V. Due to making use of ethanol to carry out the decomposition, carbon source in a gaseous state is provided, which improves the yield of the TaC nanometer powder and reduces the free carbon.
Description
technical field [0001] The invention relates to a technology for preparing metal nanopowder materials, and particularly provides a 2 h 5 A method for preparing TaC nano powder material in OH mixed atmosphere. Background technique [0002] TaC nano powder materials have important uses in the coating industry. TaC has a high hardness, a melting point of 3985°C, and good high temperature performance. TaC nano powder material is used as jet engine turbine blade and rocket nozzle coating, which can significantly improve its service life. In the production of electron emission tubes, TaC nano powder is used as the intermediate layer composite coating. Superalloys made of TaC and a series of metals such as tungsten, aluminum, nickel, cobalt, and vanadium are good structural materials for supersonic jets, rockets, and missiles. In the machinery industry, tools made of cemented carbide such as TaC nanopowder can withstand high temperatures of nearly 3000 ° C, and its hardness ca...
Claims
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IPC IPC(8): C01B31/30C04B35/622C04B35/56B82B3/00
Inventor 耿殿禹张志东李达王振华刘先国佟敏张滨胡魁义任卫军宋小平
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI