Method for preparing superfine titanium powder through magnetized plasma rotating electrode method

A rotating electrode and plasma technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of large average particle size of powder and limited application range, and achieve the effect of good appearance

Pending Publication Date: 2022-05-13
四川真火等离子研究院有限公司
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Problems solved by technology

However, the average particle size of the powder prepared by the plasma rotating electrode method is relatively large because the electrode rotation speed is limited by the dynamic sealing problem.
The particle size of the powder is usually distributed in the range of 50-300 μm, and the powder below 100 μm accounts for about 20%, and the average particle size of the powder is relatively large, which limits the scope of application

Method used

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  • Method for preparing superfine titanium powder through magnetized plasma rotating electrode method
  • Method for preparing superfine titanium powder through magnetized plasma rotating electrode method
  • Method for preparing superfine titanium powder through magnetized plasma rotating electrode method

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Embodiment 1

[0020] This embodiment provides a method for preparing ultra-fine titanium powder by a magnetized plasma rotating electrode method, including: adding a magnetic mirror magnetic field with a magnetic induction intensity of 300-500Gs between the electric arc and the rotating electrode in the plasma rotating electrode method. When the electron temperature is about 10eV.

[0021] Since the electron temperature of the plasma is about 10eV, the potential on the surface of the titanium particles is about -10V, which prevents further accumulation of plasma electrons on the surface of the titanium particles. The Debye length of the plasma is λ_D, so the potential distribution of charged titanium particles in the plasma is:

[0022]

[0023] Where r≥Ro, r is the distance from the space point to the center of the titanium particle, Ro is the radius of the titanium particle, is the Debye shielded Coulomb potential of charged titanium particles in the plasma, λ D is the Debye radius ...

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Abstract

The invention belongs to the technical field of metal materials, and provides a method for preparing superfine titanium powder by a magnetized plasma rotating electrode method, which comprises the step of adding a magnetic field between an electric arc and a rotating electrode in the plasma rotating electrode method. According to the method, the superfine titanium powder is prepared through electrostatic coulomb repulsive force, the technical difficulty of high-speed rotation when PREP adopts centrifugal force to separate the titanium powder is avoided, the prepared titanium powder is good in spherical morphology, the average particle size is smaller than 10 micrometers, and the application occasion with the stricter requirement for the particle size of the titanium powder can be met.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a method for preparing ultrafine titanium powder by a magnetized plasma rotating electrode method. Background technique [0002] The plasma rotating electrode method (PREP) is a consumable electrode made of a high-purity titanium rod, and then heated and melted by a rare gas (argon) plasma to form a metal liquid film, and finally the titanium is atomized by the centrifugal force of the electrode rotation. pink. [0003] At present, the plasma rotating electrode method has gradually replaced the rotating electrode method (REP) and the electron beam rotating disk method (EBRD) to prepare fine spherical titanium powder. Compared with REP and EBRD, the main advantages of PREP are the high sphericity of the prepared powder, good surface morphology, low impurity content, and the particle size distribution of the powder can be adjusted by the rotation speed and elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/14B22F1/065B22F1/05
CPCB22F9/14
Inventor 赵华施可敏马太华李本南
Owner 四川真火等离子研究院有限公司
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