Preparation method and application of tissue-controllable ultrahigh-purity cobalt plate

A pure cobalt plate, ultra-high technology, applied in the field of preparation of ultra-high-purity cobalt plate, can solve the problems of uneven grain size distribution, low β-Co phase content, substandard magnetic permeability, etc., and achieve billet substructure. The effect of uniform distribution of defects, elimination of ingot shrinkage and uniform internal structure

Active Publication Date: 2020-03-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the problems in the prior art that the cobalt target used for magnetron sputtering has low purity, uneven grain size distribution, low β-Co phase content of the face centered cubic fcc structure, and substandard magnetic permeability, the purpose of the present invention is to provide A preparation method and application of an ultra-high-purity cobalt plate with controllable structure. A high-purity billet is prepared by a smelting method, and the billet is opened by multiple three-dimensional high-speed isothermal hot forging, and a variable-angle cross-rolling process is adopted. Obtain ultra-high-purity cobalt targets with excellent comprehensive performance

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  • Preparation method and application of tissue-controllable ultrahigh-purity cobalt plate
  • Preparation method and application of tissue-controllable ultrahigh-purity cobalt plate
  • Preparation method and application of tissue-controllable ultrahigh-purity cobalt plate

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Embodiment 1

[0040]This embodiment provides a method for preparing a tissue-controllable ultra-high-purity cobalt target, including the following steps:

[0041] The cobalt powder (purity is 99.997%) is subjected to vacuum vertical melting after cold isostatic pressing under 200MPa pressure. The vertical melting temperature is 1320°C and the vacuum degree is 10 -4 Pa; put the vertical molten cobalt ingot in a high vacuum of 10 -4 Melting in a Pa electron beam melting furnace, the melting temperature is 1580°C, after cooling, the ingot is again placed in a high vacuum -4 Melting in a Pa electron beam melting furnace at a melting temperature of 1580°C (each melting time is 0.5 hours); the obtained high-density ingot is covered with stainless steel in an argon chamber; the wrapped ingot is heated to 950°C and kept warm For 1.5 hours, make the axial direction of the billet parallel to the direction of the forging force, and carry out two forging deformations, in which the deformation of the f...

Embodiment 2

[0058] This embodiment provides a method for preparing a tissue-controllable ultra-high-purity cobalt target, including the following steps:

[0059] The cobalt powder (purity is 99.997%) is subjected to vacuum vertical melting after cold isostatic pressing under 200MPa pressure. The vertical melting temperature is 1320°C and the vacuum degree is 10 -4 Pa; put the vertical molten cobalt ingot in a high vacuum of 10 -4 Melting in a Pa electron beam melting furnace, the melting temperature is 1580°C, after cooling, the ingot is again placed in a high vacuum -4 Melting in a Pa electron beam melting furnace at a melting temperature of 1580°C (each melting time is 0.5 hours); the obtained high-density ingot is covered with stainless steel in an argon chamber; the wrapped ingot is heated to 950°C and kept warm For 1.5 hours, make the axial direction of the billet parallel to the direction of the forging force, and carry out two forging deformations, in which the deformation of the ...

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Abstract

The invention discloses a preparation method and application of a tissue-controllable ultrahigh-purity cobalt plate. The preparation method comprises the following steps of cold-pressing molding, high-vacuum-degree vertical melting, high-vacuum-degree electron beam smelting furnace, argon chamber stainless steel wrapping, pass forging deformation amount and total deformation amount coordinately-controlled three-dimensional high-speed equal-temperature hot forging cogging, variable-angle cross-control rolling and heat treatment, turning machining, packaging and the like. The prepared ultrahigh-purity cobalt purity is greater than or equal to 99.995%, the average grain size is 10-40 microns, the beta-Co content of the fcc structure in the plate is more than 50%, the magnetic permeability isgreater than 70%, and the magnetic permeability non-uniformity is less than 1%. According to the preparation method, the grain size and the grain size distribution of the finished product can be effectively controlled, and the tissue distribution of the finished product is regulated and controlled, so that the raw material guarantee is provided for the finished product to be used as the high-quality target material.

Description

technical field [0001] The invention belongs to the technical field of design and preparation of special materials, and in particular relates to a preparation method and application of an ultra-high-purity cobalt plate with controllable tissue. Background technique [0002] Metal cobalt is a typical ferromagnetic metal. When it is not magnetized, its interior is divided into many spontaneously magnetized magnetic domains (magnetization tends to be saturated). Since the magnetic moment directions and sizes of magnetic domains are different from each other, Therefore, the net magnetic moment and the magnetization vector of the ferromagnetic material are both zero. When a certain external magnetic field is applied, the orientation of the originally randomly arranged magnetic domains will tend to be consistent, and the ferromagnet will show stronger magnetism at this time. As magnetic materials, cobalt and cobalt-based alloys are widely used in the preparation of optoelectronic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C22B9/22C22B9/04C22F1/10B22F3/04
CPCB22F3/04C22B9/04C22B9/228C22F1/10C23C14/3414C23C14/35
Inventor 肖柱方梅李周朱云天陈志永
Owner CENT SOUTH UNIV
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