Method for preparing hard magnetic oxide coating on metal base material

A technology of oxide coating and metal substrate, which is applied in the direction of metal material coating process, coating, molten spraying, etc., can solve the problems of magnetic thick film thickness and magnetic properties that cannot be fully satisfied, and achieve the promotion of development and application, Coating dense, environment-friendly effect

Inactive Publication Date: 2014-03-05
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing a hard magnetic oxide coating on a metal base material, which is to prepare MeFe on the metal base material by using plasma spraying technology. 12 o 19 The method of type permanent magnet ferrite coating overcomes the defect that the thickness and magnetic properties of the magnetic thick film prepared on the microsystem substrate by the prior art cannot fully meet the requirements of the miniaturized permanent magnet material device of the microelectromechanical system

Method used

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  • Method for preparing hard magnetic oxide coating on metal base material
  • Method for preparing hard magnetic oxide coating on metal base material
  • Method for preparing hard magnetic oxide coating on metal base material

Examples

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Embodiment 1

[0034] Preparation of Hard Magnetic SrFe on 20 Steel Substrate 12 o 19 type ferrite coating method.

[0035] The first step, the preparation of powder particles for plasma spraying

[0036] Commercially available raw material SrFe 12 o 19 Type ferrite powder, the powder particles for plasma spraying are prepared by spray granulation method, the above raw material SrFe 12 o 19 Type ferrite powder, solvent water and binder polyvinyl alcohol are fully stirred and mixed to make a slurry. The mass percentage of each component in the slurry is, the original SrFe 12 o 19 The solid content of type ferrite powder is 35%, the binder polyvinyl alcohol is 1%, and the rest is solvent water, and then spray granulation. The process parameters of spray granulation are: air outlet temperature 110°C, air inlet temperature 220°C ℃, feeding speed 35rpm, after spray granulation, the powder material is further sintered, the sintering temperature is 1100℃, the holding time is 2h, and finally ...

Embodiment 2

[0047] Except that the annealing heat treatment temperature of the fourth step in Example 1 is changed to 1100°C, the others are the same as in Example 1, and the prepared SrFe 12 o 19 The magnetic properties of the coating are listed in Table 1.

Embodiment 3

[0049] Except that the annealing heat treatment temperature of the fourth step in Example 1 is changed to 1200°C, the others are the same as in Example 1, and the prepared SrFe 12 o 19 The magnetic properties of the coating are listed in Table 1.

[0050] Comparative Example of Example 3

[0051] In addition, the commercially available SrFe 12 o 19 Type ferrite powder is prepared into a block by the traditional method, that is, first pressed into shape, and then sintered at 1200 ° C for 1 h to obtain SrFe 12 o 19 Block magnets.

[0052] Figure 4 Commercially available SrFe in Example 3 is given 12 o 19 After the hard magnetic oxide coating is annealed at 1200 °C for 1 h after plasma spraying of the type ferrite powder ( Figure 4 The hysteresis loop of the coated magnet) and the commercially available SrFe in the comparative example of Example 3 12 o 19 Type ferrite powder is sintered at 1200°C for 1 hour by traditional sintering process to obtain a block magnet ( ...

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Abstract

The invention provides a method for preparing a hard magnetic oxide coating on a metal base material and relates to a method for manufacturing a device applying electromagnetic or similar electromagnetic effect. The method comprises the following steps: preparing raw material MeFe12O19 type ferrite powder particles for plasma spraying by a spraying granulation method; spraying the powder particles on the pretreated metal base material by a plasma spraying technology, wherein the thickness of the hard magnetic oxide coating is 10 microns to 1 mm; performing annealing heat treatment on a workpiece of the metal base material coated with the MeFe12O19 hard magnetic oxide coating at the temperature of 800 to 1,200 DEG C for 1 hour; and performing fine grinding on the hard magnetic oxide coating to obtain the work piece of the metal base material coated with the MeFe12O19 hard magnetic oxide coating. By the method, the defects that the thickness and the magnetism of the magnetic thick film prepared on the metal base material cannot meet the requirements of micro-electronic machinery on miniature permanent magnet material devices in the prior art are overcome.

Description

technical field [0001] The technical solution of the invention relates to a method for manufacturing devices applying electro-magnetic or similar magnetic effects, specifically a method for preparing a hard magnetic oxide coating on a metal substrate. Background technique [0002] At present, the bulk permanent magnet materials on the market mainly include MeFe 12 o 19 (Me=Ba, Sr, Pb) permanent magnet ferrite, alnico permanent magnet alloy, Sm-Co permanent magnet alloy, Nd-Fe-B permanent magnet alloy, Fe-Cr-Co permanent magnet alloy. Many micro-electromechanical systems, such as micro-brakes, micro-engines, micro-generators, etc., require miniaturized permanent magnetic material devices. These small devices are usually prepared by cutting small slices from bulk sintered or bonded magnets, magnetized to saturation, and then bonded to the substrate in the final position in a complex microsystem. The installation process is complex and difficult. . In order to simplify the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/10C23C4/12C23C4/18C23C4/11C23C4/134
Inventor 孙继兵步绍静何继宁崔春翔阎殿然
Owner HEBEI UNIV OF TECH
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