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NdFeB (neodymium iron boron) surface modified permanent magnetic material and preparation method thereof

A permanent magnet material and surface modification technology, applied in the direction of magnetic materials, magnetic objects, electrodes, etc., can solve the problems of inability to meet the use requirements, poor temperature characteristics, pulverization corrosion, etc., to achieve reduced corrosion resistance, high-quality board surface Good quality and good brightness

Inactive Publication Date: 2013-07-17
KUN SHAN POWER STENCIL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The advantages of NdFeB are high cost performance, low cost, and good mechanical properties; however, due to its low Curie temperature and poor temperature properties, it is easy to powder and corrode, and often cannot meet the requirements for direct use.

Method used

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  • NdFeB (neodymium iron boron) surface modified permanent magnetic material and preparation method thereof

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Embodiment Construction

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0022] The invention discloses a surface-modified permanent magnet material of NdFeB, which uses an intermetallic compound Re 2 Fe- 14 B is the substrate, and the surface is electroplated with a nickel-iron alloy coating.

[0023] Wherein, the nickel-iron alloy coating is composed of nickel Ni element and iron Fe element; the mass percentage of each element is: Ni: 45-60%, Fe: 40-55%.

[0024] The invention is applied to the manufacture of high-precision electronic components, and the permanent magnet material has good magnetism, hardn...

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Abstract

The invention discloses an NdFeB (neodymium iron boron) surface modified permanent magnetic material and a preparation method thereof. An intermetallic compound of Re2Fe-14B is used as a matrix for the NdFeB surface modified permanent magnetic material, and a permanent magnetic material of a nickel-iron alloy plating layer is electroplated on the surface. The nickel-iron alloy plating layer is formed by two elements of Ni and Fe, wherein the content of Ni is 45-60 percent, and the content of Fe is 40-55 percent; and the preparation method of the nickel-iron alloy plating layer comprises the following steps that an electroplating method is adopted, a sulfate system is taken as electroplating liquid, the matrix of Re2Fe-14B is taken as a cathode, graphite is taken as an anode, and the nickel-iron alloy plating layer is deposited on the cathode to carry out surface modification. By the adoption of the electroplating process, the obtained product is smooth, has no burrs, and is high in precision, and bright in plate surface, the surface uniformity is within 5 percent, and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of element preparation, and relates to a surface-modified permanent magnet material of neodymium-iron-boron, in particular to a method for preparing a nickel-iron alloy coating with high iron content. [0002] Background technique [0003] NdFeB magnetic material, as the latest result of the development of rare earth permanent magnet materials, is known as the "Magnetic King" because of its excellent magnetic properties. NdFeB magnetic materials are intermetallic compounds, and their molecular formula is usually Re 2 Fe- 14 B, causing high iron content, also known as "magnetic steel". NdFeB has extremely high magnetic energy product and coercive force, and the advantages of high energy density make NdFeB permanent magnet materials widely used in modern industry and electronic technology. It has a wide range of applications in the miniaturization, light weight, and thinning of equipment such as magnetizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057C25D3/56C25D7/00C25D17/10
Inventor 魏志凌高小平王峰
Owner KUN SHAN POWER STENCIL
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