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Composite magnets and methods of making composite magnets

A permanent magnet, integral technology, applied in chemical instruments and methods, magnets, inductance/transformer/magnet manufacturing, etc., can solve problems such as sacrificing coercive force and inability to achieve magnetic properties

Pending Publication Date: 2021-05-21
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional composite magnets are formed by adding soft magnetic phases to NdFeB or SmCo, however these magnets cannot achieve magnetic properties beyond conventional sintered Nd-Fe-B magnets because despite enhanced remanence, coercivity is sacrificed force

Method used

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  • Composite magnets and methods of making composite magnets
  • Composite magnets and methods of making composite magnets
  • Composite magnets and methods of making composite magnets

Examples

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Embodiment Construction

[0020] Embodiments of the disclosure are described herein. It should be understood, however, that the disclosed embodiments are merely examples and that other embodiments may assume various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention. As will be understood by those of ordinary skill in the art, various features shown and described with reference to any one of the figures may be combined with features shown in one or more other figures to produce the embodiment. The combinations of features shown provide representative embodiments of typical applications. Various combinations and modifications of the features, however, may be desired for particula...

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Abstract

Provided are composite magnets and methods of making composite magnets. A composite permanent magnet includes at least one magnetically-hard portion formed from a compacted powder material and at least one magnetically-soft portion mixed with the at least one magnetically-hard portion. The composite permanent magnet also includes a nonmagnetic outer coating portion applied to each magnetically-soft portion to isolate the coated magnetically-soft portion from magnetically-hard portions, thereby inhibiting demagnetization of the at least one magnetically-hard portion.

Description

technical field [0001] The present disclosure relates to a composite permanent magnet having a hard magnetic phase and a soft magnetic phase. Background technique [0002] Permanent magnets have a wide range of applications due to their permanent permanent magnetic flux. Rare earth permanent magnets (such as Nd—Fe—B or Sm—Co permanent magnets) include rare earth elements that exhibit excellent hard magnetic properties through high coercivity, high magnetic flux density and thus high The energy density is shown. Conventional Sm-Co and Nd-Fe-B magnets are costly due to low natural occurrence and have limited ability to improve magnetic properties. [0003] One way to improve the magnetic properties of Sm-Co and Nd-Fe-B permanent magnets is to add soft magnetic phases, such as Fe and / or Fe-Co. The soft magnetic phase has a high magnetic flux density, which increases the remanence of the final magnet and thus improves the resulting energy product application. Conventional co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F7/02H01F41/02H01F1/057
CPCH01F1/057H01F7/02H01F41/0253B32B15/01H01F1/0579H01F7/021H01F41/0266B32B2307/208H01F1/0571
Inventor 荣传兵
Owner FORD GLOBAL TECH LLC