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Multilayer iron nitride hard magnetic materials

A technology of nitrogen compounds and compounds, applied in the field of hard magnetic materials, can solve the problems of high manufacturing cost, shortage of supply, and environmental degradation of magnets

Inactive Publication Date: 2017-05-31
RGT UNIV OF MINNESOTA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Many permanent magnets in use today include rare earth elements such as neodymium, which result in high energy product
These rare earth elements are in relative short supply and may face price increases and / or supply shortages in the future
Additionally, some permanent magnets including rare earth elements are expensive to produce
For example, the manufacture of NdFeB and ferrite magnets generally involves crushing the material, compressing the material, and sintering at temperatures above 1000°C, all of which contribute to the high manufacturing cost of the magnets
In addition, the mining of rare earths can lead to serious environmental degradation

Method used

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  • Multilayer iron nitride hard magnetic materials
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  • Multilayer iron nitride hard magnetic materials

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Embodiment Construction

[0022]The present disclosure can be understood more readily by reference to the following detailed description, together with the accompanying drawings and examples, which form a part of this disclosure. It is to be understood that the present disclosure is not to be limited to the specific apparatus, methods, applications, conditions or parameters described and / or illustrated herein and that the terminology used herein is for the purpose of describing particular examples and is not intended to limit the claims. When expressing a numerical range, another example includes from the one particular value and / or to the other particular value. Similarly, when values ​​are expressed as approximations, by use of the antecedent "about," it will be understood that the particular value forms another example. All ranges are inclusive and combinable. Further, references to values ​​stated as being within a range include each and every value within that range. As used herein, use of the t...

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Abstract

The disclosure describes multilayer hard magnetic materials including at least one layer including alpha"-Fe16N2 and at least one layer including alpha"-Fe16(NxZ1-x)2 or a mixture of alpha"-Fe16N2 and alpha"-Fe16Z2, where Z includes at least one of C, B, or O, and x is a number greater than zero and less than one. The disclosure also describes techniques for forming multilayer hard magnetic materials including at least one layer including alpha"-Fe16N2 and at least one layer including alpha"-Fe16(NxZ1-x)2 or a mixture of alpha"-Fe16N2 and alpha"-Fe16Z2 using chemical vapor deposition or liquid phase epitaxy.

Description

[0001] References to related applications [0002] This application claims the benefit of US Provisional Patent Application No. 62 / 035,230, filed August 8, 2014, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates to hard magnetic materials and techniques for forming hard magnetic materials. Background technique [0004] Permanent magnets made of hard magnetic materials play a role in many electromechanical systems including, for example, alternative energy systems. For example, permanent magnets are used in electric motors or generators, which can be used in vehicles, wind turbines, and other alternative energy mechanisms. Many permanent magnets in use today include rare earth elements, such as neodymium, which result in a high energy product. These rare earth elements are relatively in short supply and may face price increases and / or supply shortages in the future. Additionally, some permanent magnet...

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Application Information

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IPC IPC(8): H01F1/055H01F1/059
CPCH01F10/147C30B19/00C30B25/00C23C16/448C30B29/38C23C16/45561C30B29/68C23C16/507H01F41/20H01F41/28C23C16/34C23C16/56H01F1/059H01F1/055H01F1/06H01F41/02H01F41/22H02K1/02
Inventor 王建平姜岩峰
Owner RGT UNIV OF MINNESOTA
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