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Feni ordered alloy, feni ordered alloy magnet and manufacturing method of feni ordered alloy

A technology of ordered alloy and degree of order, applied in the direction of magnetic objects, magnetic materials, inorganic materials, etc., can solve the problem of slow diffusion

Active Publication Date: 2021-11-19
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, for getting L1 0 The transformation temperature Tλ of the FeNi ordered alloy is as low as 320°C. Since the diffusion is extremely slow below this temperature, it is difficult to synthesize it only by heat treatment.

Method used

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  • Feni ordered alloy, feni ordered alloy magnet and manufacturing method of feni ordered alloy
  • Feni ordered alloy, feni ordered alloy magnet and manufacturing method of feni ordered alloy
  • Feni ordered alloy, feni ordered alloy magnet and manufacturing method of feni ordered alloy

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no. 1 Embodiment approach

[0040] The first embodiment will be described. L1 involved in this embodiment 0 The FeNi ordered alloy, that is, the FeNi superlattice is an alloy suitable for magnetic materials such as magnet materials and magnetic recording materials. alloy.

[0041] The degree of order S referred to here means the degree of ordering in the FeNi superlattice. As mentioned above, L1 0 The type ordered structure becomes a face-centered cubic lattice as the basic structure, with figure 1The lattice structure shown in . In this figure, the uppermost layer in the stacked structure of the [001] plane of the face-centered cubic lattice is defined as an I site, and the intermediate layer between the uppermost layer and the lowermost layer is Set as II site. In this case, if x is the ratio of the presence of metal A in the I site and 1-x is the ratio of the presence of metal B in the I site, the ratio of the presence of metal A and metal B in the I site is expressed as A x B 1-x . Similarly...

no. 2 Embodiment approach

[0100] A second embodiment will be described. This embodiment is a form in which the degree of order S can be further improved compared to the first embodiment. Also in this embodiment, since the basic manufacturing process is the same as that of the first embodiment, only the parts different from the first embodiment will be described.

[0101] In this embodiment, when L1 is formed of FeNi disordered alloy 0 In the case of FeNi-type ordered alloys, the degree of order S is further improved by generating intermediate products. In the above-mentioned first embodiment, the nitriding treatment and the denitrification treatment were performed, but in this embodiment, FeNiN is produced as an intermediate product when the nitriding treatment is completed. At this time, in order to reliably generate intermediate products by the nitriding treatment, before the nitriding treatment, a treatment for removing the oxide film formed on the surface of the FeNi disordered alloy is performed...

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Abstract

made with L1 0 It is a FeNi ordered alloy with an ordered structure, an order degree of 0.4 or more, and a coercive force of 87.5 kA / m or more. For example, by nitriding a disordered FeNi alloy followed by denitrification, L1 0 Type FeNi ordered alloy. For the FeNi disordered alloy, the volume average particle diameter is set at, for example, 45 nm or more. For the nitriding treatment, for example, the treatment temperature is set at 300° C. to 500° C., and the treatment time is set at 10 hours or more.

Description

[0001] Cross-references to related applications [0002] This application is based on Japanese Patent Application No. 2017-80025 filed on April 13, 2017, and the contents of the description are hereby incorporated by reference. technical field [0003] This disclosure relates to having L1 0 Ordered structure of type L1 0 type of FeNi ordered alloy and the use of such L1 0 A FeNi ordered alloy magnet composed of a FeNi ordered alloy. Background technique [0004] L1 0 Type (L1 0 type) FeNi (iron-nickel) ordered alloy is expected as a magnet material and a magnetic recording material that do not use rare earth metals or noble metals at all. Among them, the so-called L1 0 The type ordered structure is based on the face-centered cubic lattice and Fe and Ni are arranged in a layered crystal structure along the (001) direction. Such L1 0 Type ordered structures are seen in alloys such as FePt, FePd, and AuCu, and are usually obtained by heat-treating disordered alloys belo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/06B22F1/00B22F1/02B82Y30/00B82Y40/00C22C1/04C22C19/03C22C33/02C22C38/00H01F1/047B22F1/054B22F1/142B22F1/145
CPCB82Y30/00B82Y40/00C22C19/03C22C38/00C22C38/08C21D3/08C22C33/0285B22F2999/00C22C1/0433H01F1/068B22F1/142B22F1/145B22F1/054B22F2201/016B22F2201/01B22F2201/02C22C1/047
Inventor 后藤翔
Owner DENSO CORP