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A kind of preparation method of high-performance anisotropic nanocomposite magnet

An anisotropic, nano-composite technology, applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve problems such as unfavorable thermal deformation, improved magnetic properties, and high process requirements, to suppress interface reactions and prevent interface diffusion , The effect of simple preparation process

Active Publication Date: 2017-12-05
CHANGSHU INNOVATION CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main method of preparing nanocrystalline permanent magnets is rapid sintering, including hot pressing or spark plasma sintering, which needs to be completed under high vacuum and high temperature conditions. The process requirements are high, and it is easy to form coarse grain regions, oxidation phenomena or interface diffusion, which is not conducive to subsequent Improved thermal deformation and magnetic properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) According to Nd 9.5 PR 4 Fe 80.7 B 5.8 Alloy composition Weigh the raw materials for batching, vacuum melt the prepared mixed raw materials, and then quickly quench them into Nd 9.5 PR 4 Fe 80.7 B 5.8 Alloy quick quenching belt;

[0026] 2) According to SmCo 5 The alloy composition weighs the raw materials for batching, vacuum melts the prepared mixed raw materials, and then quickly quenches them into SmCo 5 Alloy quick quenching belt;

[0027] 3) Add Nd 9.5 PR 4 Fe 80.7 B 5.8 Alloy Quick Quenching Strip and SmCo 5 Alloy quenching belts are subjected to high-energy ball milling respectively to make corresponding nanocrystalline alloy powders;

[0028] 4) Add Nd 9.5 PR 4 Fe 80.7 B 5.8 Nanocrystalline alloy powder with SmCo 5 The nanocrystalline alloy powder is mixed at a mass ratio of 9:1 to obtain a uniformly mixed composite powder;

[0029] 5) Pack the composite powder into the molding die, and pre-compact with the molding head;

[0030] 6) Plac...

Embodiment 2

[0035] 1) According to Nd 11.9 Tb 0.1 Fe 79 co 3 B5 Cu 1 Alloy composition Weigh the raw materials for batching, vacuum melt the prepared mixed raw materials, and then quickly quench them into Nd 11.9 Tb 0.1 Fe 79 co 3 B 5 Cu 1 Alloy quick quenching belt;

[0036] 2) According to Sm 2 co 17 The alloy composition weighs the raw materials for batching, vacuum melts the prepared mixed raw materials, and then quickly quenches them into SmCo 5 Alloy quick quenching belt;

[0037] 3) Add Nd 11.9 Tb 0.1 Fe 79 co 3 B 5 Cu 1 Alloy Quick Quenching Strip and Sm 2 co 17 Alloy quenching belts are subjected to high-energy ball milling respectively to make corresponding nanocrystalline alloy powders;

[0038] 4) Add Nd 11.9 Tb 0.1 Fe 79 co 3 B 5 Cu 1 Nanocrystalline alloy powder with Sm 2 co 17 The nanocrystalline alloy powder is mixed at a mass ratio of 1:9 to obtain a uniformly mixed composite powder;

[0039] 5) Pack the composite powder into the molding die,...

Embodiment 3

[0045] 1) According to Nd 15 Dy 1 Fe 77.4 B 6.5 Nb 0.1 Alloy composition Weigh the raw materials for batching, vacuum melt the prepared mixed raw materials, and then quickly quench them into Nd 15 Dy 1 Fe 77.4 B 6.5 Nb 0.1 Alloy quick quenching belt;

[0046] 2) According to SmCo 7 The alloy composition weighs the raw materials for batching, vacuum melts the prepared mixed raw materials, and then quickly quenches them into SmCo 7 Alloy quick quenching belt;

[0047] 3) Add Nd 15 Dy 1 Fe 77.4 B 6.5 Nb 0.1 Alloy Quick Quenching Strip and SmCo 7 Alloy quenching belts are subjected to high-energy ball milling respectively to make corresponding nanocrystalline alloy powders;

[0048] 4) Add Nd 15 Dy 1 Fe 77.4 B 6.5 Nb 0.1 Nanocrystalline alloy powder with SmCo 7 The nanocrystalline alloy powder is mixed at a mass ratio of 7:3 to obtain a uniformly mixed composite powder;

[0049] 5) Pack the composite powder into the molding die, and pre-compact with the mol...

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Abstract

The invention discloses a preparation method for a high-performance anisotropic nano-composite magnet, and relates to the preparation technology for a permanent magnet material. The anisotropic nano-composite magnet is prepared by the steps of obtaining NdFeB and SmCo alloy nanocrystal powder through smelting, rapid quenching and high-energy ball milling processes; then uniformly mixing the NdFeB and SmCo alloy nanocrystal powder based on proportions to obtain uniform composite powder; loading the composite powder into a die and pre-compressing the die by a molding pressing head; setting an absorbing layer and a constraint layer, and fixing the absorbing layer and the constraint layer to a working table; finally, performing high-speed compressing and molding of the composite powder under magnetic orientation through a laser induced high-voltage impact wave force effect impact pressuring head, and then performing thermal deformation to reinforce magnetic texture to obtain the anisotropic nano-composite magnet. The preparation method is simple in process, easy to operate, and suitable for large-scale batch production.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet material preparation, and in particular relates to a preparation method of a high-performance anisotropic nanocomposite magnet. Background technique [0002] Permanent magnet materials have been widely used in motors, microwave communications, loudspeakers, transportation, instrumentation and other fields, and have become an important basis for promoting the development of various high-tech and emerging industries. There are many types of permanent magnet materials, with large performance differences, each with its own advantages and disadvantages, and the high-tech field has increasingly stringent requirements for the comprehensive performance of magnets. Therefore, magnets with high comprehensive performance have become one of the current research hotspots, and have attracted extensive attention from researchers at home and abroad. [0003] Neodymium iron boron (NdFeB) permanent magnet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02
CPCH01F41/0266H01F41/0273
Inventor 崔熙贵王兴华崔承云阴冠超夏传达方翠彭希超
Owner CHANGSHU INNOVATION CERAMICS
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