CN204288996U - A kind of Sintered NdFeB magnet - Google Patents
A kind of Sintered NdFeB magnet Download PDFInfo
- Publication number
- CN204288996U CN204288996U CN201420783193.8U CN201420783193U CN204288996U CN 204288996 U CN204288996 U CN 204288996U CN 201420783193 U CN201420783193 U CN 201420783193U CN 204288996 U CN204288996 U CN 204288996U
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- neodymium
- coating
- magnetic body
- nickel
- iron boron
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Abstract
Sintered NdFeB magnet; comprise N52 neodymium iron boron magnetic body body; it is characterized in that; one deck N45 neodymium iron boron magnetic body is had at the outer layer covers of described N52 neodymium iron boron magnetic body body; described N45 neodymium-iron-boron external body is nickel-phosphorus coating; nickel-phosphorus coating outside is nickel cobalt coating, and nickel cobalt coating outside is Corvic protective layer.Described nickel-phosphorus coating thickness is 10 μm ~ 12 μm.Described nickel cobalt thickness of coating is 5 μm ~ 7 μm.Described Corvic protective layer thickness is 25 μm ~ 30 μm.Described N45 neodymium-iron-boron body thickness is 5mm ~ 10mm.
Description
Technical field
The utility model belongs to Material Field, is specifically related to a kind of neodymium-iron-boron magnetic material.
Background technology
Neodymium-iron-boron magnetic material, as the latest result of rare earth permanent-magnetic material development, is called as due to the magnetic property of its excellence " magnetic king ".Neodymium-iron-boron magnetic material is praseodymium neodymium metal, the alloy of ferro-boron etc.Also known as magnet steel.Neodymium iron boron has high magnetic energy product and strong power, the advantage of high-energy-density makes Nd-Fe-Bo permanent magnet material be applied widely in modern industry and electronic technology simultaneously, thus makes the miniaturization of the equipment such as instrument and meter, electroacoustic motor, magnetic separation magnetization, lightweight, slimming become possibility.The advantage of neodymium iron boron is that cost performance is high, the mechanical property that tool is good; Weak point is that Curie point is low, and temperature characterisitic is poor, and is easy to dusting corrosion, and surface treatment method must be taked to make it to be improved by its chemical composition of adjustment, just can reach the requirement of practical application.
Neodymium in Nd-Fe-B permanent magnet is a kind of rare earth element, and chemism is very strong, and its standard equilibration current potential is-2.431V, and easily oxidized in atmosphere, corrosion resistance is poor.And the electrochemical potentials of rich B phase, rich Nd phase, Nd2Fe14B phase is different in sintered Nd-Fe-B permanent magnetic material, matrix Nd2Fe14B phase is defeated by by the electrode potential of rich Nd phase, the rich neodymium phase of One's name is legion on crystal boundary, in damp and hot environment, form corrosion micro cell, constitute the micro cell group that many large negative electrodes (Nd2Fe14B phase) form with primary anode (Nd phase).First rich Nd phase is corroded, and form intercrystalline corrosion, time serious, the oxide and the hydride that produce a large amount of Nd make material efflorescence, thus cause magnetic property to decline.Therefore, generally all will carry out coating process to surface of Nd-Fe-B permanent magnet, the coating technology used at present has: the technology such as electroplated Ni layer, plating Zn layer, combination plating NiCuNi layer, Electroless Plating Ni layer, electrophoresis and vacuum sputtering aluminium film.
The face coat of the Nd-Fe-B permanent magnet adopting said method to obtain, can not meet the anticorrosion of Nd-Fe-B permanent magnet and serviceability completely, limit the application that neodymium iron boron magnetic body has the field of requirements at the higher level in the corrosion resistances such as wind-powered electricity generation, stability.
Summary of the invention
It is strong that the purpose of this utility model is to provide a kind of corrosion resistance, the Sintered NdFeB magnet that magnetic property is good.
Sintered NdFeB magnet of the present utility model; Sintered NdFeB magnet; comprise N52 neodymium iron boron magnetic body body; one deck N45 neodymium iron boron magnetic body is had at the outer layer covers of described N52 neodymium iron boron magnetic body body; described N45 neodymium-iron-boron external body is nickel-phosphorus coating; nickel-phosphorus coating outside is nickel cobalt coating, and nickel cobalt coating outside is Corvic protective layer.
Described neodymium iron boron magnetic body, is characterized in that described nickel-phosphorus coating thickness is 10 μm ~ 12 μm.
Described nickel cobalt thickness of coating is 5 μm ~ 7 μm.
Described Corvic protective layer thickness is 25 μm ~ 30 μm.
Described N45 neodymium-iron-boron body thickness is 5mm ~ 10 m m.
Wherein, the physical dimension of neodymium iron boron magnetic body is not limit.
The utility model Sintered NdFeB magnet, mainly strengthens the corrosion resistance of neodymium iron boron magnetic body, keeps the magnetic property that neodymium iron boron is lasting.And the application expanding neodymium iron boron magnetic body is invented.Compared with prior art; the beneficial effects of the utility model are: have one deck N45 neodymium iron boron magnetic body by the outer layer covers of N52 neodymium iron boron magnetic body body; improve the magnetic property of NdFeB material; by at N45 neodymium iron boron magnetic body outer wrap nickel-phosphorus coating; nickel-phosphorus coating outer wrap nickel cobalt coating, nickel cobalt coating outer wrap Corvic protective layer.Form the composite protection layer of three layers, reach best anticorrosion effect.Improve reliability and the service life of rare earth permanent magnet device, the salt mist test of coating can reach more than 200 hours.
Accompanying drawing explanation
Fig. 1 is the utility model Sintered NdFeB magnet structural representation.
Embodiment
The utility model is described in further detail for embodiment plan given below; but can not be interpreted as it is restriction to the utility model protection range; those skilled in the art to nonessential improvement and adjustment more of the present utility model, still belong to protection range of the present utility model according to the utility model content.
As shown in Fig. 1; Sintered NdFeB magnet; comprise N52 neodymium iron boron magnetic body body 1; one deck N45 neodymium iron boron magnetic body 2 is had at the outer layer covers of described N52 neodymium iron boron magnetic body body 1; described N45 neodymium iron boron magnetic body 2 outside is nickel-phosphorus coating 3; nickel-phosphorus coating 3 outside is nickel cobalt coating 4, and nickel cobalt coating 4 outside is Corvic protective layer 5.Described nickel-phosphorus coating 3 thickness is 10 μm ~ 12 μm.Described nickel cobalt coating 4 thickness is 5 μm ~ 7 μm.Described Corvic protective layer 5 thickness is 25 μm ~ 30 μm.Described N45 neodymium iron boron magnetic body 2 thickness is 5mm ~ 10 m m.
Claims (5)
1. a Sintered NdFeB magnet; comprise N52 neodymium iron boron magnetic body body; it is characterized in that; one deck N45 neodymium iron boron magnetic body is had at the outer layer covers of described N52 neodymium iron boron magnetic body body; described N45 neodymium-iron-boron external body is nickel-phosphorus coating; nickel-phosphorus coating outside is nickel cobalt coating, and nickel cobalt coating outside is Corvic protective layer.
2. neodymium iron boron magnetic body according to claim 1, is characterized in that described nickel-phosphorus coating thickness is 10 μm ~ 12 μm.
3. neodymium iron boron magnetic body according to claim 1, is characterized in that described nickel cobalt thickness of coating is 5 μm ~ 7 μm.
4. neodymium iron boron magnetic body according to claim 1, is characterized in that described Corvic protective layer thickness is 25 μm ~ 30 μm.
5. neodymium iron boron magnetic body according to claim 1, is characterized in that described N45 neodymium-iron-boron body thickness is 5mm ~ 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420783193.8U CN204288996U (en) | 2014-12-14 | 2014-12-14 | A kind of Sintered NdFeB magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420783193.8U CN204288996U (en) | 2014-12-14 | 2014-12-14 | A kind of Sintered NdFeB magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204288996U true CN204288996U (en) | 2015-04-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420783193.8U Expired - Fee Related CN204288996U (en) | 2014-12-14 | 2014-12-14 | A kind of Sintered NdFeB magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204288996U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109208048A (en) * | 2018-08-08 | 2019-01-15 | 北京麦戈龙科技有限公司 | Coating structure of Sintered NdFeB magnet and preparation method thereof |
| CN112837884A (en) * | 2021-02-23 | 2021-05-25 | 包头麦戈龙科技有限公司 | Electroplated layer structure for improving fracture force of sintered neodymium-iron-boron sheet magnet and preparation method |
-
2014
- 2014-12-14 CN CN201420783193.8U patent/CN204288996U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109208048A (en) * | 2018-08-08 | 2019-01-15 | 北京麦戈龙科技有限公司 | Coating structure of Sintered NdFeB magnet and preparation method thereof |
| CN112837884A (en) * | 2021-02-23 | 2021-05-25 | 包头麦戈龙科技有限公司 | Electroplated layer structure for improving fracture force of sintered neodymium-iron-boron sheet magnet and preparation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20171214 |
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| CF01 | Termination of patent right due to non-payment of annual fee |