CN107610927A - A kind of high abrasion bonds samarium-cobalt magnet and preparation method thereof - Google Patents
A kind of high abrasion bonds samarium-cobalt magnet and preparation method thereof Download PDFInfo
- Publication number
- CN107610927A CN107610927A CN201710784814.2A CN201710784814A CN107610927A CN 107610927 A CN107610927 A CN 107610927A CN 201710784814 A CN201710784814 A CN 201710784814A CN 107610927 A CN107610927 A CN 107610927A
- Authority
- CN
- China
- Prior art keywords
- samarium
- magnet
- preparation
- cobalt magnet
- cobalt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The present invention provides a kind of high abrasion and bonds samarium-cobalt magnet and preparation method thereof, and using samarium-cobalt magnetic powder and thermoplastic resin binder as raw material, prepared by injection moulding bonds samarium-cobalt magnet；Then, by the way of liquid phase electrochemical deposition, one layer of diamond-like carbon film is wrapped up bonding samarium-cobalt magnet surface.The high abrasion bonding samarium-cobalt magnet freedom shape of preparation is big, and fragility reduces, and processing characteristics is good.Simultaneously because the diamond-like carbon film of magnet surface parcel, on the one hand can make magnet surface bright and clean smooth, coefficient of friction reduces, and on the other hand can increase surface strength, therefore anti-wear performance is significantly lifted.Preparation process condition is gentle, suitable for large-scale production.
Description
Technical field
The present invention relates to a kind of high abrasion to bond samarium-cobalt magnet and preparation method thereof, belongs to rare-earth permanent magnet field of magnets,
Bonding samarium-cobalt magnet prepared by more particularly to a kind of injection molding technique.
Background technology
Magnet can realize that mechanical energy mutually converts with electromagnetic energy, and SmCo has excellent magnetic characteristics, and resistance to elevated temperatures is good, in aviation
The various fields such as space flight, information electronics, the energy, health care play a significant role.Traditional samarium-cobalt magnet is mostly using sintering
Shaping, it is crisp and hard, easily ftractureed in process, be scaling-off, yield rate and processing precise degree are difficult to ensure that.Obdurability, anti-simultaneously
Pinking, impact resistance are also poor.Therefore, the samarium-cobalt magnet processing cost that prepared by sintering forming process is higher, is not suitable in essence
The occasion that degree, antidetonation and shock resistance require high uses.
It is by samarium-cobalt magnetic powder, binding agent mixing granulator, then by specific moulding process system in proportion to bond samarium-cobalt magnet
A kind of standby magnet.The moulding process of bonded permanent magnet is also varied, including compression molding, injection moulding, extrusion molding and pressure
Prolong shaping etc..Wherein injection molding bonded permanent magnet freedom shape is big, can be prepared into various complicated shapes, as thin slice, slice,
Tile-type, annular etc., integrated molding can be inlayed with other parts, without secondary operation, be shown in microelectromechanicpositioning splendid
Advantage, therefore obtain in recent years fast-developing.However, the product higher to magnetic property requirements, magnetic loading is very high, SmCo
Filling weight ratio reaches 94.5%-95%, and volume ratio reaches 70%-75% to magnetic in the composite, in so high packing ratio
Under, mixing granulator is difficult, magnetic it is dispersed poor.Mix it is uneven, shaping when, the temperature flowing of melt is also poor, system
The product surface obtained is coarse, and coefficient of friction is high.In addition, being combined together between magnetic against binding agent, active force is weak, intensity
It is low, it is easy to wear.Therefore bonded permanent magnet wearability is poor, and service life of the magnetic work under high friction environment is short.
Surface is occurred mainly in view of the frictional wear of workpiece, and when consume reaches to a certain degree, the essence of workpiece
Exactness declines, it is impossible to meets requirement.So the present invention's is for bonding samarium-cobalt magnet low intensity, rough surface, friction
The shortcomings that number is high, and anti-wear performance is bad, it is main to improve the surface property for bonding samarium-cobalt magnet.I.e. in the bonding samarium-cobalt magnet of preparation
On the basis of, wrap up one layer of intensity height, the smooth bright and clean and film of low-friction coefficient, so as to reduce magnet workpiece in magnet surface
Frictional wear in use.
The content of the invention
The present invention provides a kind of high abrasion and bonds samarium-cobalt magnet and preparation method thereof.With samarium-cobalt magnetic powder and thermoplasticity in invention
Resin is that raw material prepares SmCo bonded permanent magnet.Then, by the way of liquid phase electrochemical deposition, one is wrapped up on bonded permanent magnet surface
Layer diamond-like carbon film, improve the anti-wear performance of magnet surface.
To reach above-mentioned technique effect, the technical scheme of use is as follows：
Step 1：The preparation of pellet is injected, raw material magnetic, binding agent and various auxiliary agents are premixed in proportion, subsequent comminutor
High temperature melting mixing, uniform pellet is prepared；
Step 2：The preparation of samarium-cobalt magnet is bonded, pellet is added in injection (mo(u)lding) machine, the heated formation fluid of pellet,
Mould is injected into, is cooled and shaped and obtains SmCo bonded permanent magnet；
Step 3：SmCo bonded permanent magnet is surface-treated, and the bonding samarium-cobalt magnet of preparation carries out sanding and polishing with Buddha's warrior attendant gypsum,
Then it is cleaned by ultrasonic respectively with ethanol, acetone and removes surface impurity and greasy dirt；
Step 4：The preparation of diamond-like carbon film, liquid phase electrochemical deposition is using samarium-cobalt magnet as negative electrode, graphite or platinum
Silk is anode, and organic carbon source and water mixed solution are electrolyte.It is passed through operating voltage and is bonding one layer of samarium-cobalt magnet surface deposition
Diamond-like carbon film.Then dried with purifying water washing, obtain high abrasion and bond samarium-cobalt magnet.
Further, in the preparation for bonding samarium-cobalt magnet：Samarium-cobalt magnetic powder can be 1:5 type (SmCo5) and 2:17 types
(Sm2Co17) in one kind.Handled using preceding by fine grinding, wherein Sm2Co17Magnetic size controlling is in 20~50um, SmCo5Magnetic
Powder size controlling is in 5~10um.Binding agent is thermoplastic macromolecule resin, can be gathered for polyamide, polyphenylene sulfide, liquid crystal
Compound etc..Auxiliary agent includes plasticizer, lubricant and antioxidant etc..
Further, mixing granulator uses fervent comminution granulation.Compound is extruded in the state of melting, in atmosphere
Pelleter pelletizing after cooling.Pellet shape and uniform particle sizes prepared by this method, is suitable for injection molding technique.
Further, organic carbon source used is one kind in methanol, acetone during prepared by diamond-like carbon film.
Further, the electrode spacing of negative electrode and anode is 5~10cm in liquid phase electrochemical deposition pond, and operating voltage is
1000~2000V, electrolyte used are the mixed solution of organic carbon source and water, volume ratio VOrganic carbon source：VWaterControl is 1:2~1:8
Between.
Further, heat can be discharged in diamond-like carbon film preparation process causes sedimentation basin temperature to rise, to prevent
Organic carbon source volatilization in electrolyte, and ensure the stable progress of experiment, in experimentation by the way of water circulation cooling
30~60 DEG C of controlling reaction temperature.
Beneficial effects of the present invention are：First using samarium-cobalt magnetic powder and thermoplastic resin binder as raw material, using being injected into
Cohesive samarium-cobalt magnet is prepared in the method for type.The method for then using liquid phase electrochemical deposition, bonding samarium-cobalt magnet surface bag
The diamond-like carbon film of one layer of high-strength wearable is wrapped up in, prepares a kind of bonding samarium-cobalt magnet of high abrasion.With high-sintering process system
Standby brittle property samarium-cobalt magnet is compared, and the magnet has bonded permanent magnet feature, and as freedom shape is big, fragility reduces, processability
Can good, easily prepared high-precision magnetic work.Simultaneously because the presence of surface diamond-like carbon film, on the one hand can make magnetic
Body any surface finish is smooth, and coefficient of friction reduces, and on the other hand can increase surface strength, therefore anti-wear performance is significantly carried
Rise.Whole process conditions are gentle simultaneously, suitable for large-scale production.
Brief description of the drawings
Fig. 1 is that the high abrasion prepared in embodiment 1 bonds samarium-cobalt magnet skin-friction coefficient figure；
Fig. 2 is that the high abrasion prepared in embodiment 2 bonds samarium-cobalt magnet skin-friction coefficient figure.
Embodiment
Embodiment 1
A kind of high abrasion bonds samarium-cobalt magnet and preparation method thereof, the described method comprises the following steps：
1) by SmCo5Raw material carries out fine grinding processing, prepares particle diameter in 5~10um magnetics；
2) it is binding agent with thermoplastic resin nylon 12, magnetic, thermoplastic resin binder, auxiliary agent are according to mass ratio 95:
4:1 is well mixed in high-speed mixer, melting extrusion in subsequent double screw extruder, cooling and pelletizing in air, magnetic is made
Body pellet；
3) pellet is injection moulded under the conditions of 280 DEG C, and 20 × 15 × 2mm is made3Bonding samarium-cobalt magnet sample；
4) carries out sanding and polishing to bonding samarium-cobalt magnet specimen surface with 1.5um Buddha's warrior attendant gypsum, then use respectively ethanol,
Acetone is cleaned by ultrasonic 15min；
5) in liquid phase electrochemical deposition pond, polishing magnet is anode, and carbon electrode is negative electrode, volume ratio 1:5 methanol,
Water mixed solution is electrolyte, keeps two electrode spacing 8cm, is passed through voltage 1200V reaction 6h, the viscous of high abrasion is prepared
Tie samarium-cobalt magnet.Use recirculated water cooling measure in course of reaction, keep in sedimentation basin temperature between 50~60 DEG C.
Embodiment 2
A kind of high abrasion bonds samarium-cobalt magnet and preparation method thereof, the described method comprises the following steps：
1) by Sm2Co17Raw material carries out fine grinding processing, prepares particle diameter in 20~50um magnetics；
2) it is binding agent with thermoplastic resin nylon 12, magnetic, binding agent, auxiliary agent are according to mass ratio 95:4:1, at a high speed
It is well mixed in mixer, the melting extrusion in double screw extruder, cooling and pelletizing in air, magnet pellet is made；
3) pellet is injection moulded under the conditions of 280 DEG C of temperature, and obtained 20 × 15 × 2mm is made3Bonding samarium-cobalt magnet examination
Sample；
4) sanding and polishing is carried out to magnetic sample surface with 1.5um Buddha's warrior attendant gypsum, then respectively with ethanol, acetone ultrasound
Clean 15min；
5) in liquid phase electrochemical deposition pond, polishing magnetic sample is anode, and carbon electrode is negative electrode, volume ratio 1:The third of 2
Ketone, water mixed solution are electrolyte, keep two electrode spacing 8cm, are passed through voltage 1500V reaction 4h, high abrasion is prepared
Bond samarium-cobalt magnet.Use recirculated water cooling measure in course of reaction, keep in sedimentation basin temperature between 45~55 DEG C.
Using the frictional behaviour of high abrasion bonded permanent magnet in CERT micro tribology system measurement embodiments, and in corresponding embodiment
The bonding samarium-cobalt magnet for not wrapping up DLC film is compared.Experiment parameter:Fricting couple piece is Φ 6 WC steel balls, is transported
For flowing mode to reciprocatingly slide, it is room temperature (25~30 to load as 200mN, sliding speed 0.5mm/s, sliding distance 6mm, temperature
DEG C), relative humidity 40%-45%.The coefficient of friction of record magnet per 50min.Gained test result is as shown below：
In Fig. 1,2, black lines are the when m- friction coefficient curve that high abrasion bonds samarium-cobalt magnet, and red lines is not
M- friction coefficient curve when having the bonded permanent magnet of parcel diamond-like carbon film.It can be drawn from figure to draw a conclusion：
In Fig. 1, coefficient of friction is higher about when embodiment 1 starts without the bonded permanent magnet of parcel diamond-like carbon film
1.3,50min coefficient of friction decline, and are then maintained at 1.0~1.2 or so.High abrasion bonds samarium-cobalt magnet in fraction time
In the range of 0~400min, coefficient of friction is 0.1 or so, when fraction time is more than 400min, because surface diamond-like-carbon is thin
The abrasion of film, coefficient of friction increase, is ultimately maintained between 1.0~1.2.
In Fig. 2, coefficient of friction is higher about when embodiment 2 starts without the bonded permanent magnet of parcel diamond-like carbon film
1.5, preceding 200min coefficient of friction declines, and is then maintained at 1.2 or so.High abrasion bonds samarium-cobalt magnet in fraction time 0
In the range of~300min, coefficient of friction is 0.1 or so, when fraction time is more than 300min, due to surface diamond-like carbon film
Abrasion, coefficient of friction increase, be ultimately maintained at 1.2 or so.Therefore, in injection molding cohesive SmCo in two case study on implementation
Magnet surface wraps up the wear-resisting diamond-like carbon film of a floor height, and the high abrasion being prepared bonds the friction on samarium-cobalt magnet surface
Coefficient is relatively low, has preferable crocking resistance.
The concrete mode of the present invention is described in detail above example, but is intended only as example, and the present invention is unlimited
It is formed on particular embodiments described above.To those skilled in the art, it is any the present invention is carried out equivalent modifications and
Substitute also all among scope of the invention.Therefore, in the impartial conversion done without departing from the spirit and scope of the invention and
Modification, should all cover within the scope of the present invention.
Claims (6)
1. a kind of high abrasion bonds samarium-cobalt magnet and preparation method thereof, it is characterised in that the high abrasion bonded permanent magnet, first with
Samarium-cobalt magnetic powder and thermoplastic resin binder are raw material, and prepared by injection moulding bonds samarium-cobalt magnet；Then, using liquid phase electrochemistry
The mode of deposition, one layer of diamond-like carbon film is wrapped up bonding samarium-cobalt magnet surface, improves the anti-wear performance of magnet surface；Prepare
Step is：
Step 1：The preparation of pellet is injected, raw material magnetic, binding agent and various auxiliary agents are premixed in proportion, it is high in subsequent comminutor
Warm melting mixing, uniform pellet is prepared；
Step 2：The preparation of samarium-cobalt magnet is bonded, pellet is added in injection (mo(u)lding) machine, the heated formation fluid of pellet, is injected
Enter mould, be cooled and shaped and obtain SmCo bonded permanent magnet；
Step 3：SmCo bonded permanent magnet is surface-treated, and the bonding samarium-cobalt magnet of preparation carries out sanding and polishing with Buddha's warrior attendant gypsum, then
It is cleaned by ultrasonic respectively with ethanol, acetone and removes surface impurity and greasy dirt；
Step 4：The preparation of diamond-like carbon film, using samarium-cobalt magnet as negative electrode, graphite or platinum filament are liquid phase electrochemical deposition
Anode, organic carbon source and water mixed solution are electrolyte；It is passed through operating voltage and is bonding samarium-cobalt magnet surface one layer of eka-gold of deposition
Hard rock C film；Finally dried with purifying water washing, obtain high abrasion and bond samarium-cobalt magnet.
2. according to claim 1, it is characterised in that it can be 1 that samarium used, which bores magnetic,:5 type (SmCo5) and 2:17 types
(Sm2Co17) in one kind, use it is preceding by fine grinding handle, wherein Sm2Co17Magnetic size controlling is in 20~50um, SmCo5Magnetic
Powder size controlling is in 5~10um；Thermoplastic macromolecule resin's binding agent, it is in polyamide, polyphenylene sulfide, liquid crystal polymer
One kind；Auxiliary agent includes but is not limited to plasticizer, lubricant and antioxidant.
3. according to claim 1, it is characterised in that the preparation for injecting pellet uses fervent comminution granulation.
4. according to claim 1, it is characterised in that organic carbon source used is methanol, third in prepared by diamond-like carbon film
One kind in ketone.
5. according to claim 1, it is characterised in that the electrode spacing of liquid phase electrochemical deposition negative electrode and anode be 5~
10cm, operating voltage are 1000~2000V, and electrolysis temperature is 30~60 DEG C, and electrolyte used is the mixing of organic carbon source and water
Solution, volume ratio VOrganic carbon source：VWaterControl is 1:2~1:Between 8, reaction time 2-10h.
6. class according to claim 1, it is characterised in that using the side of water circulation cooling in diamond carbon membrane-film preparation process
Formula controlling reaction temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710784814.2A CN107610927A (en) | 2017-09-04 | 2017-09-04 | A kind of high abrasion bonds samarium-cobalt magnet and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710784814.2A CN107610927A (en) | 2017-09-04 | 2017-09-04 | A kind of high abrasion bonds samarium-cobalt magnet and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107610927A true CN107610927A (en) | 2018-01-19 |
Family
ID=61057362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710784814.2A Pending CN107610927A (en) | 2017-09-04 | 2017-09-04 | A kind of high abrasion bonds samarium-cobalt magnet and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107610927A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1162827A (en) * | 1995-11-06 | 1997-10-22 | 精工爱普生株式会社 | Rare earth bonded magnet, rare earth magnetic composition, and method for manufacturing rare earth bonded magnet |
| CN1965109A (en) * | 2004-04-15 | 2007-05-16 | 株式会社新王磁材 | Method for imparting resistance to hydrogen to article |
| CN102246249A (en) * | 2008-12-12 | 2011-11-16 | 爱知制钢株式会社 | Rare earth-based bonded magnet |
| CN103295770A (en) * | 2013-06-25 | 2013-09-11 | 李超 | Method for preparing composite bonded permanent magnet |
-
2017
- 2017-09-04 CN CN201710784814.2A patent/CN107610927A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1162827A (en) * | 1995-11-06 | 1997-10-22 | 精工爱普生株式会社 | Rare earth bonded magnet, rare earth magnetic composition, and method for manufacturing rare earth bonded magnet |
| CN1965109A (en) * | 2004-04-15 | 2007-05-16 | 株式会社新王磁材 | Method for imparting resistance to hydrogen to article |
| CN102246249A (en) * | 2008-12-12 | 2011-11-16 | 爱知制钢株式会社 | Rare earth-based bonded magnet |
| CN103295770A (en) * | 2013-06-25 | 2013-09-11 | 李超 | Method for preparing composite bonded permanent magnet |
Non-Patent Citations (1)
| Title |
|---|
| 杜景永等: ""不锈钢上液相电沉积类金刚石碳膜"", 《电化学》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107828344B (en) | One-dimensional micro-nano particle/epoxy resin composite adhesive film arranged along Z direction and preparation method thereof | |
| CN101465188B (en) | Flexible rare-earth cementing magnet and method of manufacturing the same | |
| CN105504763B (en) | Whisker reinforcement polyether-ether-ketone composite material and preparation method thereof | |
| CN105820567B (en) | A kind of graphene modified polyimide composite material and its application | |
| CN104109343A (en) | High-flowability plastic composite powder material and preparation method thereof | |
| CN102942719A (en) | Magnetic composite material for multistage magnetic encoder and preparation method thereof | |
| CN102775755A (en) | Polyaryl ether nitrile (PEN) and carbonyl iron powder (Fe(CO)5) composite magnetic material and preparation method thereof | |
| CN111534095A (en) | ZnS quantum dot/MXene/polymer-based super-wear-resistant self-lubricating composite material and preparation method and application thereof | |
| CN105820562B (en) | A kind of selective laser sintering electroconductive nylon composite powder and preparation method thereof | |
| CN103469123A (en) | Manufacturing method of carbon fiber-reinforced copper-based pantograph slide plate material | |
| CN107978411A (en) | A kind of regenerated bonded magnetic material and preparation method thereof | |
| CN107610927A (en) | A kind of high abrasion bonds samarium-cobalt magnet and preparation method thereof | |
| Zhang et al. | Effect of silane coupling agents on flowability and compressibility of compound for bonded NdFeB magnet | |
| CN105622109A (en) | Preparation method of silicon nitride ceramic ball and silicon nitride ceramic ball | |
| CN102943198B (en) | Preparation method of double-size silicon carbide particle hybrid reinforced magnesium matrix composite material | |
| CN102029394A (en) | Method for preparing high-performance halogen-free environment-friendly rubber-plastic NdFeB (neodymium, iron and boron) extruded magnetic strip and magnetic strip | |
| CN108641349A (en) | A kind of thermal diffusivity magnetic plastics and preparation method thereof | |
| Alo et al. | Processing methods for conductive polymer composite bipolar plates: Effect on plate quality and performance | |
| CN107312326A (en) | Graphene microchip/Nylon Nanocomposite, its preparation method and application | |
| CN109867956B (en) | Rare earth and graphene oxide synergistically modified polyimide nanocomposite, application and preparation method | |
| CN104616882A (en) | Anisotropic bonded magnet and production process thereof | |
| CN1834010A (en) | Method of microwave synthetizing nano powder of tungsten carbide | |
| CN106543712A (en) | A kind of preparation method of the PA-12 composites for 3D printing | |
| CN104599834A (en) | Manufacturing method for thermoplastic compound macromolecule bonded magnet | |
| CN107540902A (en) | A kind of preparation method of flexible neodymium iron boron rubber magnet composite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180119 |