Sintered SmCo Magnets

Group SmCo Magnets
Min. Order 1 piece
Terms of Payment all
Update Time 2018-12-20
Item specifics
MaterialSm2Co17 ,SmCo5
ShapeMain Disc, but Block or Rectangular or Cuboid, Ring, Cylinder, Arc and Irregular shape are also available
CoatingNi, Ni-Cu-Ni, Electroless Nickel, Zinc, Colored Zinc, Epoxy
Magnetized directionAxially or Diametrical Magnetized, but Thickness, Multipoles and Radial magnetization are also available
CertificateISO/TS 16949, ISO9001, ISO14001, RoHS, REACH
PackingStandard sea or air packing, such as carton, wooden box, pallet etc
  • Description
  • Product review

SmCo 1:5

As the nomination indicates, the samarium–cobalt 1:5 magnet alloys (generally written as SmCo5, or SmCo 1:5) have one atom of rare earth samarium per five atoms of cobalt. By weight this magnet alloy will typically contain 36% samarium with the balance cobalt. Sometimes Prasedymium is alloyed to increase the remanence. The energy products of these samarium–cobalt alloys range from 16 MGOe to 25 MGOe, that is, approx. 128 - 200 kJ/m3. Contrary to SmCo 2:17 magnets, the 1:5 magnets are relatively easy to magnetize and saturation magnetization can be achieved with a moderate magnetizing field. Therefore, 1:5 magnets are easier to calibrate to a specific magnetic field than the SmCo 2:17 magnets.

SmCo 2:17

These alloys (written as Sm2Co17, or SmCo Series 2:17) are age-hardened with a composition of two atoms of rare-earth samarium per 13–17 atoms of transition metals (TM). The TM content is rich in cobalt, but contains also other metals such as iron and copper. Other elements like Zirkonium and Hafnium etc. may be added in small quantities to achieve better heat treatment response. The maximum energy products of these alloys range from 20 to 32 MGOe, what is about 160-260 kJ/m3. These alloys have the best reversible temperature coefficient of remanence of all rare-earth alloys, typically being -0.03%/°C.

In Sm2Co17 magnets, the coercivity mechanism is based on domain wall pinning (in contrary to SmCo 1:5 and NdFeB where it’s nucleation). The purpose of alloying and heat treatment is to create a microstructure inside the magnets which impede the domain wall motion and thereby resist the magnetization reversal process.

  Samarium Cobalt Magnets are among the second most common rare earth magnets.Grades and shapes of SmCo magnets are varied, so they can suit a wide variety of application requirements. Magnets can be shaped and sized in any configuration you can imagine in our custom machining shop. The maximum grade of a SmCo magnet is 32MGOe.

Common applications include use in the automotive, marine, medical, aerospace, military, industrial automation and similar industries where high performance is critical. Think pumps, motors, machinery, medical devices and so on.

Safety procedures are important to maintain, as these magnets can snap together with great force. They are also hard and brittle, and can shatter into sharp, dangerous objects. They have been known to chip when snapping together from large distances, but also when dropped at an unfortunate angle. Make sure all personnel handling these magnets can handle with care.

Compared with Neodymium?

SmCo magnets are not as high in energy as Neodymium magnets, but they excel in high temperature conditions where Neodymium magnets do not.SmCo magnets are the more expensive of the two, but is by far the best product when power and high temperature resistance is required.

                      Magnets property parameters of Sintered SmCo5

牌号

Grade

剩磁 Br

Residual Induction (Br)

磁感矫顽力

Coercive Force
(Hcb)

内禀矫顽力

Intrinsic Coercive Force
(Hcj)

最大磁能积 (BH)max

Max Energy Product (BH)max

居里温度

Curie temperature(Tc)

工作温度

Working Temperature

(Tw)

剩磁可逆温度系数

Temperature CoefficientT.C.αBr

内禀矫顽力可逆温度系数

Temperature CoefficientT.C.α(HcJ)

TYP

Min

Min

Min

TYP

Min

TYP

MAX

TYP

TYP

[T]

[T]

[kA/m]

[kA/m]

[kJ/m3]

[]

[]

[%/]

[%/]

[KGs]

[KGs]

[KOe]

[KOe]

[MGOe]

SmCo16

0.83

0.81

620

1274

127

119

750

250

-0.04

-0.3

8.3

8.1

7.8

16

16

15

SmCo18

0.87

0.84

645

1274

143

135

750

250

-0.04

-0.3

8.7

8.4

8.1

16

18

17

SmCo20

0.92

0.89

680

1274

159

151

750

250

-0.04

-0.3

9.2

8.9

8.5

16

20

19

SmCo22

0.95

0.93

710

1274

167

159

750

250

-0.04

-0.3

9.5

9.3

8.9

16

21

20

SmCo24

0.98

0.96

730

1194

183

175

750

250

-0.04

-0.3

9.8

9.6

9.2

15

23

22

            

                               Magnets property parameters of Sintered Sm2Co17

 

Grade

Residual Induction (Br)

Coercive Force
(Hcb)

Intrinsic Coercive Force
(Hcj)

Max Energy Product (BH)max

Curie temperature(Tc)

Working Temperature

(Tw)

Temperature CoefficientT.C.αBr

Temperature CoefficientT.C.α(HcJ)

TYP

Min

Min

Min

TYP

Min

TYP

TYP

TYP

TYP

[T]

[T]

[kA/m]

[kA/m]

[kJ/m3]

[]

[]

[%/]

[%/]

[KGs]

[KGs]

[KOe]

[KOe]

[MGOe]

   SmCo24H

0.99

0.96

692

1990

183

175

820

350

-0.03

-0.2

9.9

9.6

8.7

25

23

22

   SmCo24

0.99

0.96

692

1433

183

175

820

300

-0.03

-0.2

9.9

9.6

8.7

18

23

22

  SmCo26H

1.04

1.02

750

1990

199

191

820

350

-0.03

-0.2

10.4

10.2

9.4

25

25

24

   SmCo26

1.04

1.02

750

1433

199

191

820

300

-0.03

-0.2

10.4

10.2

9.4

18

25

24

  SmCo26M

1.04

1.02

676

796-1273

199

191

820

300

-0.03

-0.2

10.4

10.2

8.5

10-16

25

24

  SmCo26L

1.04

1.02

413

438-796

199

191

820

250

-0.03

-0.2

10.4

10.2

5.2

5.5-10

25

24

  SmCo28H

1.07

1.04

756

1990

215

207

820

350

-0.03

-0.2

10.7

10.4

9.5

25

27

26

  SmCo28

1.07

1.04

756

1433

215

207

820

300

-0.03

-0.2

10.7

10.4

9.5

18

27

26

 SmCo28M

1.07

1.04

676

796-1273

215

207

820

300

-0.03

-0.2

10.7

10.4

8.5

10-16

27

26

  SmCo28L

1.07

1.04

413

438-796

215

207

820

250

-0.03

-0.2

10.7

10.4

5.2

5.5-10

27

26

  SmCo30H

1.1

1.08

788

1990

239

222

820

350

-0.03

-0.2

11.0

10.8

9.9

25

30

28

  SmCo30

1.1

1.08

788

1433

239

222

820

300

-0.03

-0.2

11.0

10.8

9.9

18

30

28

  SmCo30M

1.1

1.08

676

796-1273

239

222

820

300

-0.03

-0.2

11.0

10.8

8.5

10-16

30

28

  SmCo30L

1.1

1.08

413

438-796

239

222

820

250

-0.03

-0.2

11.0

10.8

5.2

5.5-10

30

28

  SmCo32

1.12

1.1

796

1433

255

230

820

300

-0.03

-0.2

11.2

11.0

10

18

32

29

  SmCo32M

1.12

1.1

676

796-1273

255

230

820

300

-0.03

-0.2

11.2

11.0

8.5

10-16

32

29

  SmCo32L

1.12

1.1

413

438-796

255

230

820

250

-0.03

-0.2

11.2

11.0

5.2

5.5-10

32

29

Both the types of SmCo magnets are manufacture by powder metallurgy. The raw materials are melted in a furnace and cast into thin sheet or ingot. The material is crushed and then pulverized by ball milling or by jet milling. The powder is then oriented with external magnetic field and pressed into blocks or near net shape. Final properties and density are achivied in following sintering and heat treatments. The blocks are then cut to shape and magnetized.


The typical physical properties of SmCo magnets are given by the table below. These values must not be understood as quaranteed, as the properties are not controlled in manufacture. SmCo magnets are fragile and must always handled  with care and never used as load carrying elements in a design. 

 


    Loading...