hydrogen embrittlement of ndfeb magnets...magnetic materials r&d center hydrogen exposure test...
Post on 06-Apr-2020
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Magnetic Materials R&D Center
Characteristics of Hydrogen Absorption Characteristics of Hydrogen Absorption on RE Magnetson RE Magnets
NdFeB 2-17SmCo
1 0 - 3
1 0 - 2
1 0 - 1
1 0 0
1 0 1
0 0 . 1 0 . 2 0 . 3 0 . 4
Pres
sure
/ M
Pa
wt % H2
1 0 - 3
1 0 - 2
1 0 - 1
1 0 0
1 0 1
0 0 . 1 0 . 2 0 . 3 0 . 4
Pres
sure
/ M
Pa
wt % H2
Magnetic Materials R&D Center
Equipment for Hydrogen Absorption TestEquipment for Hydrogen Absorption Test
Pressure Gage
SUS Container
H2 : 3MPa15MPa
Magnet
Test Conditions
Temp.： 25℃
Pressure：
3MPa、15MPa
Time： 6 days + 7days
Magnetic Materials R&D Center
Hydrogen Exposure Test for RE MagnetsHydrogen Exposure Test for RE Magnets
3MPa,25℃,1day 3MPa, 25℃,3days 3MPa, 25℃,7daysBefore Testing
Nd MagnetWith Ni
（20μm）
2-17SmCo
After Testing
Magnetic Materials R&D Center
Appearances of RE Magnets after the Appearances of RE Magnets after the TestsTests
15MPa,RT6days
Nd MagnetSm Magnet
15MPa,RT6days+7days
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