Effect of Ti Addition on Magnetic Properties of TbCu7-type Sm-Fe-Co-Mn System Nitrides
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- Yamamoto Hiroshi
- Department of Electronics & Bioinfomatics, School of Science & Technology, Meiji University
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- Osanai Kenta
- Department of Electronics & Bioinfomatics, School of Science & Technology, Meiji University
Bibliographic Information
- Other Title
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- TbCu7型構造Sm‐Fe‐Co‐Mn系窒化化合物磁石の磁気特性に及ぼすTi添加の影響
- TbCu7型構造Sm-Fe-Co-Mn系窒化化合物磁石の磁気特性に及ぼすTi添加の影響
- TbCu7ガタ コウゾウ Sm Fe Co Mnケイ チッカ カゴウブツ ジシャク ノ ジキ トクセイ ニ オヨボス Ti テンカ ノ エイキョウ
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Abstract
This experiment was aiming for making high performance isotropic bonded magnet. And this experiments were carried out to investigate the effect of Ti addition for magnetic properties of Sm-Fe-Co-Mn system nitriding compounds with TbCu7-type structure. Sm10(Fe0.9Co0.1)89.5-xMn0.5Tix (x = 0˜1.0) alloy ribbons were prepared by the single roller rapid-quenching method. And the effects of alloy composition, and conditions of heat-treatment and nitrogenation on the magnetic properties were examined. The optimum preparation conditions of the compounds are as follows. Composition: {Sm10(Fe0.9Co0.1)89Mn0.5Ti0.5}86.8- N13.2, roller velocity: 50 m/s, heat treatment: 700 °C×60 min in high-purity Ar gas, and nitriding condition: 420 °C×15 h in high-purity N2 gas. Typical magnetic properties of the obtained compound powders are Jr = 0.97 T, HcJ = 730.8 kA/m, (BH)max = 140.0 kJ/m3 (17.6 MGOe), and TC = 500 °C. It was found that this sample was an exchange spring magnet from XRD, TEM photograph and recoil loops of the hysteresis curve. The value of (BH)max for the isotropic compression molding bonded magnet prepared from the {Sm10(Fe0.9Co0.1)89Mn0.5Ti0.5}86.8N13.2 powder is 94.8 kJ/m3 (11.9 MGOe), when the density of bonded magnet is 6.07 Mg/m3. And the reversible temperature coefficient of Jr is α(Jr) = -0.04 %/°C, the temperature coefficient of HcJ in the range from 25 °C to 125 °C obtained by a linear extrapolation is α(HcJ) = -0.40 %/°C.
Journal
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- IEEJ Transactions on Fundamentals and Materials
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IEEJ Transactions on Fundamentals and Materials 127 (8), 481-486, 2007
The Institute of Electrical Engineers of Japan
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Details 詳細情報について
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- CRID
- 1390282679571009536
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- NII Article ID
- 10019523319
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- NII Book ID
- AN10136312
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- ISSN
- 13475533
- 03854205
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- NDL BIB ID
- 8906059
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed