| The Stability of Rare Earth-Iron-Nitrides Sm_2(Fe,M)_(17)N_y,Permanent Magnets |
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| 作者姓名： | 杨俊 周寿增 张茂才 马德青 李佛标 王润 |
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| 作者单位： | Department of Materials University of Science and Technology Beijing，Bering 100083，China，Department of Materials，University of Science and Technology Beijing，Bering 100083，China，Department of Materials，University of Science and Technology Beijing，Bering 100083，China，Department of Materials，University of Science and Technology Beijing，Bering 100083，China，Department of Materials，University of Science and Technology Beijing，Bering 100083，China，Department of Materials，University of Science and Technology Beijing，Bering 100083，China |
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| 摘 要： | The effects of the partial substitution of element M(M=Cr,V,Mn,x=0.05;Zr,Ga,x=0.017;Si,x=0.15;Co,x=0.10)for Fe in samarium-iron-nitride Sm_2(Fe_(1-x)M_x)_(17)N_y compounds on their stabilitiesand Curie temperatures have been studied.It is found that Co,Ga can raise the Curie temperature of thecompounds.The initial decomposition temperatures cannot be raised significantly by all the studied elementsexcept Co.The result contradicts the formation enthalpy consideration.The final decomposition tempera-tures can be raised by all of the substitution elements.The effects of atmospheres on their decomposition be-havior were also studied.The results show that oxidation is the major reason for magnetic deterioration ofthe powder heated in air.Compared with nitrogen atmosphere,argon or vacuum helps to delay the decompo-sition of the compounds.
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The Stability of Rare Earth-Iron-Nitrides Sm_2(Fe,M)_(17)N_y,Permanent Magnets |
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| Yang Jun Zhou Shou-Zeng Zhang Mao-Cai Ma De-Qing Li Fu-Biao Wang Pun Oepartment of Materials,University of Science and Technology Beijing,Bering ,China.The Stability of Rare Earth-Iron-Nitrides Sm_2(Fe,M)_(17)N_y,Permanent Magnets[J].Journal of Rare Earths,1993(1). |
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| Authors: | Yang Jun Zhou Shou-Zeng Zhang Mao-Cai Ma De-Qing Li Fu-Biao Wang Pun Oepartment of Materials University of Science and Technology Beijing Bering China |
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| Affiliation: | Yang Jun Zhou Shou-Zeng Zhang Mao-Cai Ma De-Qing Li Fu-Biao Wang Pun Oepartment of Materials,University of Science and Technology Beijing,Bering 100083,China |
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| Abstract: | The effects of the partial substitution of element M(M=Cr,V,Mn,x=0.05;Zr,Ga,x=0.017; Si,x=0.15;Co,x=0.10)for Fe in samarium-iron-nitride Sm_2(Fe_(1-x)M_x)_(17)N_y compounds on their stabilities and Curie temperatures have been studied.It is found that Co,Ga can raise the Curie temperature of the compounds.The initial decomposition temperatures cannot be raised significantly by all the studied elements except Co.The result contradicts the formation enthalpy consideration.The final decomposition tempera- tures can be raised by all of the substitution elements.The effects of atmospheres on their decomposition be- havior were also studied.The results show that oxidation is the major reason for magnetic deterioration of the powder heated in air.Compared with nitrogen atmosphere,argon or vacuum helps to delay the decompo- sition of the compounds. |
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| Keywords: | Rare earth-iron-nitride Permanent magnet Stability |
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