Development of Spring-type Magnet in Nitrogen Contained Rare-earth-Fe Compounds

含氮稀土铁化合物弹簧型磁体的研制

• 批准号: 06650768
• 负责人: SUGIMOTO Satoshi
• 金额: $ 1.28万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650768/
• 关键词: nitrogen contained compound; exchange-spring magne; anncaling for crystallization; nitriding; coercivity; melt-spinning; メルトスパン; Sm_2Fe_<17>N_x系化合物; ThMn_<12>型化合物; 交換スプリングマグネット; 結晶化過程

Possibility of the exchange-spring magnets in Sm-Fe-(C,N) and Nd-Fe-Mo-N systems has been studied by preparing the microduplex structure consisting of a nanocrystalline soft magnetic alpha-Fe phase and a hard magnetic Sm_2Fe_<17> (C,N) _x and Nd (Fe, Mo) _<12>N_x phase. In this study, the microduplex structure was prepared by annealing the melt-spun ribbons with amorphous state. The magnetic properties of annealed Sm_yFe_<95-y>C_5 (y=5-10) ribbons after nitriding, whose Sm content was lower than the stoichiometric composition of Sm_2Fe_<17>C,were investigated in correlation with their microstructures. In as-spun state, Sm_<7-10>Fe_<85-88>C_5 (y=7-10) ribbons consist only of amorphous phase, while in the Sm_5Fe_<90>C_5 (y=5) and Sm_6Fe_<91>C_5 (y=6) ribbons an alpha-Fe phase is also observed. The alpha-Fe phase in the ribbons with y=5 and 6 can be formed by the crystallization during melt-quenching. In all cases, the amorphous phase disappears after the annealing above 600ﾟC,resulting i … More n the microduplex structure with alpha-Fe and Sm_2Fe_<17>C_x phases. Relatively high coercivities were observed in Sm_<7-10>Fe_<85-88>C_5 ribbons after annealing and subsequent nitriding. Especially, Sm_7Fe_<88>C_5 ribbon annealed at 600ﾟC for 5min and subsequently nitrided at 450ﾟC for 4h exhibits the coercivity of 269kAm^<-1> with the maximum energy product of 70.1kJm^<-3>. In Nd-Fe-Mo-N melt-spun ribbons, the crystallization temperatures of Nd (Fe, Mo) _<12> phase with ThMn12-type structure and alpha-Fe phase are at around 600ﾟC and 500ﾟC,respectively. Nd_<0.9>Fe_<11>Mo_<0.9>N_X ribbon after heat treatment at 900ﾟC for 30 min and subsequent nitriding at 550ﾟC for 4h exhibits coercivity of 240kAm^<-1>. The V addition increases coercivity and the highest coercivity of 312kAm^<-1> can be obtained with the Nd_<0.9> (Fe_<0.98>V_<0.02>) _<11>Mo_<0.9>N_X ribbon annealed at 900ﾟC for 30min and nitrided at 550ﾟC for 4h. It can be concluded that Sm-Fe-C-N and Nd_<1-delta> (Fe, Mo) _<12>N_X melt-spun ribbons show a relatively high magnetic properties. Less

通过制备由纳米晶软磁α-Fe相和硬磁Sm_2Fe_（C，N）_x及Nd（Fe，Mo）_ N_x相组成的微双相结构，研究了Sm-Fe-（C，N）和Nd-Fe-Mo-N系交换弹簧磁体的可能性<17><12>。本研究以非晶快淬薄带为原料，经退火处理制备微双相结构。研究<95-y>了Sm含量低于Sm_2Fe_ C化学计量比的Sm_yFe_ C_5（y=5-10）薄带经氮化处理<17>后的磁性能及其与显微组织的关系。<7-10>Sm_5Fe_C_5<85-88>（y <90>=5）和Sm_6Fe_C_5（<91>y=6）薄带中还观察到α-Fe相。y=5和6的薄带中的α-Fe相可以通过熔体淬火过程中的晶化形成。在所有情况下，非晶相在600 ℃以上退火后消失，导致 ...更多信息 α-Fe和Sm_2Fe_ C_x相的显微复相组织<17>。<7-10>Sm_Fe_C_5<85-88>薄带经退火和氮化处理后，具有较高的矫顽力。特别是<88>在600 ℃退火5 min，然后在450 ℃氮化4 h的Sm_7Fe_C_5薄带，其矫顽力为269 kAm ^<-1>，最大能积为70.1kJm^<-3>。在Nd-Fe-Mo-N快淬薄带中，具有ThMn_（12）型结构的Nd（Fe，Mo）_2<12>相和α-Fe相的晶化温度分别为600 ℃和500 ℃左右。Nd_<0.9>Fe_<11>Mo_<0.9>N_X薄带经900 ℃热处理30 min，550 ℃氮化4 h后，其矫顽力为240 kAm ~（-1）<-1>。V的加入提高了<-1>Nd_<0.9>（Fe_<0.98>V_<0.02>）_<11>Mo_<0.9>N_X带的矫顽力，在900 ℃退火30 min，550 ℃氮化4 h时，可获得最高矫顽力312 kAm_（1/2）。Sm-Fe-C-N和Nd_<1-delta>（Fe，Mo）_<12>N_X快淬薄带具有较高的磁性能。少

项目成果

Satoshi, Sugimoto: "Magnetic Properties of Sm-Fe-(C, N) Melt-Spum Ribbons with Low Sm Content" Materials Transactions, JIM. 35. 917-922 (1994)

Satoshi, Sugimoto：“低 Sm 含量的 Sm-Fe-(C, N) 熔体带材的磁性”Materials Transactions，JIM。

Satoshi Sugimoto: "Magnetic Properties of Sm-Fe-(C.N) Melt-Spun Ribbons with Low Sm Content" Materials Transactions. JIM,35. 917-922 (1994)

Satoshi Sugimoto：“低 Sm 含量的 Sm-Fe-(C.N) 熔纺带的磁性”材料交易。

Satoshi Sugimoto: "Magnetic Properties of Nd_<1-delta> (Fe, Mo) _<12>N_X Melt-Spun Ribbons with Low Sm Content" Materials Transactions. JIM,35. 640-644 (1994)

Satoshi Sugimoto：“低 Sm 含量的 Nd_<1-delta>（Fe、Mo）_<12>N_X 熔纺带的磁性”材料交易。

Satoshi Sugimoto: "Magnetic Properties of Nd_<1-δ>(Fe, Mo)_<12>N_x Melt-Spun Ribbons with Low Sm Content" Materials Transactions, JIM. 35. 640-644 (1994)

Satoshi Sugimoto：“低 Sm 含量的 Nd_<1-δ>(Fe, Mo)_<12>N_x 熔纺带的磁性”Materials Transactions，JIM 35. 640-644 (1994)。

Satoshi, Sugimoto: "Magnetic Properties of Nd_<1-δ>(Fe, Mo)_<12>N_x Melt-Spun Ribbons with Low Sm Content" Materials Transactions, JIM. 35. 640-644 (1994)

Satoshi, Sugimoto：“低 Sm 含量的 Nd_<1-δ>(Fe, Mo)_<12>N_x 熔纺带材的磁性”Materials Transactions，JIM 35. 640-644 (1994)。