快淬钐铁合金的氮化处理
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摘要
通过XRD、SEM等手段研究了快淬钐铁合金的氮化处理工艺。研究结果表明:快淬钐铁薄带经氮化后主要由Sm2Fe17Nx、α-Fe、Fe2O3和Sm2O3组成;含有非晶的快淬钐铁薄带经过氮化处理之后,发生了部分晶化,但结晶度较低或晶粒很小,没有过分长大,基本保持了快淬薄带的晶粒尺寸;渗氮后贴辊面上散落排列着清晰可见的细小晶粒,最大晶粒尺寸在5μm左右,自由面上球形颗粒的边界处杂乱地分布着含有氮化物的白色物质,且快淬速度越大的薄带上析出的白色物质越多。
The nitriding treatment process of Sm-Fe melt-spinning alloy was researched through XRD,SEM and other means.The results show that Sm-Fe melt-spinning ribbons after nitriding are mainly composed of Sm2 Fe17 Nx,α-Fe,Fe2 O3 and Sm2 O3.After nitriding,Sm-Fe melt-spinning ribbons containing noncrystal partially crystallize,but the crystallinity is relatively low or the grains are small,not excessively grown and almost maintaining the grain size of melt-spinning ribbons.There are clearly visible fine grains scattering in the roll surface after nitriding,and the maximum grain size is about 5μm.The white stuff containing nitrides is distributed in disorder at the boundary of spherical particles on the free surface,and the greater the melt-spinning speed,the more the white stuff precipitated in the Sm-Fe ribbons.
The nitriding treatment process of Sm-Fe melt-spinning alloy was researched through XRD,SEM and other means.The results show that Sm-Fe melt-spinning ribbons after nitriding are mainly composed of Sm2 Fe17 Nx,α-Fe,Fe2 O3 and Sm2 O3.After nitriding,Sm-Fe melt-spinning ribbons containing noncrystal partially crystallize,but the crystallinity is relatively low or the grains are small,not excessively grown and almost maintaining the grain size of melt-spinning ribbons.There are clearly visible fine grains scattering in the roll surface after nitriding,and the maximum grain size is about 5μm.The white stuff containing nitrides is distributed in disorder at the boundary of spherical particles on the free surface,and the greater the melt-spinning speed,the more the white stuff precipitated in the Sm-Fe ribbons.
引文
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[2]ZHAO X G,ZHANG Z D,LIU W,et al.Structural magnetic properties of Sm-Fe-N magnets prepared by hydrogenation and nitrogenation processes[J].J Magn Magn Mater,1995,148:419-425.
[3]罗阳.SmFe7金属间化合物---新一代磁体的希望[J].粉末冶金工业,2000,5(10):26-31.
[4]启明.高性能稀土磁体的开发[J].金属功能材料,2007,13(1):41-42.
[5]李大勇,段焕强.钐铁氮稀土永磁材料产业化进展[J].中国新技术新产品,2012,20:146-149.
[6]COEHOOM R,DE MOOIJ D B,DUCHATEAU J P WB,et al.Novel permanent magnetic materials made by rapid quenching[J].Le Journal De Physique Colloques,1988,49(C8):669-670.
[7]KATTER M,WECKER J,SCHULTZ L.Structural and hard magnetic properties of rapidly solidified Sm-Fe-N[J].Journal of Applied Physics,1991,70(6):3 188-3 196.
[8]KOU X C.Coercivity of SmFeN permanent magnets produced by various techniques[J].Journal of Alloys and Compounds,1998,281:41-45.
[9]KOBAYASHI K,IRIYAMA T,YAMAGUCHI T.Magnetic properties of the single magnetic domain particles of Sm2Fe17Nx compounds[J].Journal of Alloys Compounds,1993,193(1/2):235-238.
[10]YANG Y C,ZHANG X D,GE S L.Magnetic and crystallographic properties of novel Fe-rich rare-earth nitrides of the type RTiFe11N1-δ(invited)[J].Journal of Applied Physics,1991,70(10):6 001-6 005.
[11]DING J,MCCORMICK P G,STREET R.Structure and magnetic properties of mechanically alloyed SmxFe100-x nitride[J].Journal of Alloys Compounds,1992,189(1):83-86.
[12]王书桓,袁亮亮,赵定国,等.Sm2Fe17型合金氮化工艺的研究进展[J].中国稀土学报,2017,35(3):318-319.
[13]杨伟.熔体快淬法制备Sm3(Fe,M)(29)Nx/α-Fe(M=Co,V,Mn)双相纳米复合永磁材料的研究[D].天津:河北工业大学,2006.
[14]崔忠圻,覃耀春.金属学与热处理[M].2版.北京:机械工业出版社,2007.
[15]周尧和.凝固技术[M].北京:机械工业出版社,1998.
[16]汪卫华.非晶中“缺陷”---流变单元研究[J].中国科学:物理学·力学·天文学,2014,44(4):396-405.