采用熔体快淬法制备(FeCo)_(78)Nb_6B_(15)Cu_1非晶薄带,通过DSC测试薄带的晶化特性,并据此在400,500,700和 750 ℃进行1 h退火处理.用XRD和SEM分析薄带在不同退火温度下的晶化行为,并用VSM测试薄带与粉体的静态磁参数.结果表明:对于固定成分的Hitperm合金,选择合适的退火温度,可控制晶粒大小和晶相比例.由于晶粒表面无序磁矩含量的变化,导致材料比饱和磁化强度发生变化,同时更小的纳米晶粒对降低矫顽力有利.由于淬态引入的微量结晶,薄带存在表面晶化现象,这在一定程度上会恶化材料的静态磁特性.
(FeCo)_(78)Nb_6B_(15)Cu_1 amorphous ribbons were prepared by a melt-quenching method; crystallization characteristics of the ribbons were tested by DSC, and accordingly annealing at 400, 500, 700 and 750 ℃ for 1 h were carried out. Crystallization behavior of the ribbons at different annealing temperatures was analyzed by XRD and SEM and the static magnetic parameters of the ribbon and the powder were measured by VSM. The results show that for the Hitperm alloy with a fixed composition, a suitable annealing temperature can control the grain size and phase ratio and adjust disorder magnetic moment of the grain surface, thereby improving the specific saturation magnetization of material. Moreover, the small nano-grain is favorable for depressing the coercivity. Due to the introduction of ultracrystallite when quenching, there is crystallization on the surface of the ribbon, which will worsen the static magnetic properties of materials to a certain extent.
参考文献
| [1] | Yoshizawa Y;Oguma S;Yamauchi K .[J].Journal of Applied Physics,1988,64(10):6044. |
| [2] | Suzuki K;Makino A;Inoue A et al.[J].Materials Transactions-Japan Institute of Metals,1991,32(01):93. |
| [3] | Michael E. McHenry;Matthew A. Willard;David E. Laughlin .Amorphous and nanocrystalline materials for applications as soft magnets[J].Progress in materials science,1999(4):291-433. |
| [4] | Koster U;Meinhardt J .[J].Materials Science and Engineering,1994,A178:271. |
| [5] | May JE;de Oliveira MF;Afonso CRM;Lisboa RDS;Kuri SE .Amorphous phase partitioning in FeCo-based metallic glass alloys[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2004(0):250-257. |
| [6] | Johnson F;Um CY;McHenry ME;Garmestani H .The influence of composition and field annealing on magnetic properties of FeCo-based amorphous and nanocrystalline alloys[J].Journal of Magnetism and Magnetic Materials,2006(2):93-98. |
| [7] | Willard MA.;Mchenry ME.;Thoma D.;Sickafus K.;Cross JO. Harris VG.;Laughlin DE. .Structure and magnetic properties of (Fe0.5Co0.5)(88)Zr7B4Cu1 nanocrystalline alloys[J].Journal of Applied Physics,1998(12):6773-6777. |
| [8] | Iwanabe H;Lu B;McHenry M E .[J].Journal of Applied Physics,1999,85B:4424. |
| [9] | Jang J S C;Hung T H;Chang L J .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2004,375-377:307. |
| [10] | Funakoshi N;Kanamori T;Manabe T .[J].Japanese Journal of Applied Physics,1979,18(10):1885. |
| [11] | Ayers JD.;Dantonio P.;Pattnaik A.;Vold CL.;Jones HN.;Konnert JH. .MORPHOLOGY OF SURFACE CRYSTALLITES ON AMORPHOUS FE87ZR7B5CU1[J].Journal of Materials Science,1995(18):4492-4506. |
| [12] | Kopcewicz M.;Grabias A. .MOSSBAUER STUDY OF THE SURFACE CRYSTALLIZATION OF THE AMORPHOUS AND NANOCRYSTALLINE FE81ZR7B12 ALLOY[J].Journal of Applied Physics,1996(6):3422-3425. |
| [13] | Kopcewicz M.;Nowicki P.;Williamson DL.;Grabias A. .MOSSBAUER AND X-RAY STUDY OF THE STRUCTURE AND MAGNETIC PROPERTIES OF AMORPHOUS AND NANOCRYSTALLINE FE81ZR7B12 AND FE79ZR7B12CU2 ALLAYS[J].Journal of Applied Physics,1996(2):993-1003. |
| [14] | Batlle X;Labarta A .[J].Journal of Physics D:Applied Physics,2002,35:15. |
| [15] | 周廷栋,梁迪飞,李强,鄢波,邓龙江.退火温度对FeCuNbSiB纤维的结构及磁特性的影响[J].稀有金属材料与工程,2006(12):2005-2007. |
| [16] | Giselher Herzer .[J].Journal of Magnetism and Magnetic Materials,2005,294:99. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%