组织与性能的影响
(北京科技大学 生态与循环冶金教育部重点实验室，北京 100083)
摘 要: 在氢气气氛下对电沉积法制备的粒径10 nm左右的纳米晶Ni-Fe合金箔进行中温热处理(200、300、400和500 ℃)；利用扫描电镜观察合金箔的截面组织形貌；采用X射线衍射仪检测合金箔的晶体结构和粒径；利用软磁材料直流磁性测试装置测试合金箔的直流磁特性。结果表明：在氢气气氛中，300 ℃热处理保温1 h后，合金箔的粒径维持在10 nm左右，且直流磁性能最好，最大磁导率达到56.4 mH/m，饱和磁感应强度为1.56 T，矫顽力降至15.0 A/m。
关键字: 纳米晶；热处理；电沉积；Ni-Fe合金箔；直流磁特能
（Key Laboratory of Ecological and Recycle Metallurgy, University of Science and Technology Beijing,
Beijing 100083, China）
Abstract:Nanocrystalline Ni-Fe alloy foils with grain size of about 10 nm prepared by electrodeposition were annealed under hydrogen atmosphere at medium temperatures of 200, 300, 400 and 500 ℃. The cross-section microstructure was observed by scanning electronic microscopy, and the crystal structure and grain size were studied by X-ray diffractometry. The direct-current magnetic properties were measured by direct-current magnetic property testing equipment. The results indicate that when the sample is annealed at 300 ℃ for 1 h, the grain size of Ni-Fe alloy foils is still about 10 nm and the Ni-Fe alloy foils have the best direct-current magnetic properties of maximum permeability 56.4 mH/m, saturation flux density 1.56 T and coercivity 15.0 A/m.
Key words: nanocrystalline; annealing; electrodeposition; Ni-Fe alloy foil; direct-current magnetic property
