Effects of Two-step Annealing on the Magnetic Properties of Iron-based Nanocrystalline Soft Magnetic Material
In the present paper, the effects of two-step annealing on the soft magnetic properties of nanocrystalline Fe73.5Cu1Nb3Si13.5B9 melt spun ribbons were studied. The two-step annealing comprises low-temperature preannealing (first step) for an α-Fe(Si) phase nucleation in an amorphous matrix, and a subsequent high-temperature annealing (second step) for the growth of precipitated crystallites. Compared with a nanocrystalline alloy obtained by conventional one-step annealing at 550 oC for 1 h, the grain size of α-Fe(Si) crystalline phase in the Fe73.5Cu1Nb3Si13.5B9 alloy decreased greatly after it is pre-annealed at 480℃ for 1 h followed by annealing at 550℃ for 40 min. It has been shown that the soft magnetic properties can be significantly improved by applying two-step annealing. The decrease of grain size of α-Fe(Si) crystalline phase may result from the nucleation rate increase during the crystallization of pre-annealed.
two-step annealing magnetic properties nanocrystalline alloys crystallization
Qiang SONG Shuqing QIN
College of Material Science and Engineering, Shandong University of Science and Technology,Qingdao 2 Laigang Group, Machinery Manufacturing Co. Ltd, Laiwu 271104, China
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
353-357
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）