Abstract
Heterogeneous coarse surface crystallites induced in the industrial Fe-rich nanocrystalline alloy is an ob-stacle for high-frequency and high-power commercial applications.Herein,the phase,crystal orientation,nanostructure and magnetic domain evolution of the surface-crystallized Fe-rich alloy were systematically investigated.Microstructure and inverse pole figures analysis confirms that the DO3 ordered dendritic-crystallites bear<001>-oriented fiber texture before and after annealing at the free surface,while ultra-fine nanocrystals are randomly oriented in the interior and wheel surface after annealing.As compared to zero magnetic-field-annealing,the transverse magnetic-field-annealing induces weakly oriented fiber texture and relatively uniform dendritic-crystallites at the surface,and uniform anisotropy in the inte-rior and surface,which promotes smooth wall motion at the surface and magnetization rotation in the interior.This synergetic effect reduces the excess loss and leads reduction in dynamic loss at 1.0 T and 10 kHz by 36％.
基金项目
国家重点研发计划(2021YFB3803000)
国家自然科学基金(51801224)
国家自然科学基金(51771083)
国家自然科学基金(51971005)
Youth Innovation Promotion Association of CAS(2021294)
宁波市自然科学基金(2021J197)
宁波市自然科学基金(202003N4355)
NETL
NSTL
维普
万方数据