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Influence rules of early transition elements on rapid solidified structure and nanocrystallization behaviors of fe-Si-B-Cu soft magnetic alloys with high Cu content

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Journal of Materials Science & Technology 2024年第17期184卷 157-166页

作者： Xingjie Jia Yaqiang Dong Wei Zhang Ling Zhang Yanqiu Li Aina He Jiawei Li Wenjun Wang Baogen Shen Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Key Laboratory of Solidification Control and Digital preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China University of Chinese Academy of Sciences Beijing 100049China Niobium Product Department CITIC Metal Company LimitedBeijing 100004China

Unique rapid solidified structure and nanocrystallization mechanism enable the fe-based nanocrystalline alloys with high Cu content excellent soft magnetic properties and good manufacturability,and also results in unusual phenomena in terms of alloying *** the present work,we systematically studied the influence rules of early transition elements on the rapid solidified structure and nanocrystallization behaviors of fe-Si-B-Cu soft magnetic alloys with high Cu content and explored the related *** terms of rapid solidified structure,the additions of early transition elements always inhibit the for-mation of pre-existingα-fe crystals even eliminate them,and the additions that could produce larger atomic mismatch parameter(δ)and negative mixing enthalpy(△H_(mix))show stronger *** terms of nanocrystallization behaviors,the increases inδand negative△H_(mix) weaken the competitive growth between the pre-existing nanocrystals during annealing and then coarsen the nanostructure of the an-nealed alloys and deteriorate their magnetic softness,while the excessive increases inδand negativeHmix could significantly suppress the growth ofα-fe crystals by diffusion inhibition during annealing and thus remarkable refine the nanostructure of the annealed alloys and improve their magnetic softness.

关键词： Nanocrystalline soft magnetic alloys Early transition elements Rapid solidified structure Nanocrystallization behaviors pre-existingα-fe crystals

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