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Korean Journal of Metals and Materials > Volume 55(9); 2017 > Article
Korean Journal of Metals and Materials 2017;55(9): 645-650. doi: https://doi.org/10.3365/KJMM.2017.55.9.645
퍼멀로이 분말이 혼합된 철계 나노결정립 분말코어의 성형밀도와 연자성 특성에 관한 연구
신정훈, 정영목, 손근용, 박원욱
인제대학교 나노융합공학부
A Study on the Soft Magnetic Properties and Compaction Density of Fe-based Nanocrystalline Powder Cores Mixed with Permalloy Powders
Jeong Hoon Shin, Young Mok Jeong, Keun Yong Sohn, Won-Wook Park
Department of Nanoscience and Engineering, Inje University, Gimhae 50834, Republic of Korea
Correspondence  Won-Wook Park ,Tel: +82-55-320-3872, Email: wwpark@inje.ac.kr
Received: 30 December 2016;  Accepted: 12 May 2017.  Published online: 30 August 2017.
ABSTRACT
In this paper, the soft magnetic properties and compaction density of Fe-Si-B-Nb-Cu nanocrystalline powder cores, mixed with two kinds of permalloy powders (Ni70Fe30 or Ni50Fe50), have been closely studied. Permalloy powders having an average diameter of 4μm were added in the range of 5 to 15 wt%, and the powder composite was mixed with 1~2 wt% of water glass diluted with DI water. The powder cores were compacted in toroidal form at a pressure of about 35 tons, and then heat treated at 510 ~ 570 ℃ for 1 h. The magnetic properties of the soft magnetic composites (SMCs) were measured with a B-H analyzer and the microstructure was observed with FE-SEM. As a result, it was determined that the compaction density of the powder core increased with the increasing content of the mixed permalloy powder, which distinctly improved the composite’s magnetic properties, including initial permeability and core loss.
Keywords: nanocrystalline, powder core, compaction density, permalloy, soft magnetic properties
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