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Advances in Materials Science and Engineering
Volume 2016, Article ID 5378276, 11 pages
Research Article

Influence of Annealing Methods on the Magnetic Properties and Flexural Strength of Iron-OER Soft Magnetic Composites

1Department of Basic Courses, Mechanics Research Center, Xi’an University of Science and Technology, No. 58, Yanta Road, Xi’an, Shaanxi 710054, China
2State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an, Shaanxi 710049, China

Received 19 January 2016; Revised 4 May 2016; Accepted 10 May 2016

Academic Editor: Pavel Lejcek

Copyright © 2016 Ling Xiao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This study aims at investigating high flexural strength iron-OER soft magnetic composites (SMCs) for active magnetic bearings (AMBs). Iron powders were firstly coated with oxide layer by the passivation process at room temperature. The effect of annealing methods on the static performance, magnetic properties, and flexural strength of SMCs was studied. The results showed that the significant improvements of permeability, magnetic loss, and flexural strength were presented by increasing the bonding number between iron surface and resin and using the two-step annealing method. In addition, the effect of pore shape and angle on the behavior of material fracture has been studied by FEM and the analysis was validated by experimental results.