Anisotropy of mechanical properties of Sm-Co permanent magnets doped with dysprosium

2015 IEEE Magnetics Conference (INTERMAG) Pub Date : 2015-05-11 DOI:10.1109/INTMAG.2015.7156519

Z. Xue, Z. Liu, L. Liu, M. Li, S. He, D. Lee, Y. Guo, A. Yan

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引用次数: 2

Abstract

Sintered SmCo permanent magnets are widely applied in space, aviation and the military-related industries due to their advantages under high temperature over NdFeB magnets. However, poor mechanical performance compared to their magnetic properties is not satisfactory. The brittleness in manufacturing results in 20-30% of raw materials wasted, which is urged to be solved[1]. For many years, various investigations on their bending strength, impact toughness and thermal expansion have been performed[2-4], but results on an effective method to improve the fracture-resistance are rarely found. In this paper, fracture behavior of sintered (Sm1-xDyx)(Co0.695Fe0. 2Cu0.08Zr0.025)7.2 (x=0, 0.2, 0.4, 0.6, 0.8) magnets are studied and recorded. Highly micro-twins are observed by using transmission electron microscopy (TEM) and indexed by simulated selected area electron diffraction (SAED) patterns. Based on the researches that twinning may contribute to the improvement of bending strength in many metals, the mechanism of anisotropy in mechanical properties is analyzed from the influence of the micro-twin structure and the correlation between mechanical anisotropy and magnetic properties.

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掺镝Sm-Co永磁体力学性能的各向异性

烧结钐钴永磁体在高温条件下具有优于钕铁硼永磁体的优点，被广泛应用于航天、航空和军事相关行业。然而，较差的机械性能与它们的磁性能相比是不令人满意的。制造过程中的脆性导致20-30%的原材料浪费，这是亟待解决的问题[1]。多年来，人们对其抗弯强度、冲击韧性和热膨胀进行了各种各样的研究[2-4]，但很少发现有效的方法来提高其抗断裂性。本文研究了烧结(Sm1-xDyx)(Co0.695Fe0;研究并记录了2Cu0.08Zr0.025)7.2 (x= 0,0.2, 0.4, 0.6, 0.8)磁体。利用透射电子显微镜(TEM)和模拟选择区电子衍射(SAED)模式对高微孪晶进行了观察。在研究孪晶有助于提高多种金属抗弯强度的基础上，从微观孪晶组织的影响、力学各向异性与磁性能的关系等方面分析了各向异性影响力学性能的机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 IEEE Magnetics Conference (INTERMAG)

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