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Phase Separation and Ordering in the Fe-Co System

机译:Fe-Co系统中的相分离和有序化

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摘要

The Fe_(50)Co_(50), Fe_(65)Co_(35), and Fe_(35)Co_(65) alloys heat-treated between 500 and 1300℃ were characterized by x-ray diffraction and transmission electron microscopy. The surface layer of the alloys was found to phase-separate in the range 900-1300℃, leading to the formation of alternating α and γ zones on the order of 0.5 μm in thickness. Phase separation in the bulk of the alloys led to precipitation of an fcc phase, with a volume fraction no greater than 0.1. In the ordering region, the volume fraction of the B2 phase was also no greater than 0.1. The phase-separation region was shown to be divided from the ordering region by a solid-solution phase. Below 550℃, the alloys undergo a phase transformation accompanied by a slight increase in lattice parameter. Comparison with a similar transformation of the Fe_(60)Cr_(30)Co_(10) alloy suggests that, under certain conditions, this transformation may lead to a significant rise in coercivity. The results are represented in a modified Fe-Co phase diagram.
机译:用X射线衍射和透射电镜对经过热处理的Fe_(50)Co_(50),Fe_(65)Co_(35)和Fe_(35)Co_(65)合金进行了表征。发现合金的表面层在900-1300℃的范围内发生相分离,导致形成厚度约为0.5μm的交替的α和γ区。大部分合金中的相分离导致fcc相析出,体积分数不大于0.1。在有序区域中,B 2相的体积分数也不大于0.1。示出了相分离区域被固溶相与有序区域分开。低于550℃,合金发生相变,晶格参数略有增加。与Fe_(60)Cr_(30)Co_(10)合金的类似转变的比较表明,在某些条件下,这种转变可能导致矫顽力的显着提高。结果以改进的Fe-Co相图表示。

著录项

  • 来源
    《Inorganic materials》 |2006年第4期|p.354-359|共6页
  • 作者单位

    Physicotechnical Institute, Udmurt Scientific Center, Ural Division, Russian Academy of Sciences, ul. Kirova 132, Izhevsk, 426000 Russia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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