东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2012, Vol. 33 ›› Issue (2): 228-231.DOI: -

• 论著 • 上一篇    下一篇

Fe-Pt-Au三元系950℃富角等温截面的研究

徐晓宁;任玉平;李俊杰;秦高梧;   

  1. 东北大学材料各向异性与织构教育部重点实验室;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-01-17
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50871028);;

Isothermal section of Fe-rich corner in Fe-Pt-Au ternary system at 950C

Xu, Xiao-Ning (1); Ren, Yu-Ping (1); Li, Jun-Jie (1); Qin, Gao-Wu (1)   

  1. (1) Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-01-17
  • Contact: Qin, G.-W.
  • About author:-
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摘要： 为了控制细小的L10-FePt纳米相均匀分布在非磁性基体中,有必要对Fe-Pt-X系的相图进行系统研究.通过合金法和扩散偶法,利用X射线衍射(XRD)、扫描电镜及能谱成分(SEM-EDS)分析确定了Fe-Pt-Au三元系950℃富Fe角处相平衡关系及各相平衡成分,从而建立了富Fe角的等温截面相图.结果表明,该等温截面存在成分范围很宽的(γFe+αAu)两相区和成分范围很窄的(γFe+L10-FePt)两相区.Pt的加入使Au在γFe中的固溶度从约4%提高到约15%(原子数分数),而大大降低了Fe在αAu中的固溶度;Au的加入使Pt在γFe中的固溶度降低,并且没有扩大(γFe+L10-FePt)...

关键词: Fe-Pt-Au三元系, 相平衡, 等温截面, 磁记录介质, 扩散偶

Abstract: In order to control the homogeneous distribution of fine L10-FePt nano-phase in a non-magnetic matrix, it is necessary to systematically study phase diagrams of Fe-Pt-X systems. In this work, phase relationships and equilibrium phase compositions in the Fe-rich corner of the Fe-Pt-Au ternary system at 950°C were studied by both alloying method and diffusion couple technique using X-ray diffraction and scanning electron microscopy assisted with energy dispersive spectroscopy (SEM-EDS), thus the isothermal section of Fe-rich corner was constructed in this system at 950°C. The results showed that there exists a wide (γ Fe+αAu) and a narrow (γFe+L10-FePt) two-phase regions. The solubility of Au in the γFe phase increases from ~4% to ~15% with the addition of Pt, whereas the solubility of Fe in the αAu phase decreases rapidly. With the addition of Au, the solubility of Pt in the γFe phase decreases and the (γFe+L10-FePt) two-phase region remains unexpanded.

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