J. Mater. Sci. Technol. ›› 2010, Vol. 26 ›› Issue (2): 146-150.

• Research Articles • 上一篇    下一篇

Influences of similar elements on glass formability and magnetic properties in Al-Ni-La amorphous alloy

李桂华1;Weimin Wang2;边秀房3;Jiteng Zhang2;Rui Li2;Li Wang2;Tang Huang2   

  1. 1. 山东大学材料学院
    2. Shandong University
    3. 山东大学
  • 收稿日期:2008-10-13 修回日期:2009-03-09 出版日期:2010-02-28 发布日期:2010-02-28
  • 通讯作者: 李桂华
  • 基金资助:

    National Natural Science Foundation: No.50301008;50471052 and 50631010.Shandong Science and Research Foundation: No.Y2005F02National Basic Research Program of China (973 Program):2007CB613901;无

Influences of Similar Elements on Glass Forming Ability and Magnetic Properties in Al-Ni-La Amorphous Alloy

Guihua Li, Weimin Wang, Xiufang Bian, Li Wang, Jiteng Zhang, Rui Li, Tao Huang   

  1. Key Laboratory for Liquid-Solid Structureal Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
  • Received:2008-10-13 Revised:2009-03-09 Online:2010-02-28 Published:2010-02-28
  • Contact: Weimin Wang
  • Supported by:

    the National Natural Science Foundation of China (Nos. 50871061, 50871062, 50831003 and 50631010),
    the Excellent Youth Science and Technology Award of Shandong Province (No. 2008BS04020),
    the project NCET-06-584 and the National Basic Research Program of China ("973 Program", No. 2007CB613901) for financial supports

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摘要：

为了提高Al86Ni9La5非晶合金的非晶形成能力，本文应用了相似元素替代的方法。应用X射线衍射技术、透射电镜技术、差热扫描量热仪、磁力计以及硬度计研究了Ce替代La和Co替代Ni对Al-Ni-La合金的非晶形成能力、磁性和硬度的影响。研究发现试样非晶形成能力大小的顺序为：Al86(Ni0.5Co0.5)9(La0.5Ce0.5)5 < Al86Ni9La5 < Al86Ni9(La0.5Ce0.5)5，表明相似元素替代只能有限的提高Al-Ni-La合金的非晶形成能力。另外，所有试样在室温下显示抗磁性行为。试样的抗磁性行为及硬度的变化与合金的微观结构密切相关，即：与二十面体结构和析出相的量有关。

Abstract:

Similar element substitution has been applied for improving glass forming ability (GFA) in Al86Ni9La5 amorphous alloy. The effects of La-Ce and Ni-Co pairs on the GFA, magnetic properties and hardness of Al-Ni-La alloy were investigated by using X-ray diffraction (XRD), transmission electron microscopy (TEM), differential scanning calorimetry (DSC), magnetometer and hardness-tester. The results show the GFA of the samples in the order of Al86(Ni0:5Co0:5)9(La0:5Ce0:5)5< Al86Ni9La586Ni9(La0:5Ce0:5)5, implying that similar element substitution has a limited enhancing effect on the GFA of the present Al-Ni-La alloy. In addition, the measured samples display a diamagnetic behavior at room temperature. The variations of diamagnetic behavior as well as the microhardness of the samples are strongly dependent on the  icrostructure, i.e., the amounts of the icosahedral structure and precipitates, after the similar element substitution in the Al-Ni-La alloy.

Key words: X-ray diffraction (XRD), Transmission electron microscopy (TEM), Diamagnetic behavior, Icosahedral structure