本征参数对Dy- Gd-Co-Al合金非晶形成能力的影响Dependence of amorphous formation ability on intrinsic parameters in Dy- Gd-Co-Al alloys

J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (05): 665-668.

本征参数对Dy- Gd-Co-Al合金非晶形成能力的影响Dependence of amorphous formation ability on intrinsic parameters in Dy- Gd-Co-Al alloys

罗林¹;田瑞¹;肖学山²

1.
2. 上海大学

收稿日期:2008-05-08 修回日期:2008-09-22 出版日期:2009-09-28 发布日期:2009-10-10
通讯作者: 肖学山

Dependence of Amorphous Formation Ability on Intrinsic Parameters in Dy-Gd-Co-Al Alloys

Lin Luo, Rui Tian, Xueshan Xiao

Institute of Materials, Shanghai University, Shanghai 200072, China

Received:2008-05-08 Revised:2008-09-22 Online:2009-09-28 Published:2009-10-10
Supported by:
the National Natural Science Foundation of China (No. 50571054).

摘要/Abstract

摘要：

采用水冷铜模的方法制备了一系列Dy(Gd)-based块体非晶合金。并利用差示扫描量热计（DSC）分析Dy-Gd-Co-Al合金的热稳定性、用X射线衍射仪（XRD）来确定合金的结构。结果表明Dy-Gd-Co-Al合金有较好的玻璃形成能力，其中，Dy31Gd25Co20Al24 合金能获得直径为5mm的完全非晶棒。多元合金的非晶形成能力与组元原子间的化学键作用（等效电负性、等效原子半径差）等本征参数密切相关。Dy(Gd)基块体非晶合金有较大的玻尔磁子常数，在功能材料领域有一定的应用潜力。

关键词: Dy(Gd)-based;Glass forming ability;Intrinsic parameters

Abstract:

A series of Dy(Gd)-based bulk amorphous alloy rods were prepared by water-cooled copper mold method. Thermal stability and structure of Dy-Gd-Co-Al alloys were investigated by differential scanning calorimetry and X-ray diffraction, respectively. The results show that the Dy-Gd-Co-Al alloys have good glass-formation ability, and the Dy₃₁Gd₂₅Co₂₀Al₂₄ alloy can be readily cast into full glassy rods up to 5 mm in diameter. The glass-forming ability of multicomponent alloys was greatly dependent on their chemical interaction and the equivalent bond parameters among atoms such as equivalent electronegativity difference, equivalent atomic size parameter. The Dy (Gd)-based bulk amorphous alloys could be expected as potential functional materials.

Key words: Dy(Gd)-based, Glass forming ability, Intrinsic parameters

罗林田瑞肖学山. 本征参数对Dy- Gd-Co-Al合金非晶形成能力的影响Dependence of amorphous formation ability on intrinsic parameters in Dy- Gd-Co-Al alloys[J]. J. Mater. Sci. Technol., 2009, 25(05): 665-668.

Lin Luo,Rui Tian,Xueshan Xiao. Dependence of Amorphous Formation Ability on Intrinsic Parameters in Dy-Gd-Co-Al Alloys[J]. J Mater Sci Technol, 2009, 25(05): 665-668.