| Development of bulk metallic glasses based on the Dy-Al binary eutectic composition |
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| 作者姓名： | 罗林 田瑞 肖学山 |
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| 作者单位： | Institute of Materials，Shanghai University |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （50571054） |
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| 摘 要： | A series of dysprosium-based ternary, quadruple, and quintuple bulk metallic glasses （BMGs） based on Dy-Al binary eutectic composition were obtained with the partial substitution of Co, Gd, and Ni elements, for dysprosium. The results showed that the Dy31Gd25Co20Al24 alloy, which had the best glass forming ability （GFA）, could be cast into an amorphous rod with a diameter of 5 ram. The GFA of alloys was evaluated on the basis of the supercooled liquid region width, 7 parameter, the formation enthalpy, and the equivalent electronegativity difference of amorphous alloys. It was found that the eutectic composition was closely correlated with the GFA of the Dy-based BMGs.
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| 关 键 词： | 玻璃稳定性 共晶复合 金属玻璃 稀土 |
| 收稿时间： | 11 March 2008 |
Development of bulk metallic glasses based on the Dy-Al binary eutectic composition |
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| Lin LUO, Rui TIAN,Xueshan XIAO,.Development of bulk metallic glasses based on the Dy-Al binary eutectic composition[J].Journal of Rare Earths,2008,26(6):813-816. |
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| Authors: | Lin LUO Rui TIAN Xueshan XIAO |
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| Affiliation: | aInstitute of Materials, Shanghai University, Shanghai 200072, China |
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| Abstract: | A series of dysprosium-based ternary, quadruple, and quintuple bulk metallic glasses (BMGs) based on Dy-Al binary eutectic compo-sition were obtained with the partial substitution of Co, Gd, and Ni elements, for dysprosium. The results showed that the Dy31Gd25Co20Al24 alloy, which had the best glass forming ability (GFA), could be cast into an amorphous rod with a diameter of 5 mm. The GFA of alloys was evaluated on the basis of the supercooled liquid region width, γ parameter, the formation enthalpy, and the equivalent electronegativity difference of amor-phous alloys. It was found that the eutectic composition was closely correlated with the GFA of the Dy-based BMGs. |
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| Keywords: | glass forming ability eutectic composition bulk metallic glass rare earths |
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