| Effects of Microalloying on Glass Forming Ability and Thermodynamic Fragility of Cu-Pr-Based Amorphous Alloys |
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| 引用本文： | 李雪莲 边秀房 郭晶 赵岩 武玉琴 孙保安. Effects of Microalloying on Glass Forming Ability and Thermodynamic Fragility of Cu-Pr-Based Amorphous Alloys[J]. 中国稀土学报(英文版), 2007, 25(5): 615-618. DOI: 10.1016/S1002-0721(07)60573-0 |
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| 作者姓名： | 李雪莲 边秀房 郭晶 赵岩 武玉琴 孙保安 |
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| 作者单位： | Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061, China |
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| 基金项目： | 国家自然科学基金;山东省自然科学基金 |
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| 摘 要： | The effects of microalloying of Ti and B on the glass formation of Cu60Pr30Ni10Al10-2xTixBx（x = 0, 0.05% （atom fraction）） amorphous alloys was investigated using differential scanning calorimetry （DSC） and X-ray diffraction （XRD）. XRD analysis showed that mieroalloying with 0.05% Ti and 0.05% B improved the glass forming ability （GFA）. The smaller difference in the Gibbs free energy between the liquid and crystalline states at the glass transition temperature （△G1-X（Tg）） and the smaller thermodynamic fragility index （△Sf/Tm, where ASf is the entropy of fusion, and Tm is the melting temperature） after mieroalloying correlated with the higher GFA.
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| 关 键 词： | 合金 玻璃 能量 稀土元素 化学结构 |
| 文章编号： | 1002-0721（2007）05-0615-04 |
| 收稿时间： | 2006-11-20 |
| 修稿时间： | 2006-11-20 |
Effects of Microalloying on Glass Forming Ability and Thermodynamic Fragility of Cu-Pr-Based Amorphous Alloys |
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| Li , Bian Xiufang, Guo Jing, Zhao Yan, Wu Yuqin,Sun Bao''an. Effects of Microalloying on Glass Forming Ability and Thermodynamic Fragility of Cu-Pr-Based Amorphous Alloys[J]. Journal of Rare Earths, 2007, 25(5): 615-618. DOI: 10.1016/S1002-0721(07)60573-0 |
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| Authors: | Li Bian Xiufang Guo Jing Zhao Yan Wu Yuqin Sun Bao''an |
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| Affiliation: | Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061, China |
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| Abstract: | The effects of microalloying of Ti and B on the glass formation of Cu60Pr30Ni10Al10–2xTixBx(x = 0, 0.05%(atom fraction) amorphous alloys was investigated using differential scanning calorimetry (DSC) and X-ray diffraction (XRD). XRD analysis showed that microalloying with 0.05% Ti and 0.05% B improved the glass forming ability (GFA). The smaller difference in the Gibbs free energy between the liquid and crystalline states at the glass transition temperature (ΔG1-x(Tg) and the smaller thermodynamic fragility index (ΔSf/Tm, where ΔSf is the entropy of fusion, and Tm is the melting temperature) after microalloying correlated with the higher GFA. |
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| Keywords: | microalloying glass forming ability fragility difference in Gibbs free energy rare earths |
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