| Medium-Range Order Structure and Fragility of Superheated Melts of Amorphous CuHf Alloys |
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| 作者姓名： | 边秀房 孙保安 胡丽娜 |
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| 作者单位： | Key Laboratory of Liquid Structure and Heredity of Materials of Ministry of Education, Shandong University, Jinan 250061 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 50231040 and 50471052, and Natural Science Foundation of Shandong Province under Grant No Z2004F02. |
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| 摘 要： |
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| 关 键 词： | 介质范围 脆弱性 过热融化 无定形CuHf合金 |
| 收稿时间： | 2006-02-23 |
| 修稿时间： | 2006-02-23 |
Medium-Range Order Structure and Fragility of Superheated Melts of Amorphous CuHf Alloys |
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| BIAN Xiu-Fang, SUN Bao-An, HU Li-Na.Medium-Range Order Structure and Fragility of Superheated Melts of Amorphous CuHf Alloys[J].Chinese Physics Letters,2006,23(7):1864-1867. |
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| Authors: | BIAN Xiu-Fang SUN Bao-An HU Li-Na |
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| Abstract: | The structural factors of amorphous CuHf alloys at different temperatures are determined by using a high temperature x-ray diffractometer. It is found that not only the short-range order structure but also the medium-range order structure exists in amorphous CuHf alloys. The dynamic viscosities of CuHf alloy melts are measured by a torsional oscillation viscometer. The fragility of superheated melts of CuHf alloys is calculated based on the viscosity data. The experimental results show that the glass-forming ability of the CuHf alloys is closely related to the fragility of their superheated melt. The relationship between the medium-range order structures and the fragility of superheated melts has also been established in amorphous CuHf alloys. In contrast to the fragility of supercooled liquids, the fragility of superheated liquids promises a better approach to reflecting the dynamics of glass forming liquids. |
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