| A comparative study of the structure and crystallization of bulk metallic amorphous rod Pr60Ni30Al10 and melt-spun metallic amorphous ribbon Al87Ni10Pr3 |
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| 作者姓名： | 孟庆格 李建国 周建坤 |
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| 作者单位： | School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China;School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China;School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China |
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| 基金项目： | Project supported by the National Science Foundation for Outstanding Young Scientists of China (Grant No 50125101). |
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| 摘 要： | Pr-based bulk metallic amorphous （BMA） rods （Pr60Ni30Al10） and Al-based amorphous ribbons （Al87Ni10Pr3） have been prepared by using copper mould casting and single roller melt-spun techniques, respectively. Thermal parameters deduced from differential scanning calorimeter （DSC） indicate that the glass-forming ability （GFA） of Pr60Ni30Al10 BMA rod is far higher than that of Al87Ni10Pr3 ribbon. A comparative study about the differences in structure between the two kinds of glass-forming alloys, superheated viscosity and crystallization are also made. Compared with the amorphous alloy Al87Ni10Pr3, the BMA alloy Pr60Ni30Al10 shows high thermal stability and large viscosity, small diffusivity at the same superheated temperatures. The results of x-Ray diffraction （XRD） and transmission electron microscope （TEM） show the pronounced difference in structure between the two amorphous alloys. Together with crystallization results, the main structure compositions of the amorphous samples are confirmed. It seems that the higher the GFA, the more topological type clusters in the Pr-Ni-Al amorphous alloys, the GFAs of the present glass-forming alloys are closely related to their structures.
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| 关 键 词： | Pr-Ni-Al 非定形合金 无定形结构 结晶化 玻璃成型 固体物理学 |
| 收稿时间： | 2005-10-09 |
| 修稿时间： | 4/4/2006 12:00:00 AM |
A comparative study of the structure and crystallization of bulk metallic amorphous rod Pr60Ni30Al10 and melt-spun metallic amorphous ribbon Al87Ni10Pr3 |
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| Meng Qing-Ge,Li Jian-Guo and Zhou Jian-Kun.A comparative study of the structure and crystallization of bulk metallic amorphous rod Pr60Ni30Al10 and melt-spun metallic amorphous ribbon Al87Ni10Pr3[J].Chinese Physics B,2006,15(7):1549-1557. |
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| Authors: | Meng Qing-Ge Li Jian-Guo and Zhou Jian-Kun |
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| Institution: | School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | Pr-based bulk metallic amorphous (BMA) rods (Pr60Ni30Al10) and
Al-based amorphous ribbons (Al87Ni10Pr3) have been prepared by using
copper mould casting and single roller melt-spun techniques, respectively. Thermal parameters deduced from differential scanning calorimeter (DSC) indicate that the glass-forming ability (GFA) of Pr\xj{60}Ni\xj{30}Al\xj{10} BMA rod is far higher than that of Al87Ni10Pr3 ribbon. A comparative study about the
differences in structure between the two kinds of glass-forming alloys, superheated
viscosity and crystallization are also made. Compared with the amorphous alloy
Al87Ni10Pr3, the BMA alloy Pr60Ni30Al10 shows high thermal stability and large viscosity, small diffusivity at the same superheated temperatures. The results of x-Ray diffraction (XRD) and transmission electron microscope (TEM) show the pronounced difference in structure between the two
amorphous alloys. Together with crystallization results, the main structure compositions of the amorphous samples are confirmed. It seems that the higher the GFA, the more topological type clusters in the Pr--Ni--Al amorphous alloys, the GFAs of the present glass-forming alloys are closely related to their structures. |
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| Keywords: | Pr--Ni--Al amorphous alloys amorphous structure crystallization glass-forming ability (GFA) |
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