Effect of Sn addition on the Cu-Zr-Ti amorphous alloys
| Autor: | Ta-Kai Yang, 楊達凱 |
|---|---|
| Rok vydání: | 2005 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 93 This study examined the effect of Sn element addition on the Cu-Zr-Ti amorphous alloys by mechanical alloying technique. The microstructural evolution during mechanical alloying of the mixed powders was investigated by both X-ray diffraction and scanning electron microscopy (SEM).The phase stabilities of the as-milled powders were studied by DSC measurement. According to the result, after 5 hours of milling, the composition of Cu-Zr-Ti-Sn alloys were all amorphization. The thermal stability of the Cu-Zr-Ti-Sn amorphous powder was also investigated by differential scanning calorimeter (DSC). As the results demonstrated, the amorphous powder were found to exhibit a wide supercooled liquid region before crystallization. The temperature interval of the supercooled liquid region was defined by the difference between Tg and Tx. The highest value of △T was found to exhibit at Cu46Zr30Ti20Sn4 alloys system (93K). Finally, the small addition of Sn element significantly improved the glass forming ability (GFA) of Cu-Zr-Ti amorphous alloys. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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