Microstructure and devitrification behavior of melt-spun Al-rich metallic glasses and nanostructured composites
文献类型：期刊论文
| 作者 | S. C. Tjong ; J. Q. Wang |
| 刊名 | Zeitschrift Fur Metallkunde
 |
| 出版日期 | 2001 |
| 卷号 | 92期号:6页码:610-616 |
| 关键词 | metallic glasses nanostructured composites microstructure devitrification behavior amorphous-alloys crystallization kinetics nanocrystal development atomic-structure nucleation fe ni |
| ISSN号 | 0044-3093 |
| 中文摘要 | Melt-spun Al-rich metallic glasses and nanostructured composites were synthesized under various quenching rates. Differential scanning calorimetry (DSC), X-ray diffraction and transmission electron microscopic techniques were employed to study the microstructure and devitrification of these samples in more details. The microstructure obtained is strongly sensitive to the quenching rates used. A reduction of the quenching rate from 50 to 9 m/s changed the structure from an amorphous single phase to the coexistence of alpha -Al nanocrystals and amorphous phase, and finally to a combination of alpha -Al, Al-3(Ni,Fe), Al11Ce3 and amorphous matrix. Upon devitrifying, a two-stage crystallization reaction was observed but the glass transition was not detected in these samples. The absence of glass transition was presumably due to the formation of pre-existing nuclei. Isothermal and nonisothermal DSC measurements indicated that the first crystallization was associated with the growth of alpha -Al nanocrystals controlled by the volume diffusion with a small activation energy of 1.3-1.7eV. The second crystallization was derived from the growth of Al-3(Ni,Fe) and Al11Ce3 nanophases. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/36819]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | S. C. Tjong,J. Q. Wang. Microstructure and devitrification behavior of melt-spun Al-rich metallic glasses and nanostructured composites[J]. Zeitschrift Fur Metallkunde,2001,92(6):610-616. |
| APA | S. C. Tjong,&J. Q. Wang.(2001).Microstructure and devitrification behavior of melt-spun Al-rich metallic glasses and nanostructured composites.Zeitschrift Fur Metallkunde,92(6),610-616. |
| MLA | S. C. Tjong,et al."Microstructure and devitrification behavior of melt-spun Al-rich metallic glasses and nanostructured composites".Zeitschrift Fur Metallkunde 92.6(2001):610-616. |
入库方式： OAI收割
来源：金属研究所
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