https://scholars.lib.ntu.edu.tw/handle/123456789/424981
標題: | Microstructure and mechanical properties of Zr-Ti-Cu-Nd metallic glass composites | 作者: | Wu Y.H. Wang C. Hsueh C.H. Li T.H. Chang C.H. Chen H.C. Jang J.S.C. Huang J.C. Ma Z.H. CHUN-HWAY HSUEH |
關鍵字: | Enthalpy;Mechanical properties;Metallic glasses;Microstructure;Precipitate | 公開日期: | 2017 | 卷: | 702 | 起(迄)頁: | 318-326 | 來源出版物: | Journal of Alloys and Compounds | 摘要: | Different amounts of Nd were added to fabricate Zr-Ti-Cu-Nd metallic glass ribbons using melt-spinning and both the microstructure and mechanical properties were examined. Because of the different mixing enthalpies between elements, liquid-phase-separation occurs during the cooling process. While Nd separated from Zr and Ti, it precipitated with Cu. This was verified using energy-dispersive X-ray spectroscopy. Also, the cooling rate varies through the thickness of the ribbon during melt spinning which, in turn, would result in different microstructures. While the ribbon was fully amorphous on the roller side, it had fine and coarse precipitates, respectively, on the surface side and in the middle thickness of the ribbon. Using modulus mapping, the matrix showed the higher storage modulus than the precipitates while the precipitates had the higher loss modulus. The micropillar compression tests showed the enhanced ductility of the ribbon with Nd doping, and the micrographs showed abundant shear bands and shear-cutting of precipitates by the shear band after compression. ? 2017 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/424981 | ISSN: | 09258388 | DOI: | 10.1016/j.jallcom.2017.01.269 |
顯示於: | 材料科學與工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。