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Hidden amorphous phase and reentrant supercooled liquid in Pd-Ni-P metallic glasses
This item is licensed under:Creative Commons Attribution 4.0 International
| Title: | Hidden amorphous phase and reentrant supercooled liquid in Pd-Ni-P metallic glasses |
| Authors: | Lan, S. Browse this author | | Ren, Y. Browse this author | | Wei, X. Y. Browse this author | | Wang, B. Browse this author | | Gilbert, E. P. Browse this author | | Shibayama, T. Browse this author | | Watanabe, S. Browse this author →KAKEN DB | | Ohnuma, M. Browse this author | | Wang, X. -L. Browse this author |
| Issue Date: | 17-Mar-2017 |
| Publisher: | Nature Publishing Group |
| Journal Title: | Nature Communications |
| Volume: | 8 |
| Start Page: | 14679 |
| Publisher DOI: | 10.1038/ncomms14679 |
| Abstract: | An anomaly in differential scanning calorimetry has been reported in a number of metallic glass materials in which a broad exothermal peak was observed between the glass and crystallization temperatures. The mystery surrounding this calorimetric anomaly is epitomized by four decades long studies of Pd-Ni-P metallic glasses, arguably the best glass-forming alloys. Here we show, using a suite of in situ experimental techniques, that Pd-Ni-P alloys have a hidden amorphous phase in the supercooled liquid region. The anomalous exothermal peak is the consequence of a polyamorphous phase transition between two supercooled liquids, involving a change in the packing of atomic clusters over medium-range length scales as large as 18Å. With further temperature increase, the alloy reenters the supercooled liquid phase, which forms the room-temperature glass phase on quenching. The outcome of this study raises a possibility to manipulate the structure and hence the stability of metallic glasses through heat treatment. |
| Rights: | http://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/67125 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 渡辺 精一
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