Thermodynamic evidence for cluster ordering in Cu46Zr42Al7Y5 ribbons during glass transition

Zheng, Huizhen; Lv, Yu-Miao; Sun, Qilong; Hu, Lei; Yang, Xiaokun; Yue, Yuanzheng

doi:10.1007/s11434-016-1057-3

Cited by 8 publications

(1 citation statement)

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“…Figure 5 shows that the cluster rearrangement occurs most prominently at medium-range length scales, at the fifth shell ( r =11 Å) or longer. Zheng et al 39. observed three exothermal responses (peaks) in glassy ribbons of Cu 46 Zr 42 Al 7 Y 5 .…”

Section: Discussionmentioning

confidence: 99%

Hidden amorphous phase and reentrant supercooled liquid in Pd-Ni-P metallic glasses

et al. 2017

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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 18 Å. 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.

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Section: Discussionmentioning

confidence: 99%