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

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dc.contributor.authorLan, Sen_AU
dc.contributor.authorRen, Yen_AU
dc.contributor.authorWei, Xen_AU
dc.contributor.authorWang, Ben_AU
dc.contributor.authorGilbert, EPen_AU
dc.contributor.authorShibayama, Ten_AU
dc.contributor.authorWatanabe, Sen_AU
dc.contributor.authorOhnuma, Men_AU
dc.contributor.authorWang, XLen_AU
dc.date.accessioned2021-08-09T22:11:00Zen_AU
dc.date.available2021-08-09T22:11:00Zen_AU
dc.date.issued2017-07-12en_AU
dc.date.statistics2021-08-09en_AU
dc.description.abstractAn 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 half century long studies of Pd-Ni-P metallic glasses, arguably the best glass-forming alloys [1]. Here we show,using a suite of in-situ experimental techniques, including simultaneous small-angle neutron scattering-calorimetry, high-energy X-ray diffraction, and electron microscopy, 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 upon quenching. The outcome of this study raises a possibility to manipulate the structure and hence the stability of metallic glasses through heat-treatment.en_AU
dc.identifier.citationLan, S., Ren, Y., Wei, X., Wang, B., Gilbert, E. P., Shibayama, T., Watanabe, S., Ohnuma, M., & Wang, X.-L. (2017). Hidden amorphous phase and reentrant supercooled liquid in Pd-Ni-P metallic glasses. Paper presented at ICNS 2017 (International Conference on Neutron Scattering), Daejeon, South Korea, 9 to 13 July 2017. Retrieved from: http://www.icns2017.org/program.phpen_AU
dc.identifier.conferenceenddate13 July 2017en_AU
dc.identifier.conferencenameICNS 2017 (International Conference on Neutron Scattering)en_AU
dc.identifier.conferenceplaceDaejeon, South Koreaen_AU
dc.identifier.conferencestartdate9 July 2017en_AU
dc.identifier.urihttp://www.icns2017.org/program.phpen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11279en_AU
dc.language.isoenen_AU
dc.publisherInternational Conference on Neutron Scatteringen_AU
dc.subjectCalorimetryen_AU
dc.subjectGlassen_AU
dc.subjectCrystallizationen_AU
dc.subjectAlloysen_AU
dc.subjectMetallic glassesen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectElectron microscopyen_AU
dc.subjectAmorphous stateen_AU
dc.subjectSupercoolingen_AU
dc.subjectHeat treatmentsen_AU
dc.titleHidden amorphous phase and reentrant supercooled liquid in Pd-Ni-P metallic glassesen_AU
dc.typeConference Abstracten_AU
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