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dc.contributor.authorWang, Xinfu
dc.contributor.authorWang, Dan
dc.contributor.authorZhu, Bo
dc.contributor.authorLi, Yunjie
dc.contributor.authorHan, Fusheng
dc.date.accessioned2018-05-10T04:22:47Z
dc.date.available2018-05-10T04:22:47Z
dc.date.issued2014
dc.identifier.issn0022-3093en_US
dc.identifier.doi10.1016/j.jnoncrysol.2013.11.015en_US
dc.identifier.urihttp://hdl.handle.net/10072/172142
dc.description.abstractAl76Ni8Ti8Zr4Y4 glassy powder was produced by mechanical alloying process. The phase structure and the crystallization kinetics as well as the thermal stability were investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM) and differential scanning calorimeter (DSC) in non-isothermal mode. The glassy alloy powder shows a distinct one-stage crystallization process with a wide supercooled liquid region. Crystallization occurs by the precipitation and growth of FCC-Al, with intermetallic compound AlTi, AlTi3, Al2Y and Al3Zr. The non-isothermal crystallization kinetics is analyzed by the modified Johnson–Mehl–Avrami (JMA) equation. The values of the Avrami exponent imply that the dominating crystallization mechanism of the present glassy powder is two- or three-dimensional nucleation and growth controlled by diffusion of atoms. The present glass powder has a large supercooled liquid region (SLR) ΔTx value (86 K) and the apparent activation energy for crystallization is as high as 316 kJ/mol. The thermal stability was also evaluated by continuous transformation diagram (CHT) obtained by the extended Kissinger equation. To convince the thermal stability for a very long period of time, a quick annealing of the glassy powder at 700 K for 24 h was conducted and the related result was discussed.en_US
dc.description.peerreviewedYesen_US
dc.languageEnglishen_US
dc.publisherElsevieren_US
dc.relation.ispartofpagefrom111en_US
dc.relation.ispartofpageto116en_US
dc.relation.ispartofjournalJournal of Non-Crystalline Solidsen_US
dc.relation.ispartofvolume385en_US
dc.subject.fieldofresearchMaterials Engineering not elsewhere classifieden_US
dc.subject.fieldofresearchcode091299en_US
dc.titleCrystallization kinetics and thermal stability of mechanically alloyed Al76Ni8Ti8Zr4Y4 glassy powderen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.hasfulltextNo Full Text


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