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Observation of two elastic thresholds in GeₓAsySe₁ˍₓ ˍy glasses

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Wang, R. P.; Smith, A.; Luther-Davies, B.; Kokkonen, H.; Jackson, I.

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We have prepared GeₓAsySe1−x−yglasses with mean coordination numbers (MCNs) from 2.2 to 2.86. Tg was found to generally increase with increasing MCN while the glass density showed a maximum at MCN≈2.45 and a minimum at MCN≈2.65. The elastic moduli of the glasses were estimated from the shear and compressional wave velocitiesmeasured by ultrasonic pulse interferometry. For the first time we simultaneously observed two elastictransition thresholds, the first at MCN≈2.45 and the second at...[Show more]

dc.contributor.authorWang, R. P.
dc.contributor.authorSmith, A.
dc.contributor.authorLuther-Davies, B.
dc.contributor.authorKokkonen, H.
dc.contributor.authorJackson, I.
dc.date.accessioned2015-12-17T23:55:38Z
dc.date.available2015-12-17T23:55:38Z
dc.identifier.issn0021-8979
dc.identifier.urihttp://hdl.handle.net/1885/95089
dc.description.abstractWe have prepared GeₓAsySe1−x−yglasses with mean coordination numbers (MCNs) from 2.2 to 2.86. Tg was found to generally increase with increasing MCN while the glass density showed a maximum at MCN≈2.45 and a minimum at MCN≈2.65. The elastic moduli of the glasses were estimated from the shear and compressional wave velocitiesmeasured by ultrasonic pulse interferometry. For the first time we simultaneously observed two elastictransition thresholds, the first at MCN≈2.45 and the second at MCN≈2.65, which appear closely correlated with changes in the glass microstructure. The elastic moduli of two groups of samples with the same MCN=2.4 and 2.64 but different compositions suggest that the chemical compositions also have an influence on the elastic properties.
dc.description.sponsorshipThis research is supported by the Australian Research Council through its Centres of Excellence and Federation Fellow Programs.
dc.publisherAmerican Institute of Physics (AIP)
dc.rightshttp://www.sherpa.ac.uk/romeo/issn/0021-8979..."Publishers version/PDF may be used on author's personal website, institutional website or institutional repository" from SHERPA/RoMEO site (as at 18/12/15). Copyright 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Applied Physics and may be found at https://doi.org/10.1063/1.3079806
dc.sourceJournal of Applied Physics
dc.subjectKeywords: Glass; Glass transition; Chemical compositions; Compressional wave velocities; Elastic properties; Glass densities; Glass microstructures; Mean coordination numbers; Ultrasonic pulse; Elastic moduli
dc.titleObservation of two elastic thresholds in GeₓAsySe₁ˍₓ ˍy glasses
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume105
dc.date.issued2009-03-12
local.identifier.absfor020406
local.identifier.ariespublicationu9503261xPUB286
local.publisher.urlhttps://www.aip.org/
local.type.statusPublished Version
local.contributor.affiliationWang, Rongping, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Laser Physics Centre, The Australian National University
local.contributor.affiliationSmith, Anita, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Laser Physics Centre, The Australian National University
local.contributor.affiliationLuther-Davies, Barry, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Laser Physics Centre, The Australian National University
local.contributor.affiliationKokkonen, Harri, College of Physical and Mathematical Sciences, CPMS Research School of Earth Sciences, RSES General, The Australian National University
local.contributor.affiliationJackson, Ian, College of Physical and Mathematical Sciences, CPMS Research School of Earth Sciences, RSES General, The Australian National University
local.bibliographicCitation.issue5
local.bibliographicCitation.startpage056109
local.bibliographicCitation.lastpage1/3
local.identifier.doi10.1063/1.3079806
local.identifier.absseo970104
dc.date.updated2016-02-24T12:01:33Z
local.identifier.scopusID2-s2.0-62549091920
local.identifier.thomsonID000264156300119
CollectionsANU Research Publications

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