File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Investigation of viscoelastic properties of amorphous selenium near glass transition using depth-sensing indentation

TitleInvestigation of viscoelastic properties of amorphous selenium near glass transition using depth-sensing indentation
Authors
KeywordsActivation energy
Activation volume
Creep
Elastic modulus
Nanoindentation
Selenium
Issue Date2004
PublisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/1539445X.asp
Citation
Soft Materials, 2004, v. 2 n. 2-3, p. 125-144 How to Cite?
AbstractNew procedures involving depth-sensing indentation are used to measure the submicron scale elastic modulus, hardness, viscosity, and activation energy and volume for creep of amorphous selenium below glass transition. The accurate measurement of Young's modulus in a highly viscoelastic situation using depth-sensing indentation remains a challenge, and a creep correction procedure is employed here to measure the modulus. The measured Young's modulus exhibits a strong decreasing trend from ∼10 GPa to 4.4 GPa as temperature increases from ∼302 K to 309 K, in reasonably good agreement with bulk behavior. Two new procedures are also proposed here to measure the viscosity. The measured shear viscosity decreases from ∼1 × 1012 Pa-s to ∼2 × 1010 Pa-s when the temperature increases over the same range, and the variation with temperature is found to obey an Arrehnius rate equation. The activation energy for the viscous creep process is found to be ∼463 kJ/mol. Both the viscosity and the activation energy are lower than the bulk values, and this is thought to be due to the much higher stress levels of over 200 MPa involved in the nanoindentation experiments here. The apparent activation volume exhibits a rising trend from 1.04 × 10-31 to 2.35 × 10-30 m3 over the same temperature range. Copyright © 2004 by Marcel Dekker, Inc.
Persistent Identifierhttp://hdl.handle.net/10722/75596
ISSN
2015 Impact Factor: 1.333
2015 SCImago Journal Rankings: 0.413
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTang, Ben_HK
dc.contributor.authorNgan, AHWen_HK
dc.date.accessioned2010-09-06T07:12:43Z-
dc.date.available2010-09-06T07:12:43Z-
dc.date.issued2004en_HK
dc.identifier.citationSoft Materials, 2004, v. 2 n. 2-3, p. 125-144en_HK
dc.identifier.issn1539-445Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/75596-
dc.description.abstractNew procedures involving depth-sensing indentation are used to measure the submicron scale elastic modulus, hardness, viscosity, and activation energy and volume for creep of amorphous selenium below glass transition. The accurate measurement of Young's modulus in a highly viscoelastic situation using depth-sensing indentation remains a challenge, and a creep correction procedure is employed here to measure the modulus. The measured Young's modulus exhibits a strong decreasing trend from ∼10 GPa to 4.4 GPa as temperature increases from ∼302 K to 309 K, in reasonably good agreement with bulk behavior. Two new procedures are also proposed here to measure the viscosity. The measured shear viscosity decreases from ∼1 × 1012 Pa-s to ∼2 × 1010 Pa-s when the temperature increases over the same range, and the variation with temperature is found to obey an Arrehnius rate equation. The activation energy for the viscous creep process is found to be ∼463 kJ/mol. Both the viscosity and the activation energy are lower than the bulk values, and this is thought to be due to the much higher stress levels of over 200 MPa involved in the nanoindentation experiments here. The apparent activation volume exhibits a rising trend from 1.04 × 10-31 to 2.35 × 10-30 m3 over the same temperature range. Copyright © 2004 by Marcel Dekker, Inc.en_HK
dc.languageengen_HK
dc.publisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/1539445X.aspen_HK
dc.relation.ispartofSoft Materialsen_HK
dc.rightsThis is an electronic version of an article published in [include the complete citation information for the final version of the article as published in the print edition of the journal]. [JOURNAL TITLE] is available online at: http://www.informaworld.com/smpp/ with the open URL of your article.-
dc.subjectActivation energyen_HK
dc.subjectActivation volumeen_HK
dc.subjectCreepen_HK
dc.subjectElastic modulusen_HK
dc.subjectNanoindentationen_HK
dc.subjectSeleniumen_HK
dc.titleInvestigation of viscoelastic properties of amorphous selenium near glass transition using depth-sensing indentationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1539-445X&volume=2&issue=2&spage=125&epage=144&date=2005&atitle=Investigation+of+viscoelastic+properties+of+amorphous+selenium+near+glass+transition+using+depth-sensing+indentationen_HK
dc.identifier.emailTang, B: tangbin@hkucc.hku.hken_HK
dc.identifier.emailNgan, AHW: hwngan@hkucc.hku.hken_HK
dc.identifier.authorityTang, B=rp00081en_HK
dc.identifier.authorityNgan, AHW=rp00225en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1081/SMTS-200056116en_HK
dc.identifier.scopuseid_2-s2.0-22844450408en_HK
dc.identifier.hkuros98212en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-22844450408&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume2en_HK
dc.identifier.issue2-3en_HK
dc.identifier.spage125en_HK
dc.identifier.epage144en_HK
dc.identifier.isiWOS:000230650200004-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridTang, B=24554184100en_HK
dc.identifier.scopusauthoridNgan, AHW=7006827202en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats