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Internal Residual Stresses in Sintered and Commercial Low Expansion Li2O-Al2O3-SiO2 Glass-Ceramics
2011; Wiley; Volume: 94; Issue: 4 Linguagem: Inglês
10.1111/j.1551-2916.2010.04220.x
ISSN1551-2916
AutoresFrancisco Carlos Serbena, Viviane Oliveira Soares, Oscar Peitl, Haroldo Cavalcanti Pinto, R. Muccillo, Edgar D. Zanotto,
Tópico(s)Advanced Surface Polishing Techniques
ResumoJournal of the American Ceramic SocietyVolume 94, Issue 4 p. 1206-1214 Internal Residual Stresses in Sintered and Commercial Low Expansion Li2O–Al2O3–SiO2 Glass–Ceramics Francisco C. Serbena, Corresponding Author Francisco C. Serbena Department of Physics, State University of Ponta Grossa (UEPG), CEP 84030-900, Ponta Grossa, PR, Brazil†Author to whom correspondence should be addressed. e-mail: fserbena@uepg.brSearch for more papers by this authorViviane Oliveira Soares, Viviane Oliveira Soares Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), CEP 13565-905, São Carlos, SP, BrazilSearch for more papers by this authorOscar Peitl, Oscar Peitl Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), CEP 13565-905, São Carlos, SP, BrazilSearch for more papers by this authorHaroldo Pinto, Haroldo Pinto Department of Materials, Aeronautic and Automotive Engineering, Engineering School of São Carlos (EESC), University of São Paulo (USP), CEP 13566-590, São Carlos, SP, BrazilSearch for more papers by this authorReginaldo Muccillo, Reginaldo Muccillo Center of Science and Technology of Materials, Energy and Nuclear Research Institute (IPEN), CEP 05508-900,São Paulo, SP, BrazilSearch for more papers by this authorEdgar D. Zanotto, Edgar D. Zanotto Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), CEP 13565-905, São Carlos, SP, BrazilSearch for more papers by this author Francisco C. Serbena, Corresponding Author Francisco C. Serbena Department of Physics, State University of Ponta Grossa (UEPG), CEP 84030-900, Ponta Grossa, PR, Brazil†Author to whom correspondence should be addressed. e-mail: fserbena@uepg.brSearch for more papers by this authorViviane Oliveira Soares, Viviane Oliveira Soares Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), CEP 13565-905, São Carlos, SP, BrazilSearch for more papers by this authorOscar Peitl, Oscar Peitl Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), CEP 13565-905, São Carlos, SP, BrazilSearch for more papers by this authorHaroldo Pinto, Haroldo Pinto Department of Materials, Aeronautic and Automotive Engineering, Engineering School of São Carlos (EESC), University of São Paulo (USP), CEP 13566-590, São Carlos, SP, BrazilSearch for more papers by this authorReginaldo Muccillo, Reginaldo Muccillo Center of Science and Technology of Materials, Energy and Nuclear Research Institute (IPEN), CEP 05508-900,São Paulo, SP, BrazilSearch for more papers by this authorEdgar D. Zanotto, Edgar D. Zanotto Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), CEP 13565-905, São Carlos, SP, BrazilSearch for more papers by this author First published: 14 January 2011 https://doi.org/10.1111/j.1551-2916.2010.04220.xCitations: 46 D. J. Green—contributing editor This work was financially supported by CNPq/Brazil-process no. 151917/2006-0, FAPESP/Brazil-contracts no. 07/08179-9 and 05/53241-9, CNPq and the Brazilian Synchrotron Light Laboratory/MCT research proposals XRD1–5824 and XRD1-6712. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract We performed Synchrotron X-ray diffraction (XRD) analyses of internal residual stresses in monolithic samples of a newly developed Li2O–Al2O3–SiO2 (LAS) glass–ceramic produced by sintering and in a commercial LAS glass–ceramic, CERAN®, produced by the traditional crystal nucleation and growth treatments. The elastic constants were measured by instrumented indentation and a pulse-echo technique. The thermal expansion coefficient of virgilite was determined by high temperature XRD and dilatometry. The c-axis contracts with the increasing temperature whereas the a-axis does not vary significantly. Microcracking of the microstructure affects the thermal expansion coefficients measured by dilatometry and thermal expansion hysteresis is observed for the sintered glass–ceramic as well as for CERAN®. The measured internal stress is quite low for both glass–ceramics and can be explained by theoretical modeling if the high volume fraction of the crystalline phase (virgilite) is considered. Using a modified Green model, the calculated critical (glass) island diameter for spontaneous cracking agreed with experimental observations. The experimental data collected also allowed the calculation of the critical crystal grain diameters for grain-boundary microcracking due to the anisotropy of thermal expansion of virgilite and for microcracking in the residual glass phase surrounding the virgilite particles. All these parameters are important for the successful microstructural design of sintered glass–ceramics. Citing Literature Volume94, Issue4April 2011Pages 1206-1214 RelatedInformation
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