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http://hdl.handle.net/10773/20391
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DC Field | Value | Language |
---|---|---|
dc.contributor.author | Torres, P. M. C. | pt |
dc.contributor.author | Abrantes, J. C. C. | pt |
dc.contributor.author | Kaushal, A. | pt |
dc.contributor.author | Pina, S. | pt |
dc.contributor.author | Doebelin, N. | pt |
dc.contributor.author | Bohner, M. | pt |
dc.contributor.author | Ferreira, J. M. F. | pt |
dc.date.accessioned | 2017-12-07T19:45:33Z | - |
dc.date.issued | 2016 | pt |
dc.identifier.issn | 0955-2219 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/20391 | - |
dc.description.abstract | Alpha and beta-tricalcium phosphates are allotropic phases which play a very important role as bone graft substitutes, namely in calcium phosphate cements. Despite extensive research efforts, contradictory reports exist on the importance of quenching for maintaining alpha-TCP purity. The role of calcium pyrophosphate impurities derived from a certain calcium-deficiency, hydroxyapatite impurities derived from calcium excess, and various ionic substitutions on thermal stability of these phases was not yet fully disclosed. The present work reports on the kinetics of alpha <->beta-TCP phase transformations of calcium-deficient TCP powders with different Mg-doping extents (0-5 mol%) prepared by precipitation. Mg clearly enhanced the thermal stability of beta-TCP. The effect of cooling rate was more complex and interdependent on the Mg content and the heat treatment schedule. High alpha-TCP contents were retained upon cooling at 5 degrees C min(-1) for Mg <= 1 mol% or upon quenching from 1550 degrees C for Mg contents <= 2 mol%. (C) 2015 Elsevier Ltd. All rights reserved. | pt |
dc.language.iso | eng | pt |
dc.publisher | ELSEVIER SCI LTD | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147332/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F62021%2F2009/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F77598%2F2011/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F64119%2F2009/PT | pt |
dc.rights | restrictedAccess | por |
dc.subject | BETA-TRICALCIUM PHOSPHATE | pt |
dc.subject | NEUTRON POWDER DIFFRACTION | pt |
dc.subject | X-RAY-DIFFRACTION | pt |
dc.subject | ALPHA-TRICALCIUM | pt |
dc.subject | SETTING REACTION | pt |
dc.subject | HIGH-TEMPERATURE | pt |
dc.subject | BONE | pt |
dc.subject | SYSTEM | pt |
dc.subject | SUBSTITUTION | pt |
dc.subject | CEMENT | pt |
dc.title | Influence of Mg-doping, calcium pyrophosphate impurities and cooling rate on the allotropic alpha <->beta-tricalcium phosphate phase transformations | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 817 | pt |
degois.publication.issue | 3 | pt |
degois.publication.lastPage | 827 | pt |
degois.publication.title | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | pt |
degois.publication.volume | 36 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.relation.publisherversion | 10.1016/j.jeurceramsoc.2015.09.037 | pt |
dc.identifier.doi | 10.1016/j.jeurceramsoc.2015.09.037 | pt |
Appears in Collections: | CICECO - Artigos |
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