Calorimetric measurement of the interface energy of pure and calcium doped magnesium oxide

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dc.contributor.authorCASTRO, R.
dc.contributor.authorRicardo Torres
dc.contributor.authorGOUVEA, D.
dc.contributor.authorOrcidhttps://orcid.org/0000-0002-0791-4775
dc.date.accessioned2023-08-26T23:50:02Z
dc.date.available2023-08-26T23:50:02Z
dc.date.issued2009-10-29
dc.description.abstractInterface energetics is of key importance in understanding the evolution of nanoparticles during sintering. During this process, two types of interfaces control the driving forces: the surface and the grain boundary. The knowledge of their energies is therefore of major importance to obtain reliable sintered bodies. The objective of this work was to present a quantitative relationship between the grain boundary energy and the surface energy of MgO and Ca-doped MgO nanoparticles to provide data to better understand the sintering behavior of this system, in particular delineating the thermodynamic basis of using Ca as sintering add. Using a novel and convenient calorimetric procedure, the ratio between the grain boundary energy and the surface energy was determined to be 1.1 for pure MgO and 0.7 for Ca-doped MgO. Based on these, the grain boundary energy of pure MgO and Ca-doped MgO were estimated to be 1.2 J.m-2 and 0.4 J.m-2, respectively. The grain boundary energy decrease caused by calcium doping was attributed to its interface segregation and influenced the sintering behavior by changing the equilibrium dihedral angle in addition to diffusion parameters.
dc.description.firstpage881
dc.description.lastpage891
dc.description.volume2
dc.identifier.citationCASTRO, R.; TORRES, R.; GOUVEA, D. Calorimetric measurement of the interface energy of pure and calcium doped magnesium oxide. Materials Science and Technology Conference and Exhibition 2009, MS and T'09, v. 2, p. 881-891, oct. 2009.
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/5010
dc.relation.ispartofMaterials Science and Technology Conference and Exhibition 2009, MS and T'09
dc.rightsAcesso Restrito
dc.subject.otherlanguageCeramics
dc.subject.otherlanguageInterface energy
dc.subject.otherlanguageMagnesia
dc.subject.otherlanguageSintering
dc.titleCalorimetric measurement of the interface energy of pure and calcium doped magnesium oxide
dc.typeArtigo de evento
fei.scopus.citations0
fei.scopus.eid2-s2.0-77649171407
fei.scopus.subjectCa-doped
fei.scopus.subjectCalcium doping
fei.scopus.subjectCalorimetric measurements
fei.scopus.subjectCeramics
fei.scopus.subjectDiffusion parameters
fei.scopus.subjectDihedral angles
fei.scopus.subjectDriving forces
fei.scopus.subjectGrain-boundary energy
fei.scopus.subjectInterface energetics
fei.scopus.subjectInterface energy
fei.scopus.subjectInterface segregation
fei.scopus.subjectMagnesium oxides
fei.scopus.subjectSintered body
fei.scopus.subjectSintering behaviors
fei.scopus.subjectSurface energies
fei.scopus.updated2024-07-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77649171407&origin=inward
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