000101612 001__ 101612
000101612 005__ 20220405150420.0
000101612 0247_ $$2doi$$a10.1016/j.jeurceramsoc.2020.05.015
000101612 0248_ $$2sideral$$a117944
000101612 037__ $$aART-2020-117944
000101612 041__ $$aeng
000101612 100__ $$0(orcid)0000-0001-6337-5510$$aMoshtaghioun, B.M.$$uUniversidad de Zaragoza
000101612 245__ $$aMg2SiO4-MgAl2O4 directionally solidified eutectics: Hardness dependence modelled through an array of screw dislocations
000101612 260__ $$c2020
000101612 5060_ $$aAccess copy available to the general public$$fUnrestricted
000101612 5203_ $$aMg2SiO4-MgAl2O4 eutectic ceramics have been fabricated by means of the laser floating zone (LFZ) technique. The microstructure has revealed as an unusual one at lower growth rate, composed of broken lamellae of MgAl2O4 distributed randomly along one matrix, composed of Mg2SiO4. At higher growth rates, a cell structure with intra-cell lamella structure is dominant. Contrary to most eutectic systems, hardness is not dependent upon the inter-spacing, but it does depend on one characteristic length of lamellae: their perimeter. One simple model based upon the dislocation is proposed, which successfully accounts for such extraordinary hardness law. Accordingly, Mg2SiO4-MgAl2O4 eutectic ceramics fabricated at 50 mm/h growth rate with the smallest MgAl2O4 lamella perimeter favorably showed more elevated hardness (13.4 GPa from Vickers indentation and 15.3 GPa from nanoindentation) and strength (~430 MPa) than those found in the monolithic Mg2SiO4 matrix.
000101612 536__ $$9info:eu-repo/grantAgreement/ES/DGA-FEDER/T02-17R$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2015-71411-R$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2016-77769R$$9info:eu-repo/grantAgreement/ES/MINECO/Juan de la Cierva Program
000101612 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000101612 590__ $$a5.302$$b2020
000101612 591__ $$aMATERIALS SCIENCE, CERAMICS$$b2 / 29 = 0.069$$c2020$$dQ1$$eT1
000101612 592__ $$a1.204$$b2020
000101612 593__ $$aMaterials Chemistry$$c2020$$dQ1
000101612 593__ $$aCeramics and Composites$$c2020$$dQ1
000101612 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000101612 700__ $$aGomez-Garcia, D.
000101612 700__ $$0(orcid)0000-0003-2242-6822$$aPeña, J.I.$$uUniversidad de Zaragoza
000101612 7102_ $$15001$$2065$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Cienc.Mater. Ingen.Metal.
000101612 773__ $$g40, 12 (2020), 4171-4176$$pJ. Eur. Ceram. Soc.$$tJournal of the European Ceramic Society$$x0955-2219
000101612 8564_ $$s783852$$uhttps://zaguan.unizar.es/record/101612/files/texto_completo.pdf$$yPostprint
000101612 8564_ $$s2642614$$uhttps://zaguan.unizar.es/record/101612/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000101612 909CO $$ooai:zaguan.unizar.es:101612$$particulos$$pdriver
000101612 951__ $$a2022-04-05-14:39:17
000101612 980__ $$aARTICLE