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dc.creatorMatović, Branko
dc.creatorBošković, Snežana B.
dc.date.accessioned2018-03-03T14:04:10Z
dc.date.available2018-03-03T14:04:10Z
dc.date.issued2004
dc.identifier.issn0255-5476
dc.identifier.urihttps://vinar.vin.bg.ac.rs/handle/123456789/6438
dc.description.abstractThis paper deals with the alpha- to beta- Si3N4 phase transformation during pressureless sintering of Si3N4 with LiYO2 as a sintering additive. The phase evolution after heat treatments in the temperature range from 1200 to 1500degreesC shows that alpha-Si3N4 and beta-Si3N4 are the main crystalline phases in all stages of annealing. At 1200degreesC, the initial LiYO2 sintering additive completely disappears. X-ray patterns show a remarkable broadening of diffraction lines in the regions around 27-29degrees and 32-34degrees 2theta, which can be ascribed to the Y-5(SiO4)(3)N (N-apatite) phase. This indicates that the nucleation and formation of crystalline N-apatite takes place at this temperature, which is the onset of liquid formation. At 1600degreesC, a complete conversion of the secondary phase into the liquid one and of alpha- to beta-Si3N4 takes place.en
dc.rightsrestrictedAccessen
dc.sourceMaterials Science Forumen
dc.subjectsecondary phaseen
dc.subjectSi3N4en
dc.subjectx-ray diffractionen
dc.titlePhase evolution of Si3N4 ceramic with additives from Li2O-Y2O3en
dc.typearticleen
dcterms.abstractБосковиц, С; Матовић Бранко;
dc.citation.volume453-454
dc.citation.spage447
dc.citation.epage451
dc.identifier.wos000221535700074
dc.identifier.doi10.4028/www.scientific.net/MSF.453-454.447
dc.citation.rankM23
dc.description.otherProgress in Advanced Materials and Processes, 5th Conference of the Yugoslav-Materials-Research-Society (Yu-MRS 2003), Sep 15-19, 2003, Herceg Novi, Yugoslaviaen


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