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Phase evolution of Si3N4 ceramic with additives from Li2O-Y2O3
dc.creator | Matović, Branko | |
dc.creator | Bošković, Snežana B. | |
dc.date.accessioned | 2018-03-03T14:04:10Z | |
dc.date.available | 2018-03-03T14:04:10Z | |
dc.date.issued | 2004 | |
dc.identifier.issn | 0255-5476 | |
dc.identifier.uri | https://vinar.vin.bg.ac.rs/handle/123456789/6438 | |
dc.description.abstract | This 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.rights | restrictedAccess | en |
dc.source | Materials Science Forum | en |
dc.subject | secondary phase | en |
dc.subject | Si3N4 | en |
dc.subject | x-ray diffraction | en |
dc.title | Phase evolution of Si3N4 ceramic with additives from Li2O-Y2O3 | en |
dc.type | article | en |
dcterms.abstract | Босковиц, С; Матовић Бранко; | |
dc.citation.volume | 453-454 | |
dc.citation.spage | 447 | |
dc.citation.epage | 451 | |
dc.identifier.wos | 000221535700074 | |
dc.identifier.doi | 10.4028/www.scientific.net/MSF.453-454.447 | |
dc.citation.rank | M23 | |
dc.description.other | Progress in Advanced Materials and Processes, 5th Conference of the Yugoslav-Materials-Research-Society (Yu-MRS 2003), Sep 15-19, 2003, Herceg Novi, Yugoslavia | en |
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