Densification and phase transformation of Si3N4 in the presence of mechanically activated BaCO3-Al2O3-SiO2 mixture
Апстракт
Densification as well as the alpha -- GT beta phase transformation of Si3N4 were monitored as a function of activation time of the BaCO3-Al2O3-SiO2 additive mixture. The composition of the ternary mixture corresponded to celsian (BaAl2Si2O8-BAS). Previously, mechanically activated powder mixtures for various lengths of time were added to Si3N4 in the amount of 10-30%. Sintering was performed at 1650-1700 degreesC in nitrogen atmosphere up to 8 h. The changes in densification degree, as well as phase composition, were followed as a function of heating time and the time of mechanical activation of the additive mixture. The results obtained showed that mechanical activation retarded densification in samples heated up to 1700 degreesC. On the other hand, for the constant sintering time, alpha -- GT beta transformation of Si3N4, was enhanced with increasing activation time, and the amount of additives. (C) 2001 Elsevier Science B.V. All rights reserved.
Кључне речи:
Si3N4 composites / BAS / mechanical activation / phase transitionИзвор:
Powder Technology, 2001, 120, 3, 194-198
DOI: 10.1016/S0032-5910(01)00270-4
ISSN: 0032-5910
WoS: 000171516500007
Scopus: 2-s2.0-0035935226
Колекције
Институција/група
VinčaTY - JOUR AU - Bošković, Snežana B. AU - Kosanovic, D AU - Zec, Slavica PY - 2001 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2465 AB - Densification as well as the alpha -- GT beta phase transformation of Si3N4 were monitored as a function of activation time of the BaCO3-Al2O3-SiO2 additive mixture. The composition of the ternary mixture corresponded to celsian (BaAl2Si2O8-BAS). Previously, mechanically activated powder mixtures for various lengths of time were added to Si3N4 in the amount of 10-30%. Sintering was performed at 1650-1700 degreesC in nitrogen atmosphere up to 8 h. The changes in densification degree, as well as phase composition, were followed as a function of heating time and the time of mechanical activation of the additive mixture. The results obtained showed that mechanical activation retarded densification in samples heated up to 1700 degreesC. On the other hand, for the constant sintering time, alpha -- GT beta transformation of Si3N4, was enhanced with increasing activation time, and the amount of additives. (C) 2001 Elsevier Science B.V. All rights reserved. T2 - Powder Technology T1 - Densification and phase transformation of Si3N4 in the presence of mechanically activated BaCO3-Al2O3-SiO2 mixture VL - 120 IS - 3 SP - 194 EP - 198 DO - 10.1016/S0032-5910(01)00270-4 ER -
@article{ author = "Bošković, Snežana B. and Kosanovic, D and Zec, Slavica", year = "2001", abstract = "Densification as well as the alpha -- GT beta phase transformation of Si3N4 were monitored as a function of activation time of the BaCO3-Al2O3-SiO2 additive mixture. The composition of the ternary mixture corresponded to celsian (BaAl2Si2O8-BAS). Previously, mechanically activated powder mixtures for various lengths of time were added to Si3N4 in the amount of 10-30%. Sintering was performed at 1650-1700 degreesC in nitrogen atmosphere up to 8 h. The changes in densification degree, as well as phase composition, were followed as a function of heating time and the time of mechanical activation of the additive mixture. The results obtained showed that mechanical activation retarded densification in samples heated up to 1700 degreesC. On the other hand, for the constant sintering time, alpha -- GT beta transformation of Si3N4, was enhanced with increasing activation time, and the amount of additives. (C) 2001 Elsevier Science B.V. All rights reserved.", journal = "Powder Technology", title = "Densification and phase transformation of Si3N4 in the presence of mechanically activated BaCO3-Al2O3-SiO2 mixture", volume = "120", number = "3", pages = "194-198", doi = "10.1016/S0032-5910(01)00270-4" }
Bošković, S. B., Kosanovic, D.,& Zec, S.. (2001). Densification and phase transformation of Si3N4 in the presence of mechanically activated BaCO3-Al2O3-SiO2 mixture. in Powder Technology, 120(3), 194-198. https://doi.org/10.1016/S0032-5910(01)00270-4
Bošković SB, Kosanovic D, Zec S. Densification and phase transformation of Si3N4 in the presence of mechanically activated BaCO3-Al2O3-SiO2 mixture. in Powder Technology. 2001;120(3):194-198. doi:10.1016/S0032-5910(01)00270-4 .
Bošković, Snežana B., Kosanovic, D, Zec, Slavica, "Densification and phase transformation of Si3N4 in the presence of mechanically activated BaCO3-Al2O3-SiO2 mixture" in Powder Technology, 120, no. 3 (2001):194-198, https://doi.org/10.1016/S0032-5910(01)00270-4 . .