Sintering of Si3N4 with Li-exchanged zeolite additive
Apstrakt
This paper deals with the densification and phase transformation of Si3N4 with additives of Li-exchanged zeolite during pressureless sintering at significantly reduced temperatures. Dilatometric shrinkage data show that the first liquid forms as low as 1080 degrees C. Upon sintering at 1500 degrees C the bulk density increases to more than 95% of the theoretical density without phase transformation from alpha-S3N4 to beta-Si3N4, i.e. the phase transformation lags behind the densification process. Above 1500 degrees C the secondary phase is completely converted into a glass and the alpha-to-beta transformation takes place. Under these conditions the grain growth is anisotropic, leading to a microstructure which has potential for enhanced fracture toughness. The results show that a very effective low-temperature sintering additive for silicon nitride can be obtained from Li-exchanged zeolite.
Ključne reči:
silicon nitride / LiAlSiO4 additive / densification / phase transformation / microstructureIzvor:
International Journal of Materials Research, 2006, 97, 9, 1264-1267
DOI: 10.3139/146.101367
ISSN: 1862-5282
WoS: 000241402700012
Scopus: 2-s2.0-33750064285
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Matović, Branko AU - Rixecker, Georg AU - Bošković, Snežana B. AU - Aldinger, Fritz PY - 2006 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3103 AB - This paper deals with the densification and phase transformation of Si3N4 with additives of Li-exchanged zeolite during pressureless sintering at significantly reduced temperatures. Dilatometric shrinkage data show that the first liquid forms as low as 1080 degrees C. Upon sintering at 1500 degrees C the bulk density increases to more than 95% of the theoretical density without phase transformation from alpha-S3N4 to beta-Si3N4, i.e. the phase transformation lags behind the densification process. Above 1500 degrees C the secondary phase is completely converted into a glass and the alpha-to-beta transformation takes place. Under these conditions the grain growth is anisotropic, leading to a microstructure which has potential for enhanced fracture toughness. The results show that a very effective low-temperature sintering additive for silicon nitride can be obtained from Li-exchanged zeolite. T2 - International Journal of Materials Research T1 - Sintering of Si3N4 with Li-exchanged zeolite additive VL - 97 IS - 9 SP - 1264 EP - 1267 DO - 10.3139/146.101367 ER -
@article{ author = "Matović, Branko and Rixecker, Georg and Bošković, Snežana B. and Aldinger, Fritz", year = "2006", abstract = "This paper deals with the densification and phase transformation of Si3N4 with additives of Li-exchanged zeolite during pressureless sintering at significantly reduced temperatures. Dilatometric shrinkage data show that the first liquid forms as low as 1080 degrees C. Upon sintering at 1500 degrees C the bulk density increases to more than 95% of the theoretical density without phase transformation from alpha-S3N4 to beta-Si3N4, i.e. the phase transformation lags behind the densification process. Above 1500 degrees C the secondary phase is completely converted into a glass and the alpha-to-beta transformation takes place. Under these conditions the grain growth is anisotropic, leading to a microstructure which has potential for enhanced fracture toughness. The results show that a very effective low-temperature sintering additive for silicon nitride can be obtained from Li-exchanged zeolite.", journal = "International Journal of Materials Research", title = "Sintering of Si3N4 with Li-exchanged zeolite additive", volume = "97", number = "9", pages = "1264-1267", doi = "10.3139/146.101367" }
Matović, B., Rixecker, G., Bošković, S. B.,& Aldinger, F.. (2006). Sintering of Si3N4 with Li-exchanged zeolite additive. in International Journal of Materials Research, 97(9), 1264-1267. https://doi.org/10.3139/146.101367
Matović B, Rixecker G, Bošković SB, Aldinger F. Sintering of Si3N4 with Li-exchanged zeolite additive. in International Journal of Materials Research. 2006;97(9):1264-1267. doi:10.3139/146.101367 .
Matović, Branko, Rixecker, Georg, Bošković, Snežana B., Aldinger, Fritz, "Sintering of Si3N4 with Li-exchanged zeolite additive" in International Journal of Materials Research, 97, no. 9 (2006):1264-1267, https://doi.org/10.3139/146.101367 . .