The effects of beta-seeds on the electrical and mechanical properties of Si3N4-TiN composites
Апстракт
Si3N4-TiN composites, with varying TiN content from 0-50 wt% and beta-Si3N4 seeds up to 5 wt%, were examined in respect of their electrical resistivity and fracture toughness. The composites are produced by liquid phase sintering using 3%Al2O3+7%Y2O3 as additive. beta-seed particles with different particle shape and aspect ratio were used in this investigation. The electrical conductivity of composites exhibits a percolative behaviour, which is characterised by an abrupt decrease in resistivity in composites with 36 wt%TiN. In composites with beta-Si3N4, for the same percolation concentration of TiN, the electrical resistivity is higher than in composites without seed particles. The fracture toughness shows a considerable improvement in Si3N4-36%TiN with 3 and 5 wt% seeds. High fracture toughness of 6.10 MPa m(1/2) could be achieved due to the controlled bimodal microstructure consisting of elongated beta-Si3N4 incorporated into a composite matrix.
Кључне речи:
Si3N4-TiN composites / beta-seeds / sintering / fracture toughness / electrical resistivityИзвор:
Silicates Industriels, 2004, 69, 7-8, 299-304Напомена:
- 4th International Symposium on Nitrides, Nov 17-19, 2003, Mons, Belgium
Колекције
Институција/група
VinčaTY - JOUR AU - Živković, L. AU - Bošković, Snežana B. AU - Vučković, A AU - Bučevac, Dušan AU - Miljkovic, M PY - 2004 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6466 AB - Si3N4-TiN composites, with varying TiN content from 0-50 wt% and beta-Si3N4 seeds up to 5 wt%, were examined in respect of their electrical resistivity and fracture toughness. The composites are produced by liquid phase sintering using 3%Al2O3+7%Y2O3 as additive. beta-seed particles with different particle shape and aspect ratio were used in this investigation. The electrical conductivity of composites exhibits a percolative behaviour, which is characterised by an abrupt decrease in resistivity in composites with 36 wt%TiN. In composites with beta-Si3N4, for the same percolation concentration of TiN, the electrical resistivity is higher than in composites without seed particles. The fracture toughness shows a considerable improvement in Si3N4-36%TiN with 3 and 5 wt% seeds. High fracture toughness of 6.10 MPa m(1/2) could be achieved due to the controlled bimodal microstructure consisting of elongated beta-Si3N4 incorporated into a composite matrix. T2 - Silicates Industriels T1 - The effects of beta-seeds on the electrical and mechanical properties of Si3N4-TiN composites VL - 69 IS - 7-8 SP - 299 EP - 304 UR - https://hdl.handle.net/21.15107/rcub_vinar_6466 ER -
@article{ author = "Živković, L. and Bošković, Snežana B. and Vučković, A and Bučevac, Dušan and Miljkovic, M", year = "2004", abstract = "Si3N4-TiN composites, with varying TiN content from 0-50 wt% and beta-Si3N4 seeds up to 5 wt%, were examined in respect of their electrical resistivity and fracture toughness. The composites are produced by liquid phase sintering using 3%Al2O3+7%Y2O3 as additive. beta-seed particles with different particle shape and aspect ratio were used in this investigation. The electrical conductivity of composites exhibits a percolative behaviour, which is characterised by an abrupt decrease in resistivity in composites with 36 wt%TiN. In composites with beta-Si3N4, for the same percolation concentration of TiN, the electrical resistivity is higher than in composites without seed particles. The fracture toughness shows a considerable improvement in Si3N4-36%TiN with 3 and 5 wt% seeds. High fracture toughness of 6.10 MPa m(1/2) could be achieved due to the controlled bimodal microstructure consisting of elongated beta-Si3N4 incorporated into a composite matrix.", journal = "Silicates Industriels", title = "The effects of beta-seeds on the electrical and mechanical properties of Si3N4-TiN composites", volume = "69", number = "7-8", pages = "299-304", url = "https://hdl.handle.net/21.15107/rcub_vinar_6466" }
Živković, L., Bošković, S. B., Vučković, A., Bučevac, D.,& Miljkovic, M.. (2004). The effects of beta-seeds on the electrical and mechanical properties of Si3N4-TiN composites. in Silicates Industriels, 69(7-8), 299-304. https://hdl.handle.net/21.15107/rcub_vinar_6466
Živković L, Bošković SB, Vučković A, Bučevac D, Miljkovic M. The effects of beta-seeds on the electrical and mechanical properties of Si3N4-TiN composites. in Silicates Industriels. 2004;69(7-8):299-304. https://hdl.handle.net/21.15107/rcub_vinar_6466 .
Živković, L., Bošković, Snežana B., Vučković, A, Bučevac, Dušan, Miljkovic, M, "The effects of beta-seeds on the electrical and mechanical properties of Si3N4-TiN composites" in Silicates Industriels, 69, no. 7-8 (2004):299-304, https://hdl.handle.net/21.15107/rcub_vinar_6466 .