Microstructure and Toughness of Seeded Hot-Pressed Si3N4 Ceramics

Microstructure and Toughness of Seeded Hot-Pressed Si3N4 Ceramics

Densification, phase transformation and fracture toughness were studied in hot-pressed Si3N4 seeded by in-house produced large, elongated β-Si3N4 seeds. A mixture of Y2O3-Al2O3 was used as the sintering aid. Concentration of seeds were varied from 0 to 6 wt pct and the sintering time at 1700℃ was va...

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Veröffentlicht in:材料科学技术学报(英文版) 2004-05, Vol.20 (3), p.241-244
Hauptverfasser: D.Bucevac, S.Boskovic, M.Vlajic, V.Krstic
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container_title 材料科学技术学报(英文版)
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creator D.Bucevac
S.Boskovic
M.Vlajic
V.Krstic
description Densification, phase transformation and fracture toughness were studied in hot-pressed Si3N4 seeded by in-house produced large, elongated β-Si3N4 seeds. A mixture of Y2O3-Al2O3 was used as the sintering aid. Concentration of seeds were varied from 0 to 6 wt pct and the sintering time at 1700℃ was varied from 1 to 4 h. Maximum fracture toughness of 9.0 MPam1/2 was measured in samples containing 5 wt pct seeds, hot pressed at 1700℃ for 4 h.
doi_str_mv 10.3321/j.issn:1005-0302.2004.03.001
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title Microstructure and Toughness of Seeded Hot-Pressed Si3N4 Ceramics
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