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- W2004381454 abstract "Abstract Five different stabilizing cations (Y, Yb, Dy, Sm, Nd) were investigated on an α-SiAlON composition, deliberately shifted to the Al 2 O 3 rich area corresponding to M 0.445 Si 9.998 Al 2.003 O 0.668 N1 5.333, with respect to the reaction sequences, densification behaviour and mechanical properties. The analysis of the reaction sequences show that the formation of α-SiAlON involves the intermediate formation of aluminate, garnet, melilite and a nitrogen rich liquid containing the respective cation. The sintering rate is influenced by volume fraction of the garnet and melilite phase which varies for different cations. Dy 2 O 3 shows the best densification behaviour which is followed by Sm 2 O 3 and Nd 2 O 3 . The fracture toughness for all are comparable while the hardness value seems to decrease with the increasing ionic size of the cations due to the lower proportions of α-SiAlON phase. The present composition favours the removal of melilite from the as cooled product as well as good densification." @default.
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- W2004381454 date "1999-04-01" @default.
- W2004381454 modified "2023-09-27" @default.
- W2004381454 title "Effect of different rare earth cations on the densification behaviour of oxygen rich α-SiAlON composition" @default.
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- W2004381454 doi "https://doi.org/10.1016/s0272-8842(98)00025-x" @default.
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