A new polyphase silicon nitride alloy has been developed using Sc 2 O 3 as a densification aid. Subsolidus phase relations in the system Si‐Sc‐O‐N are reported together with preliminary oxidation and compressive creep results of a representative composition in the Si 3 N 4 ‐Si 2 N 2 O‐Sc 2 Si 2 O 7 phase field. Microstructural observations of the material are also presented.
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Morgan et al. (1981) studied this question.
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