Combustion synthesis of α-Si3N4-(MgO, Y2O3) composites
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The possibility of obtaining composite powders of α-Si3N4-Y2O3 and α-Si3N4-MgO by self-propagating high-temperature synthesis (SHS) is studied. It is established that the α → β phase transformation starts at temperatures lower than the melting points of the corresponding eutectics. Metastable composite powders based on α-Si3N4 with a high rate of phase transition are obtained. The composite powders (α-Si3N4-Y2O3, α-Si3N4-MgO) are used in hot pressing technology.
Keywordssilicon nitride composite synthesis combustion ceramics
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