Structure of Si₃N₄–Y₂O₃–Al₂O₃ and TiN–AlN Composites Consolidated in Microwaves (2.45 GHz)

Abstract

The consolidation of nanocomposite powders of refractory nitrides (TiN, Si₃N₄, AlN) in the microwave field (2.45 GHz) is studied. The structurization in sintered samples with the length-to-height (width) ratio l/h >>5 is examined. The structure and properties of composites consolidated by microwave and conventional (resistance) heating are compared. The use of microwaves for sintering of bulk parts from Si₃N₄–Y₂O₃–Al₂O₃ and TiN–AlN nanocomposites with a great l/h ratio revealed a number of issues in producing homogenous nanoceramics.