ceramic, synthesis, microstructure, property, damage tolerance
Single-phase Y4Al2O9 (YAM) powders were synthesized via solid-state reaction starting from nano-sized Al2O3 and Y2O3. Fully dense (99.5%) bulk YAM ceramics were consolidated by spark plasma sintering (SPS) at 1800 ℃. We demonstrated the excellent damage tolerance and good machinability of YAM ceramics. Such properties are attributed to the easy slipping along the weakly bonded crystallographic planes, resulting in multiple energy dissipation mechanisms such as transgranular fracture, shear slipping and localized grain crushing.
Tsinghua University Press
Qian WANG, Salvatore GRASSO, Chunfeng HU et al. Spark plasma sintering of damage tolerant and machinable YAM ceramics. Journal of Advanced Ceramics 2013, 2(2): 193-200.