The fracture mechanics test module, along with flexture test module, allows details of toughening processes and influence of microstructure to be observed in situ using either scanning electron or optical microscopes. Employ neutron diffraction and piezospectroscopy to model effects of residual stresses associated with reinforcing, toughening phases, and coatings. The Dilor XY 800 Spectrometer with confocal line imaging and high temperature capabilities can measure stress in ceramic materials with a spatial resolution of 1 micron. New family of sinterable intermetallic alloy bonded hard metal carbides with superior high temperature capability and corrosion resistance. Zirconia-toughened ceramics that exhibit both very high toughness and strength.
Concepts provide rationale for role of internal stress and zirconia grain size.
Design models that incorporate influence of properties of phases present together with role of microstructure to allow user to develop advanced ceramics and composites. Series of scanning electron micrographs of the surface of the composite highlight continued pullout with increasing crack-opening displacement as the applied stress intensity is increased.