INTERFACIAL EQUILIBRIA IN TITANIUM PARTICLE GLASS-CERAMIC COMPOSITES

Titanium particle-reinforced glass ceramic matrix composites were prep ared by sintering under an Ar atmosphere titanium particles (Ti(p)) an d the glass powders 45ZnO-15PbO-40B2O3 (MOI%) (ZPB) for the ZPBT compo sites and 48.8SiO2-48.8CaO-2.4B2O3 (SCB) for the SCBT composites. Each composite was characterized by scanning electron microscopy, energy d ispersive spectroscopy, X-ray diffraction and differential thermal ana lysis. In order to modify the interfacial strength of the composites, glass matrices with different amounts of TiO2 (TZPB and TSCB, 7 and 2. 1 mol% TiO2, respectively) were prepared. TiO2 allows the formation of a continuous interface between Ti(p) and the TSCB matrix and the modi fication of the interfacial equilibrium between Ti(p) and the TZPB mat rix.