Preparation and characterization of a glass matrix composite containing aluminium titanate particles with improved thermal shock resistance

摘要

Improving the thermal shock resistance of sintered glasses in an important task to broaden their technical and structural applications. In this study, the incorporation of second phase particles with low Young's modulus (E) into glass matrices to form composite materials is shown to be a convenient approach to increase their thermal shock resistance. Novel aluminosilicate glass matrix composites containing aluminium titanate (Al_2TiO_5) particles were fabricated by powder technology and pressureless sintering. By incorporating up to 30 vol.% of aluminium titanate particles a nearly fourfold increase of the thermal shock resistance was achieved. This was determined by measuring the critical temperature difference necessary to cause superficial cracks in cylindrical samples subjected to water-quench tests. The experimental results are shown to confirm qualitatively the theoretical prediction of the model of Hasselman et al. for the thermal shock resistance of low-E composites.