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This paper addresses an evaluation of the effects of variation in the CaCO3-Al2O3 ratio on the physical properties of in situ calcium hexaluminate (CaAl12O19 or CA6) porous structures during sintering. Combinations of calcined alumina (α-Al2O3) and different amounts of precipitated CaCO3 particles were thermally treated between 500°C and 1500°C. Their physical properties (Total Porosity, Flexural...
Among the available routes to enhance the mechanical behavior and toughening degree of ceramics, in situ formation of acicular or platelet grains in the resulting microstructure has gained special attention. Various studies focused on investigating the self-reinforced role of these elongated phases (acting as bridging sites in the wake of a crack), as well as the use of very reactive raw materials...
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