CENTRO DE TECNOLOGIA DE RECURSOS MINERALES Y CERAMICA
Unidad Ejecutora - UE
Densification and mechanical properties of ZrO2?CaAl4O7 composites obtained by reaction sintering
YESICA BRUNI; ESTEBAN AGLIETTI; FERNANDO BOOTH; LILIANA GARRIDO
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
CARL HANSER VERLAG
Lugar: Berlin, Germany; Año: 2016 vol. 107 p. 1 - 9
Composites of the ZrO2?CaO?Al2O3 system exhibit highcorrosion resistance and high chemical stability, enablingsuitable properties for enhanced performance as refractories.In this work composites based on ZrO2?CaAl4O7(CA2) were developed by reaction sintering of two pureZrO2 powders with different particle size (d50 = 0.44 lmand d50 = 8 lm) mixed with high?alumina cement. The effectsof CaO to ZrO2 molar ratio, particle size of ZrO2 andsintering temperature on densification, c-ZrO2 formation,microstructure and mechanical properties (Vickers hardness,dynamic Young?s modulus and compressive strength)were determined. Porosity and mean pore size of compositesreduced with decreasing both particle size of ZrO2and CaO content. The highest compression strength of*350 MPa and hardness of 6 GPa corresponded to denseZrO2-based composite with 15 vol.% CA2 sintered at1 400 8C.