Combustion Synthesis of Alumina-Based Multiphase Foam Ceramic

摘要

Al_2O_3-TiO-TiO_2 multiphase foam ceramic was prepared with Al powders and TiO_2 powders by combustion synthesis, Direct observation and metallographic microscope indicated that the pore diameter is 100～6000μm, and Archimedean method showed that the porosity is 35～50%. The influencing factors of the pore diameter and porosity and, the effects of adding SiO_2 on compression strength of the Al_2O_3-TiO-TiO_2 multiphase foam ceramic were discussed. It was shown that the addition of proper high temperature foaming agent can increase porosity and adding SiO_2 can decrease porosity. The Al_2O_2-TiO-TiO_2 multiphase foam ceramic has good mechanical properties and high-temperature resistance.