Abstract
A new ceramic composite (Zr0.92Y0.08)O1.96 dispersed in LaTi2Al9O19 as a thermal barrier material was synthesized by the hybrid sol–gel method. The composite ceramic has good thermochemical stability up to 1500°C. The thermal conductivity of composite ceramic is circa. 1.0W/m·K at ambient temperature and the coefficients of thermal expansion are very stable and comparable to (Zr0.92Y0.08)O1.96 about 10.7×10−6K−1 at 1223K. The sintering resistance and mechanical properties become better after being dispersed. Therefore, the new ceramic composite synthesized by hybrid sol–gel method can be a promising candidate as a thermal barrier material on Ni-based superalloy.
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