Synthesis and Thermophysical Properties of Gd₂Zr₂O₇/SrZrO₃ Composite as a Thermal Barrier Coating Material

This study evaluates a method for producing Gd₂Zr₂O₇/SrZrO₃, a ceramic-matrix composite considered for use as a thermal barrier coating. GdZrO/SrZrO powders are synthesized by co-precipitation, then cold pressed and sintered to form the bulk composite material. Phase stability of the powder and bulk material is assessed by X-ray diffraction and several bulk material properties are determined, including microhardness, Young’s modulus, fracture toughness, thermal expansion coefficient, heat capacity, thermal diffusivity, and thermal conductivity. The results are presented and discussed.