Effect of Silicon Carbide in Yttria-stabilized Zirconia for Thermal Protective Structural Materials

Modern coating technology development is essentially determined by systems, which perform extreme and adverse operating conditions. The ceramic coating technology (CCT) has found applications in space vehicles, missiles, gas turbine engines, and nuclear reactors for the thermal protective structural material. In present study, theyttria-stabilized zirconia (YSZ) and with various weight percentages of 0.1 and 0.25% silica carbide nanoparticles were synthesized by a wet chemical process. The morphological and thermal properties of the prepared hybrid ceramic coating particles were studied using scanning electron microscope (SEM) and thermogravimetric analysis (TGA). The ablation performances of the hybrid coating samples were tested using oxyacetylene flame test. The grain size and crystal structure of samples were confirmed by SEM analysis and showed that the synthesize hybrid particles are composed of agglomerated nanometer sub particles. The results of TGA showed the major weight mass loss observed around 604 °C for pure YSZ and in the range of 650 °C for hybrid coating cured composites. The linear and mass ablation rates of the prepared samples were significantly decreased by 43% and 18.4%, respectively, on adding the 0.25 wt% of SiC hybrid filler.