Thermophysical Properties of Y_2O_3 and Gd_2O_3 Co-doped SrZrO_3 Thermal Barrier Coating Material
Source abstract
Abstract
Y2O3(5mol%) and Gd2O3(5mol%) co-doped SrZrO3(Sr(Zr0.9Y0.05Gd0.05)O2.95,SZYG) was synthesized by solid state reaction method.The phase stability of the SZYG powder synthesized at high temperature of 1450℃ for a long period and at temperature range of 200 1400℃ was characterized by XRD and DSC,respectively.The coefficients of thermal expansion(CTEs) of bulk SZYG recorded by a high-temperature dilatometer show that the phase transitions of SrZrO3 is suppressed remarkably by co-doping Y2O3 and Gd2O3.The thermal conductivity of bulk SZYG at 1000℃ is 1.36 W/(m.K),which is 35% lower than that of bulk SrZrO3 and 8YSZ.The good chemical compatibility of SZYG with 8YSZ and Al2O3,is detected after heat-treatment at 1250℃ for 24 h.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Radiative Heat Transfer Studies · Thermal properties of materials · Thermal Expansion and Ionic Conductivity
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