An Overview of Novel Tetragonal Oxides with Enhanced High-Temperature Capabilities for Structural Applications

Abstract Tetragonal oxides possess great potential in structural applications because of the superior thermomechanical properties and corrosion resistance. This paper presents an overview of the structure and thermal properties of (Dy, Ce, Y)-doped ZrO2. The tetragonal structure is enhanced by doping Ce4+ cations to YSZ, whereas doping Dy3+ stabilizes the cubic phase. In comparison to conventional 8 wt.% Y2O3 stabilized ZrO2 (equivalent to 4 mol% Y2O3 stabilized ZrO2, 4YSZ), the thermal conductivity of 3Dy5Ce-YSZ and 2Dy-YSZ is decreased and the coefficient of thermal expansion (CTE) is increased, which are desirable for thermal barrier materials. The potential of Dy and Ce doped 4YSZ as thermal barrier materials for high-temperature applications has been highlighted in the paper.

Keywords thermal barrier coating materials, tetragonal structure, thermal conductivity, coefficient of thermal expansion

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Dynamic analyses of a flat plate and a beam subjected to a moving load

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