Investigation of Gd 2 (Hf 0.7 Ti 0.3 ) 2 O 7 ceramics as a potential thermal barrier coating
Source abstract
Abstract
Abstract In this study, Gd₂(Hf₀.₇Ti₀.₃)₂O₇ ceramics were synthesized by a high‐temperature solid‐state method, and the feasibility of using it as thermal barrier coating was systematically studied. This study primarily investigated the thermal physical properties, mechanical properties, and calcium–magnesium–alumina–silicate oxides (CMAS) corrosion resistance of the Gd₂(Hf₀.₇Ti₀.₃)₂O₇ ceramic bulk. The results indicated that the thermal expansion coefficient of Gd₂(Hf₀.₇Ti₀.₃)₂O₇ ceramics was close to that of 6∼8wt% yttria‐stabilized zirconia (YSZ). At 1000°C, the thermal conductivity of Gd₂(Hf₀.₇Ti₀.₃)₂O₇ (1.43 W/(m·K)) was about 43% lower than that of YSZ (2.5 W/(m·K)). Furthermore, Gd₂(Hf₀.₇Ti₀.₃)₂O₇ also exhibited significant advantages in mechanical properties. Its hardness, fracture toughness, and Young's modulus are 10.00 ± 0.28 GPa, 2.53 ± 0.06 MPa·m¹/ 2 , and 124.91 ± 17 GPa, respectively. In addition, Gd₂(Hf₀.₇Ti₀.₃)₂O₇ exhibited excellent CMAS corrosion resistance, making it a promising candidate for the next generation of thermal barrier coating materials.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · High-Temperature Coating Behaviors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Henan Key Laboratory of Utilization of Non‐metallic Mineral in the South of Henan Xinyang Normal University Xinyang China
College of Chemistry and Material Science Hengyang Normal University Hengyang China
Institute of Development and Application of Shangtianti Nonmetallic Mining Technology Xinyang China
Jiangxi Key Laboratory of Surface Engineering Jiangxi Science and Technology Normal University Nanchang China
Funding
National Natural Science Foundation of China · Nanhu Scholars Program for Young Scholars of Xinyang Normal University
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