Development of Coating Design System for Gas Turbine, V. Basic Study of Sintering Behavior of Zirconia Thermal Barrier Coating.
Development of Coating Design System for Gas Turbine, V. Basic Study of Sintering Behavior of Zirconia Thermal Barrier Coating.
复制标题
燃气轮机涂层设计系统的开发，五、氧化锆热障涂层烧结行为的基础研究。
DOI：
10.2472/jsms.47.672
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
K. Nagata
中科院分区：
文献类型：
--
作者：
Y. Itoh;Masashi Takahashi;Takanari Okamura;K. Nagata
热障涂层已应用于燃气轮机的热区部件，如水桶、燃烧室等。随着冷却技术的发展，燃气轮机的换热系数被认为是不可或缺的。现在人们希望使热障涂层具有更高的耐久性，以便能够承受更高的燃烧温度。本研究旨在明确常压等离子喷涂氧化锆涂层的高温烧结行为。实验结果表明，等离子喷涂氧化锆涂层在1300K以上收缩明显。随着加热温度的升高和加热时间的延长，收缩有增大的趋势。线性收缩服从2/5次时间规律。确定了烧结速率常数的Arrhenius型温度依赖关系。最后，通过模拟分析，明确了烧结过程中的收缩应力行为。
Thermal barrier coating (TBC) had been already applied to the hot section parts of gas turbines, such as a bucket and a combustor. It is thought that TBCs are in dispensable for the gas turbines along with cooling technology. It is now desired to give higher durability to TBCs so as to endure higher combustion temperature. The object of this study is to clearify the sintering behavior of Atmospheric Plasma Spraying zirconia TBC at high-temperature.The experimental results showed that the shrinkage of plasma sprayed zirconia coating became remarkable above 1300K. There was a tendency that the shrinkage increased with increasing heating temperature and heating time. It was also indicated that the linear shrinkage followed a 2/5 power time law. The Arrhenius type temperature dependence for the sintering rate constant was confirmed. Finally, the shrinkage stress behavior induced by the sintering was made clear by the simulation analysis.