The oxidation resistance of the bond coat in thermal barrier coating systems has significant influence on thermal cycling performance of the protective coating. In this study, the influence of varying the alumina content of plasma-sprayed oxide dispersion strengthened bond coats with CoNiCrAlY matrix material on the oxidation resistance was analysed by thermogravimetric analysis, SEM and TEM. Yttrium ions at the alumina scale grain boundaries and the grain size in the scale appear as major factors influencing oxidation properties. The ODS material with 2, 10 and 30 wt% alumina content was applied in TBC systems as an additional thin bond coat. The thermal cycling performance of those advanced TBC systems, in burner rig tests, was evaluated with respect to the ODS material properties. Thermal cycling behaviour is in good correlation with the isothermal oxidation resistance. All results indicate that TBC systems with 10 wt% alumina content in the ODS bond coat have a superior thermal cycling performance, as compared to ODS bond coats with lower or higher alumina content.

中文翻译：

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具有更高氧化铝含量的氧化物弥散强化粘合涂层：抗氧化性和对热障涂层寿命的影响

热障涂层系统中粘合涂层的抗氧化性对保护涂层的热循环性能有显着影响。在本研究中，通过热重分析、SEM 和 TEM 分析了 CoNiCrAlY 基体材料等离子喷涂氧化物弥散强化粘合涂层的氧化铝含量变化对抗氧化性的影响。氧化铝鳞片晶界处的钇离子和鳞片中的晶粒尺寸是影响氧化性能的主要因素。氧化铝含量为 2、10 和 30%（重量）的 ODS 材料作为额外的薄粘合涂层应用于 TBC 系统。在燃烧器试验中，这些先进的 TBC 系统的热循环性能是根据 ODS 材料特性进行评估的。热循环行为与等温抗氧化性有很好的相关性。所有结果表明，与氧化铝含量较低或较高的 ODS 粘合涂层相比，ODS 粘合涂层中氧化铝含量为 10%（重量）的 TBC 系统具有优异的热循环性能。