Functional requirements like higher strength, resistance, and shielding from chemical reactions, degradation, etc., of the base metal are achieved by modifying their exposed surfaces using TBC (thermal barrier coating). Modified outer surface of components in the GT (gas turbine) improves the performance by the increase of inlet temperature, enhancing longer life and providing many interrelated surfaces to withstand severe working conditions. This work is based on characteristic (mechanical, thermal, and tribology) evaluation of TBC-coated GT components made of Inconel 718 manufactured from traditional and 3-D printing-based selective laser melting (SLM) process and compared. TBCs comprising bond coat and top ceramic oxide coat were deposited by High-Velocity Oxy-Fuel and Atmospheric Plasma Spraying techniques, respectively. Characteristics evaluated by varying coating thickness, standoff distance, substrate preheating, Input torch power, etc., revealed that characteristics of substrates manufactured from SLM methods improved significantly except porosity and average surface roughness. These improvements are essential for embedding sensors, thin films, etc., in TBCs for continuous monitoring of outputs.

中文翻译：

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由基于 3D 打印的选择性激光熔化处理 Inconel 718 合金制成的热喷涂涂层 GT 组件的表征

通过使用 TBC（热障涂层）对其暴露表面进行改性，可实现基体金属的更高强度、抵抗力和屏蔽化学反应、降解等功能要求。GT（燃气轮机）中部件的改性外表面通过增加入口温度来提高性能，延长使用寿命并提供许多相关表面以承受恶劣的工作条件。这项工作基于对采用传统工艺和基于 3D 打印的选择性激光熔化 (SLM) 工艺制造的 Inconel 718 制成的 TBC 涂层 GT 组件的特性（机械、热和摩擦学）评估并进行比较。分别通过高速氧燃料和大气等离子喷涂技术沉积包含粘合涂层和顶部陶瓷氧化物涂层的 TBC。通过改变涂层厚度、间隔距离、基材预热、输入炬功率等评估的特性表明，除了孔隙率和平均表面粗糙度外，由 SLM 方法制造的基材的特性得到显着改善。这些改进对于在 TBC 中嵌入传感器、薄膜等以连续监测输出至关重要。