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首页> 外文期刊>NDT & E international >The concept and development of emission spectroscopy for the non-destructive evaluation (NDE) of the failure of thermal barrier coatings
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The concept and development of emission spectroscopy for the non-destructive evaluation (NDE) of the failure of thermal barrier coatings

机译：发射光谱学的概念和发展，用于热障涂层失效的非破坏性评估（NDE）

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摘要

An emission spectroscopy non-destructive evaluation (NDE) method was proposed and developed for in situ monitoring of the degradation of plasma-sprayed thermal barrier coatings (TBCs). Lithium oxide (Li_2O) was chosen as the emission spectroscopic marker material doped in the yttria-stabilized zirconia (YSZ) layer in TBC system. The lithium spectral response was examined in flame in terms of lithium oxide concentration, temperature, exposed area of the doped inner layer and distance from collection port to lithium excitation source. The possible viability of emission spectroscopy as a NDE method for the TBC failure inspection was demonstrated. The Li_2O concentration in YSZ was optimized based on the thermal cycling test for the Li_2O-doped TBCs with different structural configurations. And the durable Li_2O-doped plasma-sprayed TBC structure was generated with the optimized Li_2O concentration and make it potentially applicable in industry.
机译：提出并开发了一种发射光谱无损评估（NDE）方法，用于原位监测等离子喷涂热障涂层（TBC）的降解。选择氧化锂（Li_2O）作为掺杂在TBC体系中的氧化钇稳定的氧化锆（YSZ）层中的发射光谱标记材料。在火焰中根据氧化锂浓度，温度，掺杂内层的暴露面积以及从收集口到锂激发源的距离检查了锂光谱响应。证明了发射光谱作为NDE方法进行TBC失效检查的可行性。 YSZ中Li_2O的浓度是基于热循环试验对具有不同结构构型的掺Li_2O的TBC进行优化的。以优化的Li_2O浓度生成了持久的Li_2O掺杂等离子喷涂TBC结构，具有潜在的工业应用前景。

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