Effect of CMAS Infiltration on Radiative Transport Through an EB‐PVD Thermal Barrier Coating
Effect of CMAS Infiltration on Radiative Transport Through an EB‐PVD Thermal Barrier Coating
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DOI：
10.1111/j.1744-7402.2008.02225.x
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发表时间：
2008-05
影响因子：
2.1
通讯作者：
Li Li-Li;D. Clarke
中科院分区：
文献类型：
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作者：
Li Li-Li;D. Clarke
燃气涡轮机中的砂摄入的不利影响之一是叶片和导叶上的热障涂层可在高温下被熔融的钙镁铝硅酸盐（CMAS）渗透并导致涂层的过早失效。为了研究CMAS渗透的影响，报道了代表CMAS的合成玻璃在500 nm至2.5 μm范围内的光学性质。结果表明，硅酸盐渗透的电子束沉积TBC可以增加通过涂层的辐射传输。结果是定性一致的一个简单的光学散射模型通过多孔涂层的辐射传输。
One of the adverse effects of sand ingestion in gas turbines is that the thermal barrier coatings on the blades and vanes can be infiltrated at high temperatures by molten calcium–magnesium–aluminum–silicate (CMAS) and cause premature failure of the coating. To investigate the effect of CMAS penetration, the optical properties of a synthetic glass representative of CMAS are reported from 500 nm to 2.5 μm. Results are then presented to show that silicate infiltration of an electron beam-deposited TBC can increase radiative transport through the coating. The results are qualitatively consistent with a simple optical scattering model for radiative transport through a porous coating.