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首页> 外文期刊>Journal of the European Ceramic Society >Comparison of hot corrosion behaviors of plasma-sprayed nanostructured and conventional YSZ thermal barrier coatings exposure to molten vanadium pentoxide and sodium sulfate
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Comparison of hot corrosion behaviors of plasma-sprayed nanostructured and conventional YSZ thermal barrier coatings exposure to molten vanadium pentoxide and sodium sulfate

机译：等离子喷涂纳米结构和常规YSZ热障涂层在熔融五氧化二钒和硫酸钠中的热腐蚀行为比较

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摘要

The purpose of the current study was evaluation and comparison of hot corrosion behaviors of plasma-sprayed conventional and nanostructured yttria stabilized zirconia (YSZ) thermal barrier coatings (TBCs). Hot corrosion studies were performed on the surface of coatings in the presence of a molten mixture of V_2O_5+Na_2SO_4 at 1000 °C for 30 h. Results indicated that the hot corrosion mechanisms of conventional and nanostructured YSZ coatings were similar. The reaction between corrosive salt and Y_2O_3 produced YVO_4, leaching Y_2O_3 from YSZ and causing the detrimental phase transformation of zirconia from tetragonal to monoclinic. The nanostructured coaling, as compared to its conventional counterpart, in spite of a further reaction with the corrosive salt, showed a higher degradation resistance during the hot corrosion test due to increased compliance capabilities resulting from the presence of an extra source of porosity associated with the nano-zones.
机译：本研究的目的是评估和比较等离子体喷涂的常规和纳米结构的氧化钇稳定的氧化锆（YSZ）热障涂层（TBC）的热腐蚀行为。在1000°C的V_2O_5 + Na_2SO_4熔融混合物存在下，对涂层表面进行了热腐蚀研究，时间为30 h。结果表明，常规的和纳米结构的YSZ涂层的热腐蚀机理是相似的。腐蚀性盐与Y_2O_3之间的反应生成YVO_4，从YSZ浸出Y_2O_3，并导致氧化锆从四方晶向单斜晶的有害相变。尽管与腐蚀性盐进一步反应，但与传统盐相比，纳米结构的结碳在热腐蚀试验中仍显示出较高的抗降解性，这是由于存在额外的孔隙源而导致的顺应性增强。纳米区。

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