Evaluation of Two New Thermal Barrier Coating Materials Produced by APS and EB‐PVD
Evaluation of Two New Thermal Barrier Coating Materials Produced by APS and EB‐PVD
复制标题
APS 和 EB-PVD 生产的两种新型热障涂层材料的评价
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
R. Wing
中科院分区：
文献类型：
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作者：
B. Saruhan;U. Schulz;P. Bengtsson;R. Knoedler;P. Moretto;F. Taricco;R. Vaßen;G. Pracht;C. Friedrich;O. Lavigne;C. Siry;N. Coignard;R. Wing
Due to the limited temperature capability of current topcoat material (8YSZ) of thermal barrier coating (TBC) in gas turbines, world-wide research has been undertaken to identify new candidates for TBC applications above 1200°C. Within the 5 t h Framework Brite/Euram-research project G4RD-CT-2001-00504, new materials having different composition and crystal structure than those of conventional 8YSZ-TBC have been produced by atmospheric plasma-spraying (APS) and electron-beam physical vapour deposition (EB-PVD) techniques and investigated intensively. The results obtained from two of those new materials are compared with those of the conventional PYSZ coating. Investigations primarily involved the production of powders suitable for plasma-spraying as well as ingots for EB-PVD process. The next step was the optimization of the coating process for both techniques. Coatings were characterized by XRD and microstructural investigation, by determination of different physical properties such as thermal expansion coefficient, specific heat capacity, thermal diffusivity, density and thermal conductivity before and after ageing. These results enabled the evaluation of the potential of these two new materials for an application as thermal barrier coating.
