Investigation of Isothermal Oxidation Behavior of Thermal Barrier Coatings (TBCs) Consisting of YSZ and Multilayered YSZ/Gd2Zr2O7 Ceramic Layers
Investigation of Isothermal Oxidation Behavior of Thermal Barrier Coatings (TBCs) Consisting of YSZ and Multilayered YSZ/Gd2Zr2O7 Ceramic Layers
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DOI：
10.1007/s11085-016-9690-4
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发表时间：
2017-01
影响因子：
2.2
通讯作者：
Kadir Mert Doleker;H. Ahlatçı;A. Karaoglanli
中科院分区：
文献类型：
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作者：
Kadir Mert Doleker;H. Ahlatçı;A. Karaoglanli
稀土锆酸盐由于其优异的高温性能，作为tbc的面漆材料具有很大的潜力。tbc通常通过热喷涂方法或电子束物理气相沉积（EB-PVD）技术生产。与其他热喷涂工艺相比，冷气体动态喷涂（CGDS）是一种很有前途的致密无氧化结合涂层沉积方法，而EB-PVD工艺对tbc顶层涂层具有良好的附着力和应变耐受性。为了观察gd2zr2o7对tbc氧化行为的影响，本研究采用CGDS法在衬底材料上喷涂CoNiCrAlY，然后采用EB-PVD技术沉积钇稳定氧化锆（YSZ）和YSZ/ gd2zr2o7。沉积后，在1100℃的高温炉中等温氧化8、24、50和100 h，观察氧化后样品的显微组织，对比评价tbc的热生长氧化层。
Rare-earth zirconates have a big potential as top coat material of TBCs due to their superior high-temperature properties. TBCs are usually produced by thermal spray methods or electron beam physical vapor deposition (EB-PVD) techniques. Cold gas dynamic spray (CGDS) is a promising deposition method for production of dense and non-oxide bond coat compared to other thermal spray processes, while EB-PVD process provides good adhesion and strain tolerance for top coating layers of TBCs. In this study, in order to observe the effect of Gd2Zr2O7on the oxidation behavior of TBCs, CoNiCrAlY was sprayed on substrate material using the CGDS method, afterward, yttria-stabilized zirconia (YSZ) and YSZ/Gd2Zr2O7were deposited using EB-PVD technique. After deposition, specimens were isothermally oxidized in a high-temperature furnace at 1100 °C for 8, 24, 50, and 100 h. Microstructures of oxidized samples were examined and thermally grown oxide layer of TBCs were comparatively evaluated.