scholarly journals Effect of the Raw Material and Coating Process Conditions on the Densification of 8 wt% Y2O3-ZrO2 Thermal Barrier Coating by Atmospheric Plasma Spray

2016 ◽  
Vol 53 (6) ◽  
pp. 628-634 ◽  
Author(s):  
Yoon-Suk Oh ◽  
Seong-Won Kim ◽  
Sung-Min Lee ◽  
Hyung-Tae Kim ◽  
Min-Sik Kim ◽  
...  
Keyword(s):  
Thermal Barrier Coating ◽  
Plasma Spray ◽  
Atmospheric Plasma Spray ◽  
Raw Material ◽  
Atmospheric Plasma ◽  
Process Conditions ◽  
Thermal Barrier ◽  
Coating Process ◽  
Barrier Coating

Hot-Corrosion Behavior of Modified YSZ Thermal Barrier Coating

2014 ◽  
Vol 492 ◽  
pp. 361-364
Author(s):  
Yi Wang ◽  
Li Jia Chen ◽  
Hong Li Suo ◽  
Yi Chen Meng
Keyword(s):  
Thermal Barrier Coating ◽  
Substrate Surface ◽  
Atmospheric Plasma ◽  
Thermal Barrier ◽  
X Ray Diffraction ◽  
X Ray ◽  
Abnormal Growth ◽  
Barrier Coating ◽  
Thermal Cycling Testing ◽  
Ysz Coating

A modified YSZ thermal barrier coating (TBC) was prepared by simultaneously depositing two components, NiCrAlY and YSZ, on nicked-based superalloy DZ125 via atmospheric plasma spraying. In this study, the sodium salt was deposited on substrate surface at the deposition rate of 3 mg/cm-2. After being heated at 950 °C for 50min, the specimens were cooled to ambient temperature within 10 min. The specimens were recoated after each 10 cycles. Subsequently, the corrosion products were analyzed via X-Ray diffraction and SEM. The results indicated that deterioration of traditional YSZ coating mainly resulted from the fluxing of thermal grown oxides (TGO). Conversely, abnormal growth of TGO and enrichment of molten salt around segmentation crack were not observed in the modified YSZ thermal barrier coating. Moreover, the modified YSZ-TBC exhibited higher thermal resistance than traditional YSZ-TBC in the thermal cycling testing.

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