کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1476179 | 991144 | 2012 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Characterization of microstructure and thermal properties of Gd2Zr2O7-type thermal barrier coating Characterization of microstructure and thermal properties of Gd2Zr2O7-type thermal barrier coating](/preview/png/1476179.png)
We present herein a characterization of the microstructure and thermal properties of thermal barrier coatings (TBCs), which we obtained via plasma spraying of powder Gd2Zr2O7. By using X-ray diffraction (XRD) and electron backscatter diffraction (EBSD), we evaluated the phase composition of a ceramic layer and estimated the ceramic-layer stress state by the sin2ψ method. The tests revealed that the TBC layer consisted of a single-phase structure of Gd2Zr2O7, namely, an Fd3m lattice. The thermal diffusivity of the outer ceramic layer was determined based on a bilayer model and corrected with a factor to account for the presence of pores. The results reveal that the use of the standard parameters in a standard spraying process gives good-quality Gd2Zr2O7 TBCs with a thermal conductivity considerably lower than 8YSZ-type TBCs.
Journal: Journal of the European Ceramic Society - Volume 32, Issue 9, July 2012, Pages 2025–2034