کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5468459 | 1518936 | 2016 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Advanced analysis on growth mechanisms of thermally grown oxide at elevated temperature for thermal barrier coatings
ترجمه فارسی عنوان
تجزیه و تحلیل پیشرفته در مکانیسم های رشد اکسید گرما رشد شده در دمای بالا برای پوشش های حرارتی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
چکیده انگلیسی
Yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBCs) were prepared by plasma spraying. The as prepared YSZ TBCs were characterized by scanning electron microscopy (SEM), Electron backscatter diffraction (EBSD) and focused ion beam (FIB) systems before and after heat treatment. A thermally grown oxide (TGO) layer was formed between YSZ topcoat and bond coat after heat treatment. EBSD results revealed that the TGO layer was composed of α-Al2O3 and cubic Al2NiO4 layers. Mechanism controlling the growth of the TGO layer were analyzed in detail. It was found that the AlNi phase gradually disappeared from bond coat during heat treatment, which provided Al and Ni sources for the formation of TGO. Meanwhile, EBSD results confirmed that the growth of the TGO layer was dominated by the diffusion of Al and Ni rather than O penetration. Furthermore, direct evidence on the diffusion pathways of Al and Ni was also found, indicating that Al and Ni proceeded along the pores, cracks and YSZ grain boundaries to promote the further growth of TGO layer with increased heat treatment time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 134, December 2016, Pages 33-39
Journal: Vacuum - Volume 134, December 2016, Pages 33-39
نویسندگان
Xuemei Song, Fangli Meng, Mingguang Kong, Ziwei Liu, Yongzhe Wang, Liping Huang, Xuebin Zheng, Yi Zeng,