کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5438376 | 1398183 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hot corrosion behavior of (Gd0.9Sc0.1)2Zr2O7 in V2O5 molten salt at 700-1000 °C
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Hot corrosion behavior of (Gd0.9Sc0.1)2Zr2O7 ceramic exposed to V2O5 molten salt at 700-1000 °C was investigated, providing better understanding of its corrosion resistance as a promising thermal barrier coating. Obvious corrosion reaction occurred between (Gd0.9Sc0.1)2Zr2O7 and V2O5 molten salt after 4 h heat treatment, corrosion products being temperature dependent. At 700 °C, large amount of Sc2O3 doped ZrV2O7 and GdVO4, together with a minor amount of Sc2O3-stabilized tetragonal ZrO2 (t-ZrO2), formed on the sample surfaces. With the increase of the test temperature, Sc2O3 doped ZrV2O7 turned to decompose, leading to the formation of more t-ZrO2. At 900 °C and 1000 °C, the corrosion products were composed of GdVO4 and t-ZrO2. The mechanism by which the corrosion reaction occurs is proposed based on phase diagrams and Lewis acid-base rule.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 12, 15 August 2017, Pages 9041-9046
Journal: Ceramics International - Volume 43, Issue 12, 15 August 2017, Pages 9041-9046
نویسندگان
Chenglong Zhang, Mingzhu Li, Yuchen Zhang, Lei Guo, Junxiu Dong, Fuxing Ye, Linwei Li, Vincent Ji,