کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8026651 | 1517609 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of melting state on the thermal shock resistance and thermal conductivity of APS ZrO2-7.5Â wt.% Y2O3 coatings
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
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چکیده انگلیسی
The microstructures of two types of ZrO2-7.5 wt.% Y2O3 (YSZ) coatings fabricated by air plasma spraying (APS) but containing different amounts of columnar grains were investigated through scanning electron microscopy and electron backscatter diffraction analysis. Differences in the formation mechanisms of columnar and equiaxed grains were characterized using particles collected in a water container, from which it was found that these mechanisms are closely related to the melted state of the in-flight particles. Furthermore, it was found that the higher the columnar grain concentration of an as-sprayed coating, the higher its thermal shock resistance. This means that it is possible to improve the thermal shock resistance of APS YSZ coatings simply by introducing more columnar grains, as this increases their thermal conductivity. Using this knowledge, YSZ coatings with good thermal shock resistance and a thermal conductivity of 0.81 W·(m·K)â 1 at 1100 °C were successfully prepared.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 270, 25 May 2015, Pages 132-138
Journal: Surface and Coatings Technology - Volume 270, 25 May 2015, Pages 132-138
نویسندگان
Xuemei Song, Ziwei Liu, Tomi Suhonen, Tommi Varis, Liping Huang, Xuebin Zheng, Yi Zeng,