کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7921385 | 1511747 | 2018 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal cyclic response of [8YSZ/Al2O3]n multilayered coatings deposited onto AISI 304 stainless steel
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Thermal cyclic response of [8YSZ/Al2O3]n multilayered coatings deposited onto AISI 304 stainless steel Thermal cyclic response of [8YSZ/Al2O3]n multilayered coatings deposited onto AISI 304 stainless steel](/preview/png/7921385.png)
چکیده انگلیسی
8%Yttria-Stabilized Zirconia (8YSZ) and Alumina (Al2O3) coatings were deposited on silicon (100) and stainless steel AISI 304 substrates as single layers and [8YSZ/Al2O3]n multilayer, via a multi-target r.f. (13.56â¯MHz) magnetron sputtering system, from 8mol% Y2O3-ZrO2 and aluminum (99.95%) targets under an Ar/O2 atmosphere at 300â¯Â°C. The effect of the Al2O3/8YSZ bilayers number (nâ¯=â¯1, 10, 30, 50 and 70) on the thermal cyclic response was studied. For this test, the coatings were heated and cooled in air flux during 12â¯h by cycles of 10â¯min at 1000â¯Â°C. After this process, the oxide scale at the surface of the coatings was studied by digital image analysis, X-ray diffraction, Scanning Electron Microscopy, and Energy Dispersive X-Ray Spectroscopy. It was found a phase transformation from tetragonal to monoclinic ZrO2, deriving in a volume expansion, which caused the coatings cracks formation. Also, a reduction of superficial degradation from 80.6% (for nâ¯=â¯1 bilayer) to 0.3% (for nâ¯=â¯70 bilayers) was observed. Moreover, it was evidenced that the iron oxides formed at the uncoated substrates, decreased by the increment of bilayers number. The intensity of high-temperature oxidation of [8YSZ/Al2O3]n coatings decreased with increasing the number of bilayers, which shows that O2 ions diffusion, through defects or vacancies in the lattice structure, has been limited.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 216, 1 September 2018, Pages 526-533
Journal: Materials Chemistry and Physics - Volume 216, 1 September 2018, Pages 526-533
نویسندگان
A. Escarraga, A. Toro, Y. Aguilar, J.C. Caicedo, G. Zambrano,