کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7898308 | 1510134 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Protecting the MoSi2 healing particles for thermal barrier coatings using a sol-gel produced Al2O3 coating
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
A successful sol-gel process to encapsulate molybdenum di-silicide MoSi2 particles with a closed and thermally stable Al2O3 layer using aluminium tri-sec-butoxide as a precursor is presented. The processing conditions such as precursor selection and temperature were optimized through analysing the interaction of the MoSi2 particles with the sol. The application of the sol-gel based coating was followed by calcining the coated particles at temperatures between 900 and 1200â¯Â°C in Ar. The shell composition and the mechanical stability of the microcapsule were analysed by means of X-ray diffraction, scanning electron microscopy and thermogravimetric analysis. Upon calcining at 1200â¯Â°C in Ar, the MoSi2 core remains intact as it is, covered by an α - alumina shell with a thickness of about 0.6â¯Î¼m. The stability tests proved that the encapsulate particles are about five times more oxidation resistant than the uncoated MoSi2 particles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 7, July 2018, Pages 2728-2734
Journal: Journal of the European Ceramic Society - Volume 38, Issue 7, July 2018, Pages 2728-2734
نویسندگان
A.L. Carabat, M.J. Meijerink, J.C. Brouwer, E.M. Kelder, J.R. van Ommen, S. van der Zwaag, W.G. Sloof,