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
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Protecting the MoSi2 healing particles for thermal barrier coatings using a sol-gel produced Al2O3 coating
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 1200 °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 1200 °C in Ar, the MoSi2 core remains intact as it is, covered by an α - alumina shell with a thickness of about 0.6 μm. 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
نویسندگان
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