کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7886011 1509785 2018 23 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of Y2O3 on the oxidation properties of ZrSi2/SiC coating prepared by SAPS on the carbon-carbon composites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Effect of Y2O3 on the oxidation properties of ZrSi2/SiC coating prepared by SAPS on the carbon-carbon composites
چکیده انگلیسی
In order to improve the oxidation resistance of carbon-carbon (C/C) composites at high temperature, different content of Y2O3 modified ZrSi2/SiC coating for C/C composites were prepared by pack cementation and supersonic atmosphere plasma spraying (SAPS). Microstructure observation and phase identification of the coatings were analyzed by SEM, XRD, DSC/TG and EDS. Experimental results shown that the coating with 10 wt% Y2O3 effectively protected C/C composites from oxidation at 1500 °C in air for 301 h with a mass loss of 0.13% and experienced 18 thermal shock times from room temperature (RT) to 1500 °C. First, Y2O3 could restrain the phase transition of ZrO2 to reduce the formation of thermal stresses of the coating; second, the random distribution of ZrO2 ceramic particles and the formation of ZrSiO4 enhanced the stability of the SiO2; third, the formation of Y2Si2O7 and Y2SiO5 could relieve the thermal mismatch between ZrSi2-Y2O3 outer layer and the inner layer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 13, September 2018, Pages 15065-15071
نویسندگان
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