کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5354018 1503699 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nano-SiC/SiC anti-oxidant coating on the surface of graphite
ترجمه فارسی عنوان
پوشش نانو سی / سی ضد اکسیدان روی سطح گرافیت
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی

In this research, a dual-layer coating has been used to improve high temperature oxidation resistance of graphite substrate. For first layer, silicon carbide was applied by pack cementation method. Powder pack consisted of Si, SiC and Al2O3 and heat-treated at 1650 °C in an argon atmosphere. SEM and XRD characterizations confirmed formation of SiC diffusion coating with about 500 μm including compositionally gradient of C and Si elements. Electrophoretic deposition (EPD) was used to deposit nano SiC (SiCn) particles as second layer. Thickness of second layer of SiCn in corresponded optimal situation was 50 μm. Samples with single and dual layers were investigated in oxidation test at 1600 °C. Results showed that an extreme increase was occurred in oxidation resistance after application of second layer of nano SiC. Weight loss value for single layer coating of SiC and dual layer coating of SiCn/SiC after oxidation test for 28 h at 1600 °C were 29 wt.% and 2.4 wt.%, respectively.

► Formation of a dual-layer coating on the graphite. ► Developing graded SiC and nano SiC layers using pack cementation and electrophoretic deposition methods, respectively. ► Improvement of high temperature oxidation behavior of substrate. ► Weight loss of 29% and 2.4% for single layer coating of SiC and dual layer coating of SiCn/SiC, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 264, 1 January 2013, Pages 128-132
نویسندگان
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