چکیده مقاله
Graphite is used in a diverse number of applications from pencils to lubricants and batteries to other more extreme applications, such as nuclear fusion and steel manufacturing, Due to its high temperatures withstanding, graphite is a common refractory material However, for high temperature application like steelmaking graphite undergo oxidation in reacting with oxygen This causes some economic, environmental and manufacturing issues To overcome this problem a protective coating based on colloidal silica is proposed in this work Two series of graphite pieces were prepared with and without the protective coating The samples were transferred into a tube furnace and heated to 1000 C for 1, 2, 3 and 4 hours The burn off of the samples was considered as oxidation rate Results demonstrated that under high temperature, graphite samples coated with as prepared coating showed high resistance to oxidation in comparison to the samples without the coating Beside the protective coating reduces the contact between graphite surface and oxygen the SiO2 nanoparticles could penetrate into the graphite surface pores and locally reaction between SiO2 and carbon led to creation of a thin protective layer of SiC
کلیدواژهها
نویسندگان
Sousan Rasouli
Associate professor in Institute for Color Science and Technology N۰ ۵۵, Hossein Abad Sq Vafamanesh St Tehran Iran
شیوه ارجاع
Rasouli, Sousan,1400,Preparation of nanoparticles-based coating for protection of graphite from oxidation,18th National Conference and 7th International Conference on Manufacturing Engineering in Iran
ارائهشده در
مجموعه مقالات هجدهمین همایش ملی و هفتمین کنفرانس بین المللی مهندسی ساخت و تولید ایران11 اسفند 1400 · تهران