Oxidation Experiments and Kinetics Analysis of Nuclear Graphite ET-10 by Gas Analysis and Microstructure Observation

Nuclear graphite can be used in fission and fusion systems due to its excellent nuclear performance mechanical properties where the ability of oxidation resistance is usually concerned. Although new ET-10 was revealed by previous experiments regarding accident conditions a reactor, further studies are needed oxidize under recommended ASTM D7542 standard. A test facility designed developed cylindrical specimen with 10 L/min airflow. According rates microstructures specimens, chemical kinetics-controlled regime determined as 675–750 °C, activation energy obtained 172.52 kJ/mol. The experiment results for lower longer times compared some mainstream graphite. main reasons low contents impurities binder active surface area non-impregnation baking process undertaken produce coal tar pitch coke. It should noted that evolution behavior at bottom part (facing airflow) quicker than upper specimen. We also suggest abundance oxygen supply good linearity Arrhenius plot prerequisites rather sufficient conditions.