Effects of surface temperature,flow velocity and ambient pressure on the oxidation of graphite at 1400–2000 °C in O2 |
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| Affiliation: | 1. Discipline of Electrical Engineering, Indian Institute of Technology Indore, Indore, M.P. 453552, India;2. Discipline of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, M.P. 453552, India;3. BC Photonics Technology Co., Richmond, B.C., Canada;4. Choitram Hospital and Research Centre, Indore, India;1. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Heilong Jiang, Harbin 150080, China;2. Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Heilong Jiang, Harbin 150080, China;3. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Heilong Jiang, Harbin 150001, China;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Shanghai 200050, China;2. University of the Chinese Academy of Sciences, Beijing 100049, China;1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;2. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China |
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| Abstract: | The effects of surface temperature (1400–2000 °C), flow velocity gradient (130–600 s?1) and ambient pressure (5–101 kPa) on the oxidation behavior of graphite were studied in O2. The weight loss rate between 1400 and 1800 °C is independent of the surface temperature but slightly decreases at 2000 °C. Besides, it displays quasi-parabolic increases with increasing the flow velocity gradient and the ambient pressure but levels off above the ambient pressure of 20 kPa. According to the theoretical analysis, the enhancement of the gas-phase CO–O2 reaction has a joint reduction effect on the weight loss rate. |
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| Keywords: | B Weight loss C Oxidation C Kinetic parameters |
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