Kinetics of graphitization in glassy carbon

✍ Scribed by Ram R. Saxena; Robert H. Bragg

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 365 KB
• Volume: 16
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(78)90077-5

✦ Synopsis

The kinetics of graphitization has been studied using structure parameters dmz, L, and L. derived from wide angle X-ray diffraction measurements. For Glassy Carbon (GX) isochronally (2 hr each) heat treated in the temperature range lOOO-2800°C. the behavior of these parameters can be studied in three separate regions: (1) For heat treatment temperature (HTT) < 1500°C GC undergoes dehydrogenation, (2) For 1500" < HTT < 2300°C the main process is stress relief, (3) For HTT > 2300°C graphitization takes place. The activation energy for graphitization in the third region has been determined to be 215 ? kcahmole using the "superposition technique".