72. The effect of gaseous additives on the oxidation of carbon by photolysed carbon dioxide

✍ Scribed by F.S. Feates; R.S. Sach

• Publisher: Elsevier Science
• Year: 1965
• Tongue: English
• Weight: 110 KB
• Volume: 3
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(65)90138-7

✦ Synopsis

Graphite samples have been exposed to carbon dioxide irradiated with ionizing and non-ionizing radiation. Observations made in an electron microscope of selected areas of graphite before and after exposure to oxidizing species show, at one end of the scale, complete resistance to attack and, at the other, complete oxidation. The extent of attack and rate of attack have been found to depend on several factors, the most important being, gas composition, temperature, dose, and the defect structure and impurity content of the graphite. Attack is limited to well defined regions of the graphite. The results show that the oxidation produces non-gaseous products which are deposited on the graphite surface and there is evidence that this deposition frequently occurs at defects and impurity atoms in the graphite.