Accession Number : AD0610494

Title :   OXIDATION OF TANTALUM IN CARBON DIOXIDE AND CARBON MONOXIDE.

Descriptive Note : Technical rept.,

Corporate Author : WATERVLIET ARSENAL N Y

Personal Author(s) : Saegusa,Fumihiko

Report Date : SEP 1964

Pagination or Media Count : 34

Abstract : The oxidation behavior of tantalum in carbon dioxide and carbon monoxide has been investigated in the temperature range of 500 to 700C. The rate of reaction was determined by measuring a change in electrical resistance of the specimen. The phase and structure changes were examined by using x-ray diffraction and metallographic techniques. The reaction involved solution of dissociated oxygen and formation of oxides, TaOy, TaOz and Ta2O5. The initial parabolic oxidation by carbon dioxide was represented by the dissolution of oxygen and the subsequent linear oxidation was controlled by a phase boundary reaction. The parabolic oxidation by carbon monoxide was mainly associated with the dissolution of dissociated oxygen. (Author)

Descriptors :   (*TANTALUM, OXIDATION), CARBON DIOXIDE, CARBON COMPOUNDS, MONOXIDES, OXIDES, REACTION KINETICS, TANTALUM COMPOUNDS, X RAY DIFFRACTION, METALLOGRAPHY, ELECTRON MICROSCOPY, PHASE STUDIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE