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Browsing by Author "Grieveson, P."
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Behaviour of tantalum in the presence of CO and CO/CO mixtures at elevated temperatures
Chrysanthou, A.; Grieveson, P. (1995-04)A study of the carburization of tantalum was carded out by reacting it with CO at temperatures in the range from 1073 K to 1573 K. In addition to TaC, TaO also formed as an intermediate product before full conversion to ... -
Formation of silicon carbide whiskers and their microstructure
Chrysanthou, A.; Grieveson, P.; Jha, A. (1991-01-01)Thermodynamic and kinetic conditions for the formation of SiC whiskers are established. The mechanism of their nucleation and growth are studied and, on this basis, the magnitude of the thermally activated barrier is ... -
The observation of metastable molybdenum carbides
Chrysanthou, A.; Grieveson, P. (1991-02-01) -
Re-evaluation of the thermodynamic stability of calcium oxide
Chrysanthou, A.; Grieveson, P. (1991-01-01)The reaction CaO+3C = CaC+CO was studied under controlled atmospheres between 1580°C and 1700°C. Reaction was observed to take place at CO pressures higher than those predicted by the available thermodynamic data. By ... -
Simultaneous carburisation and oxidation of niobium in the presence of carbon monoxide
Chrysanthou, A.; Grieveson, P. (1993-01-29)During reaction with CO, niobium was observed to carburise and oxidise simultaneously, with NbC, NbO and NbO forming as intermediate products before complete conversion to NbC. It was shown that the reason for such a complex ...