Some investigations on the uranium: Thorium : Carbon system

Autor:	N. Brett, D. Law, D.T. Livey
Rok vydání:	1960
Předmět:	Argon Polymers and Plastics Metallurgy Analytical chemistry chemistry.chemical_element Thorium Sintering Uranium Decomposition Chemical reaction chemistry Materials Chemistry Carbon Solid solution
Zdroj:	Journal of Inorganic and Nuclear Chemistry. 13:44-53
ISSN:	0022-1902
DOI:	10.1016/0022-1902(60)80234-5
Popis:	The dicarbides of uranium and thorium have been prepared by sintering mixtures of the elemental powders at 1500°C and 1800°C respectively. Uranium dicarbide is stable in air at room temperature; in pellet form as prepared it breaks down in dry air between 200° and 300°C and in moist argon between 300° and 400°C. Thorium dicarbide decomposes rapidly at room temperature by reaction with atmospheric moisture. The system UC2ThC2 has been investigated by preparation of fused specimens of mixed crystals and examination of these by X-ray and by microscope. The evidence from both sources shows that the system is one of complete solid solubility although the middle ranges of composition are poorly crystalline. Stability tests on mixed crystals of dicarbides show that they are stable to between 200° and 400°C in dry oxygen, the temperature of oxidation increasing from ∼200°C at the ThC2 end of the system to ∼400°C at the UC2 end. Oxidation forms mixed crystals of UO2ThO2 cubic solid solution. Some information is given on uranium-thorium-carbon compacts containing principally the monocarbides. X-ray examination indicates that this system also is one of complete solid solubility.
Databáze:	OpenAIRE
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