Carbide uranium

As previously stated, uranium carbides are used as nuclear fuel (145). Two of the typical reactors fueled by uranium and mixed metal carbides are thermionic, which are continually being developed for space power and propulsion systems, and high temperature gas-cooled reactors (83,146,147). In order to be used as nuclear fuel, carbide microspheres are required. These microspheres have been fabricated by a carbothermic reduction of UO and elemental carbon to form UC (148,149). In addition to these uses, the carbides are also precursors for uranium nitride based fuels. 

The solid corrosion products in carbon dioxide and carbon monoxide are uranium dioxide, uranium carbides and carbon. The major reaction with carbon dioxide results in the formation of carbon monoxide ... 

Galvanic corrosion reports have emerged from two sources. In the first , the chemical compatibility of uranium carbides and Cr-Fe-Ni alloys was discussed. Evaluation was by thermodynamic modelling and experimental... 

Uranium. tetrathiocyanatotetrakis[tris-(dimethylamino)phosphine oxide]-structure, 1.87 Uranium carbide nuclear fuels dissolution, 6, 928 Uranium complexes, 3,1131-1215 carbamic acid... 

Phosphorus Silane Phosphine Calcium carbide Uranium carbide... 

Uranium carbide emits brilliant sparks on impact, ignites on grinding in a mortar [1], or on heating in air to 400°C [2],... 

Monorubidium acetylide ignites in molten sulfur barium carbide ignites in sulfur vapour at 150°C and incandesces while calcium, strontium, barium and uranium carbides need a temperature around 500°C to ignite. 

Four equations and 5 independent angles have been used154 to estimate the 7S of the uranium carbide of the composition near to UC. In addition to Eq. (56) supposedly valid for the point at which a boundary between two UC grains emerges toward an argon atmosphere, also the relation... 

Unfortunately, the system selected was not in physico-chemical equilibrium uranium carbide was gradually going into solution in liquid uranium, and intergranular penetration and erosion of UC occurred to an extent which increased with temperature that was varied between 1180° and 1720 °C. No wonder then, that the 6 observed in different tests was as low as 37° and as high as 110°. Also for the surface tension 7 of liquid uranium values from 780 to 1510 dyne/cm have been obtained at a constant temperature of 1600 °C. The ys of UC in argon was estimated to be approximately 730 erg/cm2 at 1325 °C, and 7si (at the boundary U — UC) appeared to be near 140 erg/cm2 at 1100 °C. 

Trimercuiy tetraphosphide, 4616 Tungsten carbide, 0563 Uranium carbide, 0562 Uranium dicarbide, 1028 Zinc phosphide, 4876 Zirconium dicarbide, 1029 METAL PNICTIDES... 

Uranium carbide, 0562 Uranium(lII) nitride, 4732 Uranium(lV) oxide, 4843 Zinc, 4927... 

In October, 1910, the author had established the fact that certain magnetites as well as synthetic iron catalysts can be as effective as the uranium carbide catalyst which, in the hands of F. Haber, had proved to be of outstanding activity. At 500°C. and at a pressure of 100 atmospheres and a gas velocity of 50 liters per hour, 5 volume % of ammonia were obtained in the exit gases with 2 g. of a magnetite and 4.5% with a synthetic iron catalyst, the latter being operated at 550°C. 

Both carbon monoxide and carbon dioxide oxidize uranium at 750°C forming uranium dioxide, UO2, along with uranium carbide, UC. 

Uranium hexafluoride is prepared by the reaction of fluorine on uranium metal, triuranium octafluoride, uranium pentachloride, or uranium carbide. 

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