The Mutual Solid Solubility of Hafnium Carbide and Uranium Monocarbide

Abstract

SUMMARYMeasurements of the detonation wave structure at the axis of long cylindrical charges of nitromethane and TNT are described. The measurements show that the structure consists of three zones: (1) a reaction zone, (2) zones, is not predicted by any extrapolation of one-dimensional theory. *In the liquid explosive nitromethane, the pressure at the head of the decay zone is essentially independent of the charge size, but the extent of the zone is very strongly dependent an the charge diameter and length.The decay zone increases in length as the detonation runs. In a 37 mm diameter charge, after a run of 16 diameters, the decay zone is about 0.6 mm long and the pressure falls about 27 kbar in the zone.

Hafnium Carbide: Prediction of Crystalline Structures and Investigation of Mechanical Properties

“…Its high melting point, approximately 3900 • C, has attracted interest since a superior level of hardness can be inferred from a high melting point [18]. HfC can form solid solutions with various chemical systems, e.g., with TaC [19], ZrC [20], SiC [21], uranium monocarbide (UC) [22], and more complex ones like (Hf, Ta)C/SiC, and (Hf, Ti)C/SiC [23], SiC/(Hf, Ta)C(N)/(B)C [24], etc.…”

Experimental investigation and thermodynamic evaluation of the C–Hf–O ternary system

“…These three carbides present a rock salt type structure of metal cations where octahedral sites are occupied by carbon atoms. However, it is well‐known that these phases could admit a nonstoichiometry (x) in carbon MeC x which modifies the value of their cell parameter . The most common industrial route to synthesize hafnium carbide consists in carburizing the hafnium dioxide (HfO 2 ) according to the following equation:…”