Abstract
An attempt has been made to analyse the sintering data of urania powder compacts prepared form its precursor ammonium diuranate calcined and sintered in hydrogen atmosphere for various soaking times and temperatures. Better sintering behaviour was observed in compacts prepared from powders calcined below 800 ° C, which were non-crystalline under X-ray diffraction study. Frenkel's sintering mechanism as applicable for the non-crystalline powders was applied to understand the densification behaviour in which the viscosity term was linearly related to shear stress and strain rate as also its relationship with time was assumed to be either linear or exponential in nature. A plot between shear stress (to induce densification) and time indicated that (i) a critical time ( T crit ) is necessary to induce any observable sintering stress in these powders and T crit , values increased with decrease in calcination temperature and (ii) the amount of shear stress increased with higher sintering temperatures and was related to time, exponentially.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
