Measurement of void volume of a fuel rod and the exchange of occluded gases from mixed carbide fuel with filling gas helium

Rao, Govind; Kukarni, S.G.; Venugoopal, V.; Manchanda, V. Κ.; Goswami, G.

doi:10.1016/0022-3115(94)00404-8

Cited by 2 publications

(1 citation statement)

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“…As the growing atmosphere is Ar + H 2 , H 2 gas may react with carbides leading to methane gas (CH 4 ). Alternatively, carbides can also be released from the film through the formation of CO gas as long as oxygen is available in CeO 2 [27].…”

Section: Resultsmentioning

confidence: 99%

Nanostructural control in solution-derived epitaxial Ce_1−xGd_xO_2−yfilms

et al. 2008

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A novel mechanism based on aliovalent doping, allowing fine tuning of the nanostructure and surface topography of solution-derived ceria films, is reported. While under reducing atmospheric conditions, non-doped ceria films are inherently polycrystalline due to an interstitial amorphous Ce(2)C(3) phase that inhibits grain growth, a high quality epitaxial film can be achieved simply by doping with Gd(3+) cations. Gd(3+) [Formula: see text] Ce(4+) substitutions within the lattice are accompanied by charge-compensating oxygen vacancies throughout the volume of the crystallites acting as an efficient vehicle to reduce the barrier for grain boundary motion caused by interstitial Ce(2)C(3). In this way, the original nanostructure is self-purified by pushing the amorphous Ce(2)C(3) phase towards the free surface of the film. Once a full epitaxial cube-on-cube oriented ceria film is obtained, its surface morphology is dictated by the interplay between faceting on low energy {110} and/or {111} pyramidal planes and truncation of those pyramids by (001) ones. The development of the latter requires the suppression of their polar character which is thought to be achieved by charge compensation between the dopand and oxygen along [Formula: see text] directions.

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Section: Resultsmentioning

confidence: 99%