The Role of Residual Elastic Stress in Shrinkage of Cold-Pressed and Sintered Fuel Tablets

Yury Perlovich; Margarita Isaenkova; Olga Krymskaya; Vitaliy Baranov; Mikhail Perlovich; Andrey Tenishev

doi:10.4028/www.scientific.net/AMR.996.701

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 996The Role of Residual Elastic Stress in Shrinkage...

The Role of Residual Elastic Stress in Shrinkage of Cold-Pressed and Sintered Fuel Tablets

Abstract:

Manufacture of fuel tablets from UO₂ powder includes many processes, among which shrinkage without application of external loading till now requires explanations. Particles of UO₂ are brittle up to ~ 700°C. By cold pressing due to the porous structure of powder billets separate particles are pressing one into another with accompanying rise of residual elastic stress. Under following heating and sintering plasticization of UO₂ occurs, its yield stress decreases and conditions for creep and resulting shrinkage of tablets takes place.

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Periodical:

Advanced Materials Research (Volume 996)

Pages:

701-706

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.996.701

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Online since:

August 2014

Authors:

Yury Perlovich*, Margarita Isaenkova, Olga Krymskaya, Vitaliy Baranov, Mikhail Perlovich, Andrey Tenishev

Keywords:

Fuel Tablets, Plastic Deformation, Shrinkage, Sintering, Texture, Uranium Dioxide

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Creative Commons CC BY 4.0

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