Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1566108 | Journal of Nuclear Materials | 2012 | 9 Pages |
Abstract
To study the effect of oxygen partial pressure on grain growth in Cr2O3 doped UO2 pellets, small amount of Cr2O3 doped UO2 samples have been sintered with and without a stepwise change of sintering atmospheres. An introduction of a stepwise increase of oxygen potential during the isothermal sintering stage enhances the grain growth of UO2 pellets greatly. This stepwise sintering effect has been explained in terms of a maximized residual Cr3+ concentration in grain boundaries throughout the entire sintering process. It was demonstrated that a stepwise sintering technique can reduce the doped amount of Cr2O3 to a minimum level while keeping the large grain size.
Related Topics
Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
Jae Ho Yang, Keon Sik Kim, Ik Hui Nam, Jang Soo Oh, Dong-Joo Kim, Young Woo Rhee, Jong Hun Kim,