Modelling of Grain Growth Kinetics in Porous Ceramic Materials under Normal and Irradiation Conditions

Materials

关键词: porous ceramics;    grain growth;    intergranular bubble and pores;    irradiated UO₂ fuel;   

DOI  :  10.3390/ma2031252

来源: mdpi

【 摘 要 】

Effect of porosity on grain growth is both the most frequent and technologically important situation encountered in ceramic materials. Generally this effect occurs during sintering, however, for nuclear fuels it also becomes very important under reactor irradiation conditions. In these cases pores and gas bubbles attached to the grain boundaries migrate along with the boundaries, in some circumstances giving a boundary migration controlled by the movement, coalescence and/or sintering of these particles. New mechanisms of intergranular bubble and pore migration which control the mobility of the grain boundary under normal and irradiation conditions are reviewed in this paper.

【 授权许可】

CC BY   
© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.