摘要
用正电子湮没寿命谱仪对U3Si2-Al燃料板样品的正电子湮没寿命进行了测量及分析,得到不同工艺状况下燃料包壳材料微观缺陷的形态及变化趋势。回火态燃料板包壳基体中的微观缺陷以单空位的点缺陷为主;冷作态中的缺陷以双空位、位错等缺陷为主;冲刷态中的缺陷以层错、小的空位团等缺陷为主。3种样品中,均未发现影响燃料板安全的大空位团缺陷。回火和冲刷等工艺或运行工况,会使燃料板包壳基体中的微观缺陷发生转变,并改变了燃料板的宏观力学性能。
Microstructure damage configuration and transformation of shell materials for U3Si2-Al fuel plates under different technical conditions were studied by positron annihilation technique. The study showed that micro-effects in the shell material for tempered fuel plates were mostly single vacancy point defects, that in cooled fuel plates were mostly couple vacancies and dislocation, and that in eroded fuel plates were mostly layer-dislocation and small vacancy groups. There were no large vacancy groups which had effect on the safety of fuel plates in all samples. Some technique such as temper and eroding would change microstructure damage of shell materials, and also alter mechanical capability of fuel plates.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2008年第5期38-42,共5页
Nuclear Power Engineering
