UN-UB 2 Composite fuel material; improved water tolerance with integral burnable absorber
UN-UB 2 Composite fuel material; improved water tolerance with integral burnable absorber
复制标题
UN-UB 2 复合燃料材料；
DOI：
10.1016/j.jnucmat.2021.153471
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发表时间：
2022
影响因子：
3.1
通讯作者：
Turner J
中科院分区：
文献类型：
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作者：
Turner J
作为研究UN-UB2复合材料初步可行性的范围研究的一部分，通过放电等离子烧结与高密度联合国材料一起生产了联合国内5%、25%和50%UB2的颗粒。结果表明，球团矿具有致密致密的组织，在1273K下保温24小时后，组织结构没有发生变化，由UB2、UB2和UBN相组成，EBSD分析表明，还存在UB0.1N0.9相。结果表明，添加2 5%的UB2可使反应起始温度提高约15 0K，仅含5%UB2的球团矿的起始温度明显提高12 0K。高密度UN与这些复合材料一起测试，表现相似，但复合材料氧化后的微观结构分析表明，除高密度区外，多孔区的氧化速率也有所减缓。
As part of a scoping study to investigate the initial feasibility of UN-UB 2 composites, pellets of 5, 25 and 50% UB 2 within UN were produced via Spark Plasma Sintering alongside a high density UN material. The pellets were seen to have a well-formed and dense microstructure which did not appear to change after annealing for 24 hours at 1273 K, which consisted of UN, UB 2 and a UBN phase, with an additional UB 0.1 N 0.9 phase suggested via EBSD. Steam exposure in an STA demonstrated that an increase in reaction onset temperature of approximately 150 K can be achieved via the addition of 25% UB 2, and an increase of 120 K in onset temperature was evident in pellets containing only 5% UB 2. High density UN was tested alongside these composites and behaved similarly, but microstructural examination of composites post-oxidation suggest that the oxidation rate is retarded in porous regions in addition to highly dense regions.