Structures of Dislocation Loops in Some Ceramics Induced by Fast Neutron Irradiation.
Structures of Dislocation Loops in Some Ceramics Induced by Fast Neutron Irradiation.
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快中子辐照引起的某些陶瓷中位错环的结构。
DOI：
10.2109/jcersj.111.155
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发表时间：
2003
影响因子：
1.1
通讯作者：
T. Yano
中科院分区：
文献类型：
--
作者：
T. Yano
/裂变或聚变核反应发射的快中子会在陶瓷中诱发各种晶体缺陷。这些缺陷会导致材料性能下降。高通量快中子辐照后，晶体材料中经常形成位错环。这些结构已基于高分辨率电子显微镜和基于缺陷模型的图像模拟进行了分析。综述了 SiC、AlN 和 Si 3 N 4 中形成的间隙环的局部原子构型。这些环通常形成在每个晶体中最紧密堆积的平面上，并且尽管有额外的厚度仅对应于一个四面体层，但布置了不止一层以形成特定的原子构型。根据这些缺陷的存在讨论这些材料的物理性能变化。
/Fast neutron emitted from the fission or fusion nuclear reactions induces various kinds of crystalline defects into ceramics. These defects can cause degradation of material properties. Dislocation loops are frequently formed in crystalline materials after high fluence fast neutron irradiation. These structures have been analyzed based on high-resolution electron microscopy and image simulations based on defects models. Local atomic configurations of interstitial loops formed in SiC, AIN and Si 3 N 4 are reviewed. These loops are commonly formed on the closest packing plane in each crystal, and more than one layer is arranged to form specific atomic configurations in spite of an extra thickness corresponding only one tetrahedral layer. Physical property changes of these materials are discussed based on the presence of these defects.
影响因子：
1.6
作者：
T. Yano;T. Iseki
通讯作者：
T. Yano;T. Iseki