10B areal density: A novel approach for design and fabrication of B4C/6061Al neutron absorbing materials
10B areal density: A novel approach for design and fabrication of B4C/6061Al neutron absorbing materials
复制标题
DOI：
10.1016/j.jnucmat.2017.02.020
复制
发表时间：
2017-04
影响因子：
3.1
通讯作者：
Yuli Li;Wen-xian Wang;Junying Zhou;C. Hongsheng;Peng Zhang
中科院分区：
文献类型：
--
作者：
Yuli Li;Wen-xian Wang;Junying Zhou;C. Hongsheng;Peng Zhang
本文通过建立材料的 10B 面密度（10BAD）与其中子吸收比之间的直接关系，首次提出了一种评估含硼中子吸收材料中子屏蔽性能的新方法。研究发现，当材料的10BAD大于0.034 g/cm2时，该材料将获得良好的中子屏蔽性能。基于该方法，采用真空热压和热挤压成功制备了不同 B4C 含量（10 wt%、20 wt%、30 wt%）的 B4C/6061Al 复合材料板。利用透射电子显微镜（TEM）详细研究了B4C/Al界面的特征，并研究了B4C颗粒含量对Al基体微观结构和力学性能的影响。通过目前的研究，发现B4C/6061Al复合材料板具有良好的中子屏蔽性能和拉伸强度，可以使用20 wt% B4C含量、4.5 mm板厚或30 wt% B4C含量、3 mm板厚制备B4C/6061Al复合板。
In this paper, a novel approach to evaluate the neutron shielding performance of a boron-containing neutron absorbing material was proposed for the first time through the establishment of a direct relationship between10B areal density (10BAD) of the material and its neutron absorption ratio. It is found when the10BAD of a material is greater than 0.034 g/cm2, the material will achieve a good neutron shielding performance. Based on this proposed approach, B4C/6061Al composite plates with different B4C content (10 wt%, 20 wt%, 30 wt%) were successfully fabricated using vacuum hot pressing followed by hot-extrusion. The characteristics of the B4C/Al interface were studied in details using transmission electron microscopy (TEM), and the effects of B4C particle content on microstructure and mechanical properties of the Al matrix were investigated. Through current studies, B4C/6061Al composite plates possessing good neutron shielding performance and tensile strength are found to be able to be fabricated using either 20 wt% of B4C content with a plate thickness of 4.5 mm or 30 wt% B4C content with a plate thickness of 3 mm.