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为满足工程应用领域对中子屏蔽材料力学性能的要求,采用短切碳纤维增强方法对传统的含B4C中子屏蔽材料进行了改良,研制出的新型B4C/环氧树脂基中子屏蔽材料具有良好的力学性能和屏蔽性能。重点研究了短切碳纤维含量、长度及表面处理工艺对碳纤维增强环氧树脂屏蔽材料力学性能的影响,结果表明,含10wt%B4C的碳纤维增强环氧树脂材料中树脂与纤维质量之比为5:1时,材料的拉伸强度最佳;当纤维长度为3–10 mm时,对材料拉伸性能影响较小;选用硅烷偶联剂KH-550进行纤维表面处理,能有效提高材料20%的拉伸性能。利用镅-铍中子源对含10wt%B4C碳纤维增强环氧树脂材料与含硼聚丙烯材料进行中子屏蔽比较实验,实验结果证明,该新型中子屏蔽材料能够满足中子屏蔽要求,具有良好的力学性能和广阔的应用前景。
In order to meet the requirements of mechanical properties of neutron shielding materials in engineering applications, the traditional B4C neutron shielding materials have been improved by using the chopped carbon fiber reinforced method. The new B4C / epoxy resin-based neutron shielding materials developed have good Mechanical and shielding properties. The effects of carbon fiber content, length and surface treatment on the mechanical properties of carbon fiber reinforced epoxy resin were studied emphatically. The results showed that the ratio of resin to fiber in carbon fiber reinforced epoxy resin containing 10wt% B4C was 5: 1, the tensile strength of the material is the best; when the length of the fiber is 3-10 mm, the tensile properties of the material have less effect; the selection of silane coupling agent KH-550 for fiber surface treatment can effectively improve the material 20% Tensile properties. The neutron source containing 10wt% B4C carbon fiber reinforced epoxy resin and boron-containing polypropylene was tested by neutron shielding using 镅-beryllium neutron source. The experimental results show that the new neutron shielding material can meet the requirements of neutron shielding with good The mechanical properties and broad application prospects.