Effects of γ irradiation on the compression and inter-laminar shear properties of G10 for the BESIII beam pipe supporting flange
Effects of γ irradiation on the compression and inter-laminar shear properties of G10 for the BESIII beam pipe supporting flange
复制标题
γ辐照对BESIII梁管支撑法兰G10压缩和层间剪切性能的影响
DOI：
10.1016/j.fusengdes.2017.02.029
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发表时间：
2017-04
影响因子：
1.7
通讯作者：
Li Wang
中科院分区：
文献类型：
--
作者：
Lifang Zheng;Zhiming Qiao;Xiaohui Xu;Li Wang
G10环氧玻璃布层压板（G10）具有优良的电绝缘性能和机械性能，被用作北京正负电子对撞机（BECPII）北京谱仪III束管支撑法兰的备件材料。然而，在BECPII操作期间，束管遭受显著量的γ和中子照射。研究表明，当G10暴露于γ辐照足够长的时间时，材料将被损坏，其机械性能将发生变化。在本工作中，G10样品的压缩强度和层间剪切强度（ILSS）的测试。结果表明，经20和200 kGy γ射线辐照后，抗压强度分别下降1.26%和2.15%，ILSS分别提高16.17%和17.95%;通过扫描电子显微镜研究了样品的微观结构图案。γ射线照射后，环氧树脂基体牢固的网状结构被破坏，玻璃纤维与环氧树脂之间的粘结界面被破坏。玻璃纤维经γ射线辐照后出现微裂纹。通过红外光谱分析了辐照前后的环氧树脂。结果表明，环氧树脂在辐照过程中以降解反应为主，而环氧树脂中则以交联反应为主，导致分子链断裂。环氧树脂之间的结合程度也降低。
Given their excellent electrical insulating performance and mechanical properties, G10 epoxy glass cloth-laminated sheets (G10) are used as spare materials for the supporting flange of the Beijing Spectrometer III beam pipe in the Beijing Electron Positron Collider II (BECPII). However, during BECPII operation, the beam pipe suffers a significant amount of γ and neutron irradiation. Studies have demonstrated that when the G10 is exposed to γ irradiation for a sufficiently long time, the material will become damaged, and its mechanical properties will change. In the present work, the compression strength and inter-laminar shear strength (ILSS) of G10 samples were tested. Results showed that after 20 and 200 kGy γ irradiation, the compression strength decreased by 1.26% and 2.15%, respectively, whereas the ILSS increased by 16.17% and 17.95%, respectively. The micro-structural pattern of the samples was investigated by scanning electron microscopy. The firm mesh structure of the epoxy resin matrix was destroyed, and the bonding interface between the glass fibers and the epoxy resin was damaged after γ irradiation. Some microcracks were observed in the glass fibers after γ irradiation. The epoxy resin before and after the irradiation was analyzed by infrared spectroscopy. Results showed that the degradation reaction was dominant during the irradiation compared with the cross-linking reaction in the epoxy resin, leading to the fracture of the molecular chain. The degree of binding between the epoxy resin also decreased.
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DOI：
10.1016/b978-0-323-46140-5.00004-2
发表时间：
2017-01-01
期刊：
SPECTROSCOPIC METHODS FOR NANOMATERIALS CHARACTERIZATION
影响因子：
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通讯作者：
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2005
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