γ辐照作用下GFRP电绝缘性能及其微观结构机理研究

doi:10.11896/cldb.19010132

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Abstract As composite materials, glass fiber reinforced plastics (GFRP) are used to make supporting equipment in high energy physics and nuclear physics experiments for its good electrical insulation property, thermal insulation property and mechanical performance. High-speed particles produce large amounts of γ or neutron irradiation in high energy physics and nuclear physics experiments. In order to ensure the stability of GFRP supporting equipment under the effect of irradiation, the electrical insulation property of GFRP must be researched under irradiation condition and the microstructure should be studied to reveal the microcosmic mechanism that causes the change of electrical insulation property. In this paper, the electrical insulation properties of GFRP were studied by electric-conductivity measure, scanning electron microscope, infrared spectrum and X-ray photoelectron spectroscopy. Then the microcosmic mechanism of irradiation damage was analyzed. The results showed that after γ irradiation of 20 kGy, 100 kGy and 200 kGy, the average electrical resistivity of GFRP increased from 8.16×10¹² Ω·m to 15.88×10¹² Ω·m, 23.13×10¹² Ω·m, and 43.15×10¹² Ω·m. There was a strong linear rule between the average resistivity and the dose of γ irradiation. It was found that there were some cracks on the surface of the glass fiber after γ irradiation. The epoxy resin became fragmenting and some pores appeared in it. The molecular bond was broken and the GFRP was oxidized. All these irradiation damages result in the rise of electrical resistivity. GFRP can meet high electrical insulation requirements in high energy physics and nuclear physics experiments under irradiation environments.

Key words： glass fiber reinforced plastic electrical insulation electrical resistivity γ irradiation epoxy resin

Published: 25 April 2020

CLC number:	TB332
	TL349

Fund:This work was financially supported by the National Natural Science Foundation of China (51605025), the Fundamental Research Funds for the Central Universities (FRF-GF-17-B19), and the Foundation of Major Program of National Key Research and Development Program of China (2016YFC0802905).

About author:: Lifang Zheng, is a professor of Mechanical Enginee-ring in University of Science and Technology Beijing(USTB), she is currently a doctoral supervisor. She graduated from USTB in 2000 with a bachelor’s degree and received her doctorate in 2008. She is the Senior Member of China Composites Society and the member of Youth Work Committee of China Composites Society. She won the second prize of Science and Technology Progress Award of the Ministry of Education, Outstan-ding Contribution Award of the National Major Scientific Project—Beijing Electron Positron Collider Major Reconstruction Project, the first prize of the 8th Young Teachers’ Teaching Basic Skills Competition of Beijing. She presided over 2 National Natural Science Foundation Projects and 4 Fundamental Research Funds for the Central Universities. She participated in 1 Foundation of Major Program of National Key Research and Development Program of China and 2 National Natural Science Foundation Projects. She has published over 20 EI/SCI papers. She was selected as the Young Talents Program of Beijing Universities in 2013.
Zhe Cuireceived a bachelor’s degree from Qingdao University of Technology in June 2017. In September 2017, he entered University of Science and Technology Beijing to pursue a master’s degree. He is mainly engaged in the research of materials performance under irradiation environment.

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Cite this article:

ZHENG Lifang,CUI Zhe,WANG Zhaozhong, et al. Study on Electrical Insulation Property and Microcosmic Mechanism of GFRP Under the Effect of γ Irradiation[J]. Materials Reports, 2020, 34(8): 8179-8183.

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http://www.mater-rep.com/EN/10.11896/cldb.19010132 OR http://www.mater-rep.com/EN/Y2020/V34/I8/8179

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