# Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2019, Vol. 30 ›› Issue (7): 115

### Effects of energy deposition on mechanical properties of sodium borosilicate glass irradiated by three heavy ions: P, Kr and Xe

Xin Du1, Tian-Tian Wang1, Bing-Huang Duan1, Xiao-Yang Zhang1, Feng-Fei Liu1, Chang-Lin Lan1, Guang-Fu Wang2, Liang Chen1, Hai-Bo Peng1, Tie-Shan Wang1

1. 1School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
2Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875, China
• Received:2018-09-21 Revised:2019-03-20 Accepted:2019-03-31
• Contact: Hai-Bo Peng E-mail:penghb@lzu.edu.cn
• Supported by:
This work was supported by the National Natural Science Foundations of China (Nos. 11505085 and 11505086), the Fundamental Research Funds for the Central Universities (No. lzujbky-2018-72), and DSTI Foundation of Gansu (No. 2018ZX-07).
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Xin Du, Tian-Tian Wang, Bing-Huang Duan, Xiao-Yang Zhang, Feng-Fei Liu , Chang-Lin Lan, Guang-Fu Wang, Liang Chen, Hai-Bo Peng, Tie-Shan Wang. Effects of energy deposition on mechanical properties of sodium borosilicate glass irradiated by three heavy ions: P, Kr and Xe.Nuclear Science and Techniques, 2019, 30(7): 115

Abstract: Sodium borosilicate glasses are candidate materials for high-level radioactive waste (HLW) vitrification; therefore, understanding the irradiation effects in model borosilicate glass is crucial. Effects of electronic energy deposition and nuclear energy deposition induced by the impact of heavy ions on the hardness and Young's modulus of sodium borosilicate glass were investigated. The work concentrates on sodium borosilicate glasses, henceforth termed NBS1 (60.0% SiO2, 15.0% B2O3 and 25.0% Na2O in mol %). The NBS1 glasses were irradiated by P, Kr and Xe ions with 0.3 MeV, 4 MeV and 5 MeV respectively. The hardness and Young's modulus of ion-irradiated NBS1 glasses were measured by nanoindentation tests. The relationships between the evolution of the hardness, the change in the Young’s modulus of the NBS1 glasses, and the energy deposition were investigated. With the increase of the nuclear energy deposition, both the hardness and Young's modulus of NBS1 glasses dropped exponentially and then saturated. Regardless of the ion species, the nuclear energy depositions required for the saturation of hardness and Young's modulus were apparent at approximately 1.2×1020 keV/cm3 and 1.8×1020 keV/cm3, respectively. The dose dependency of the hardness and Young's modulus of NBS1 glasses was consistent with previous studies by Peuget et al. Moreover, the electronic energy loss is less than 4 keV/nm, and the electronic energy deposition is less than 3.0×1022 keV/cm3 in this work. Therefore, the evolution of hardness and Young's modulus could have been primarily induced by nuclear energy deposition.