| METALS AND METAL MATRIX COMPOSITES |
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| Irradiation Tolerance of Cu Nanograins on a Carbon Nanotube Scaffold |
| MAO Pengyan1,*, ZHAO Hui1, LI Hongda2, TAI Kaiping3,4,*
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1 School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159, China
2 School of Equipment Engineering, Shenyang Ligong University, Shenyang 110159, China
3 Shenyang National Laboratory of Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
4 School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China |
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Abstract Carbon nanotube (CNT)-copper (Cu) hybrid deposited by magnetron sputtering technique is a novel nano-porous material, and the CNT-Cu hybrid could be attractive for use in future nuclear reactors by sticking on the structural components. In this work, CNT-Cu hybrids differed in thickness were prepared by means of magnetron sputtering. Combined with the dehydrogenation effect of He ions irradiation on organic vapor of paraffin-based mineral oil at room temperature, carbon layer was coated on the CNT-Cu hybrid. The irradiation tolerance of the hybrid with and without carbon layers are carefully investigated. We found that with irradiation dose and irradiation temperature increasing, voids gradually appear, and the size and density of voids is small, which is related to the high grain boundary volume fraction, specific surface area and low diffusion rate of irradiation-induced defects. The growth in grain size of the CNT-Cu hybrid is much lower than that of the Cu films deposited on the Si/SiO2 substrate, which is derived from the inhibition of grain boundary migration along the perpendicular to the CNT axial direction. The CNT-Cu hybrid after carbon coating exhibits significantly enhanced thermal structural stability and irradiation tolerance, owing to the high grain boundary volume fraction, specific surface area and stable nano-grains.
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Published: 10 October 2024
Online: 2024-10-23
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| Fund:Postdoctoral Scientific Research Foundation of Shenyang Ligong University, the Doctoral Research Foundation Project of Liaoning Science and Technology Department (2022-BS-184), the High-Level Talent Research Support Program of Shenyang Ligong University (1010147001266), the Basic Scientific Research Project of Education Department of Liaoning Provincial (JYTQN2023052), and the Special Fund for Basic Scientific Research of Undergraduate Universities in Liaoning Province (SYLUGXRC23). |
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2024, Vol. 38 
