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CN  62-1095/O4

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柴利强, 宁可心, 乔丽, 王鹏, 翁立军. γ辐照对a-C: H薄膜微观组织、力学性能及摩擦学性能的影响[J]. 摩擦学学报, 2021, 41(2): 169-175. DOI: 10.16078/j.tribology.2020093
引用本文: 柴利强, 宁可心, 乔丽, 王鹏, 翁立军. γ辐照对a-C: H薄膜微观组织、力学性能及摩擦学性能的影响[J]. 摩擦学学报, 2021, 41(2): 169-175. DOI: 10.16078/j.tribology.2020093
CHAI Liqiang, NING Kexin, QIAL Li, WANG Peng, WENG Lijun. Influence of Gamma Irradiation on Microstructure, Mechanical Properties and Tribological Properties of a-C: H Films[J]. TRIBOLOGY, 2021, 41(2): 169-175. DOI: 10.16078/j.tribology.2020093
Citation: CHAI Liqiang, NING Kexin, QIAL Li, WANG Peng, WENG Lijun. Influence of Gamma Irradiation on Microstructure, Mechanical Properties and Tribological Properties of a-C: H Films[J]. TRIBOLOGY, 2021, 41(2): 169-175. DOI: 10.16078/j.tribology.2020093

γ辐照对a-C: H薄膜微观组织、力学性能及摩擦学性能的影响

Influence of Gamma Irradiation on Microstructure, Mechanical Properties and Tribological Properties of a-C: H Films

  • 摘要: 近年来随着核能及其核装备的发展,辐照环境下高能粒子对润滑材料服役行为的影响受到越来越多的关注. 本研究利用自行设计研制的磁控溅射系统制备a-C: H润滑薄膜,并对其进行伽马 (γ) 辐照处理. 考察γ辐照康普顿效应对a-C: H薄膜微观组织、力学性能和摩擦学性能的影响. 结果表明:经γ辐照后a-C: H薄膜存在由sp2杂化C原子结构向sp3杂化C原子结构转变的趋势,且辐照使得C-H键发生断裂,薄膜内H原子的键合能降低. 伽马辐照使得a-C: H薄膜的纳米机械性能显著提高,辐照样品的残余应力也随辐照剂量呈增加趋势. 此外,γ辐照也使得a-C: H薄膜的摩擦系数和磨损率轻微增加. 综合分析可知,γ辐照在测试剂量范围内对a-C: H薄膜的摩擦性能影响有限,但辐照诱发应力的增加是限制其在核环境中应用的主要因素.

     

    Abstract: With the development of nuclear energy and nuclear equipment in recent years, more and more attention has been paid to the influence of high-energy particles on the service behavior of lubricating materials under the irradiation environment. In this paper, a-C: H films were deposited by a magnetron sputtering system designed by ourselves and then irradiated by gamma ray source. The influences of Compton effects induced by gamma irradiation on microstructure, mechanical and tribological properties of a-C: H films were investigated. The results showed that the structure of a-C: H films had a change from sp2 hybrid C atomic to sp3 hybrid C atomic after irradiation. The breakages of C-H bonds occurred due to the collision of gamma ray and the bonding energy of H atoms in the film reduced. Compared with the pristine samples, the nanometer mechanical properties as well as the internal stress of the irradiated a-C: H film increased significantly. The irradiated film at 13.5 MGy dose observed the local peeling due to the effect of internal stress. In addition, the friction coefficient and wear rate of the a-C: H films were slightly increased induced by irradiation. The comprehensive analysis showed that the effect of irradiation on the frictional properties of a-C: H films was limited, but the increase of internal stress was the key factor limiting their application in the nuclear environment.

     

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