Page 24 - 《摩擦学学报》2021年第2期

第 41 卷 第 2 期 摩 擦 学 学 报 Vol 41 No 2
2021 年 3 月 Tribology Mar, 2021

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

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1*
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柴利强 , 宁可心 , 乔 丽 , 王 鹏 , 翁立军 1*
(1. 中国科学院兰州化学物理研究所 固体润滑国家重点实验室，甘肃 兰州 730000;
2. 中国科学院大学，北京 100049)
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sp 杂化C原
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子结构向sp 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.
关键词: γ辐照; a-C: H 薄膜; 微观组织; 力学性能; 摩擦磨损
中图分类号: TH117.3 文献标志码: A 文章编号: 1004-0595(2021)02–0169–07

Influence of Gamma Irradiation on Microstructure, Mechanical

Properties and Tribological Properties of a-C: H Films

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CHAI Liqiang , NING Kexin , QIAL Li , WANG Peng , WENG Lijun
(1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences,
Gansu Lanzhou 730000, China
2. University of Chinese Academy of Sciences, Beijing 100049, China)
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
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structure of a-C: H films had a change from sp hybrid C atomic to sp 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.
Key words: gamma irradiation; a-C: H films; microstructure; mechanical properties; friction and wear

Received 25 May 2020, revised 28 June 2020, accepted 28 June 2020, available online 28 March 2021.
*Corresponding author. E-mail: pengwang@licp.cas.cn, Tel: +86-931-4968144; E-mail: wenglj@licp.cas.cn, Tel: +86-931-4968003.
The project was supported by CAS “Light of West China” Program and National key R&D project (2017YFE0302500).
西部之光交叉团队和国家重点研发计划项目(2017YFE0302500)资助.