核辐照下SiCf/SiC复合材料包层管夹紧摩擦行为研究

IF 6.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL Friction Pub Date : 2023-12-05 DOI:10.1007/s40544-023-0805-z
Chenglong Xiao, Liangliang Shen, Tianqi Zhu, Jianbo Tang, Ximing Xie, Xinyu Fan, Jian Xu, Zhiying Ren
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引用次数: 0

摘要

碳化硅纤维增强碳化硅基(SiCf/SiC)复合材料是核燃料的关键包层材料,它决定了核燃料储运的安全性和可靠性。其储运场景的更换需要机械手来完成,但由于对损伤机理认识不清,严重限制了SiCf/SiC磨损、断裂、核泄漏在辐照环境中脆-柔-刚接触抓取过程中的应用。因此,本文研究了辐照剂量和夹紧载荷对SiCf/SiC包层管接触界面摩擦特性的影响,得到了辐照参数和夹紧力对包层管与柔性腈接触界面静摩擦系数的影响。在Greenwood-Williamson摩擦学模型的基础上,引入多面积分,建立了夹紧界面微观尺度下接触微凸形状和结构的数值模型,并通过实验进行了验证。研究结果表明:核辐照环境下SiCf/SiC包层管夹紧条件下存在独特的“辐照抑制区”,且在辐照达到一定程度(600 kGy)后,静摩擦系数的增长放缓直至停滞,随着辐照剂量的继续增加,静摩擦系数会出现下降;其中,在1000 kGy辐照区间内,15.2 N的夹紧力可以满足核环境运行的安全要求。研究结果可为SiCf/SiC包层管在储运夹紧过程中的安全运行提供重要的理论依据和应用指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Study on frictional behavior of SiCf/SiC composite clad tube clamping condition under nuclear irradiation

Silicon carbide fiber reinforced silicon carbide matrix (SiCf/SiC) composite is the key cladding material of nuclear fuel, which determines the safety and reliability of nuclear fuel storage and transportation. The replacement of its storage and transportation scenario needs to be completed by the manipulator, but the application of SiCf/SiC wear, fracture, and nuclear leakage in the snatching process of brittle-flexible-rigid contact in the irradiation environment has been seriously restricted due to unclear understanding of the damage mechanism. Therefore, the effects of irradiation dose and clamping load on the friction characteristics of the contact interface between SiCf/SiC clad tube are studied in this paper, and the effects of irradiation parameters and clamping force on the static friction coefficient of the contact interface between the clad tube and flexible nitrile are obtained. Based on the Greenwood-Williamson tribological model, a numerical model of the shape and structure of the contact micro-convex at the micro-scale of the clamping interface is constructed by introducing the multi-surface integral, and finally verified by experiments. The research results show that there is a unique “Irradiation suppression zone” under the clamping condition of SiCf/SiC cladding tube under the nuclear irradiation environment, and the growth of static friction coefficient slows down until stagnates after irradiation reaches a certain extent (600 kGy), and there will be a decline when the irradiation dose continues to increase, among which the clamping force of 15.2 N within the irradiation interval of 1,000 kGy can meet the safety of nuclear environment operation. The results of this paper can provide an important theoretical basis and application guidance for the safe operation of SiCf/SiC cladding tubes in the storage and transportation clamping process.

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来源期刊
Friction
Friction Engineering-Mechanical Engineering
CiteScore
12.90
自引率
13.20%
发文量
324
审稿时长
13 weeks
期刊介绍: Friction is a peer-reviewed international journal for the publication of theoretical and experimental research works related to the friction, lubrication and wear. Original, high quality research papers and review articles on all aspects of tribology are welcome, including, but are not limited to, a variety of topics, such as: Friction: Origin of friction, Friction theories, New phenomena of friction, Nano-friction, Ultra-low friction, Molecular friction, Ultra-high friction, Friction at high speed, Friction at high temperature or low temperature, Friction at solid/liquid interfaces, Bio-friction, Adhesion, etc. Lubrication: Superlubricity, Green lubricants, Nano-lubrication, Boundary lubrication, Thin film lubrication, Elastohydrodynamic lubrication, Mixed lubrication, New lubricants, New additives, Gas lubrication, Solid lubrication, etc. Wear: Wear materials, Wear mechanism, Wear models, Wear in severe conditions, Wear measurement, Wear monitoring, etc. Surface Engineering: Surface texturing, Molecular films, Surface coatings, Surface modification, Bionic surfaces, etc. Basic Sciences: Tribology system, Principles of tribology, Thermodynamics of tribo-systems, Micro-fluidics, Thermal stability of tribo-systems, etc. Friction is an open access journal. It is published quarterly by Tsinghua University Press and Springer, and sponsored by the State Key Laboratory of Tribology (TsinghuaUniversity) and the Tribology Institute of Chinese Mechanical Engineering Society.
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