基于Si_(3)N_(4)晶须/石墨烯协同减摩的Si_(3)N_(4)陶瓷摩擦学性能研究  

Tribological Properties of Si_(3)N_(4)Ceramics Based on Synergistic Friction Reduction of Si_(3)N_(4)Whisker/Graphene

作　　者：陈飞 尹延经 孙小波[1,2] 闫柯 洪军[1] CHEN Fei;YIN Yangjing;SUN Xiaobo;YAN Ke;HONG Jun(Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System,Xi’an Jiaotong University,Xi’an 710049,China;Luoyang Bearing Research Institute Co.,Ltd.,Luoyang 471039,China)

机构地区：[1]西安交通大学现代设计及转子轴承系统教育部重点实验室,西安710049 [2]洛阳轴承研究所有限公司,河南洛阳471039

出　　处：《轴承》2025年第4期92-100,共9页Bearing

基　　金：中央高校基本科研业务费专项资金资助项目(xzy012024026)。

摘　　要：面向航空航天轴承对润滑的需求,提出了基于Si_(3)N_(4)晶须(β-Si_(3)N_(4)w)、多层石墨烯(MLG)减摩的Si_(3)N_(4)陶瓷轴承材料技术,并利用放电等离子烧结技术制备了MLG和β-Si_(3)N_(4)w质量分数各为1%的Si_(3)N_(4)陶瓷试样。基于球-盘摩擦磨损试验机对其开展了5~20 N载荷及20~200 mm/s线速度下的摩擦学性能试验,结果表明:当线速度为20 mm/s和载荷为5~20 N时,试样干滑动摩擦系数达到0.044~0.048;当载荷为10 N和线速度为50~200 mm/s时,试样干滑动摩擦系数有所增大,约为0.27~0.30;磨损率随着载荷增加而减小,比传统Si_(3)N_(4)陶瓷磨损率减小了33.0%~62.4%,而线速度对磨损率影响规律不明显。分析认为,MLG润滑膜、MLG/β-Si_(3)N_(4)w对基体硬度的改善及氧化物的作用是摩擦系数降低以及耐磨性提高的主要原因。Aimed at the lubrication requirements of aerospace bearings,a Si_(3)N_(4)ceramic bearing material technology is proposed based on friction reduction of Si_(3)N_(4)whisker(β-Si_(3)N_(4)w)and multilayer graphene(MLG).The Si_(3)N_(4)ceramic samples with MLG/β-Si_(3)N_(4)w content of 1 wt%are prepared using spark plasma sintering technology.The tribological properties of the samples are tested on a ball-on-disk friction and wear tester under loads of 5~20 N and linear velocities of 20~200 mm/s.The results show that the dry sliding coefficient of friction(COF)of the samples is 0.044~0.048 under linear velocity of 20 mm/s and loads of 5~20 N;the dry sliding COF increases to approximately 0.27~0.30 under load of 10 N and linear velocities of 50~200 mm/s;the wear rate decreases with the increase of load,which is nearly 33.0%~62.4%lower than that of traditional Si_(3)N_(4)ceramics,while the influence of linear velocity on wear rate is not significant.The analysis suggests that MLG lubricating film,improvement of matrix hardness by MLG/β-Si_(3)N_(4)w and effect of oxides are main reasons for reduction of COF and improvement of wear resistance.

关 键 词：滚动轴承 氮化硅陶瓷 石墨烯 晶须 摩擦系数 磨损率 

分 类 号：TH133.33[机械工程—机械制造及自动化] TH145.1[一般工业技术—材料科学与工程]