[1]周红成,卞达,刘雅玄,等.改性纳米氮化硅增强聚四氟乙烯复合涂层摩擦学行为研究[J].中国材料进展,2022,41(07):578-583.[doi:10.7502/j.issn.1674-3962.202101003]
　ZHOU Hongcheng,BIAN Da,LIU Yaxuan,et al.Tribological Behavior Investigation of Polytetrafluoroethylene Composite Coating Reinforced with Modified Nano-Silicon Nitride[J].MATERIALS CHINA,2022,41(07):578-583.[doi:10.7502/j.issn.1674-3962.202101003]
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改性纳米氮化硅增强聚四氟乙烯复合涂层摩擦学行为研究()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
41
期数:
2022年第07期
页码:
578-583
栏目:
出版日期:
2022-07-30

文章信息/Info

Title:
Tribological Behavior Investigation of Polytetrafluoroethylene Composite Coating Reinforced with Modified Nano-Silicon Nitride
文章编号:
1674-3962(2022)07-0578-06
作者:
周红成; 卞达; 刘雅玄; 郭永信; 赵永武
（江南大学机械工程学院，江苏 无锡 214122）
Author(s):
ZHOU Hongcheng;  BIAN Da;  LIU Yaxuan;  GUO Yongxin;  ZHAO Yongwu
(School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China)
关键词:
氮化硅; 聚四氟乙烯; 摩擦系数; 磨损率
Keywords:
silicon nitride;  polytetrafluoroethylene;  friction coefficient;  wear rate
分类号:
TQ325.4;TB383
DOI:
10.7502/j.issn.1674-3962.202101003
文献标志码:
A
摘要:
聚四氟乙烯（PTFE）在减摩材料领域应用广泛，但其较差的耐磨性限制了其应用。纳米材料改性是改善PTFE耐磨性的一种有效方法，而氮化硅（Si3N4）的强度高、摩擦系数低，能够与PTFE实现功能互补。以PTFE和硅烷偶联剂KH-570改性的Si3N4为填料、聚酰胺酰亚胺（PAI）为粘结剂，采用喷涂固化的方法制备了PTFE/Si3N4复合涂层，并对该涂层的摩擦学性能展开了研究。利用扫描电子显微镜（SEM）和傅里叶变换红外光谱（FT-IR）对改性前后的Si3N4纳米颗粒进行表征；利用显微硬度测试仪和摩擦磨损试验机对PTFE/Si3N4复合涂层的综合性能进行表征。研究结果表明：KH-570成功接枝到了Si3N4纳米颗粒的表面，接枝后Si3N4纳米颗粒的表面更加粗糙，有利于其均匀分散；Si3N4纳米颗粒可以改善PTFE/Si3N4复合涂层的硬度和摩擦学性能。当改性Si3N4纳米颗粒的质量分数为1%时，复合涂层的硬度最高，为11.1HV，摩擦系数和磨损率最低，分别为0.0755和3.78×10-3 m3·N-1·m-1，磨损方式为磨粒磨损。当加入过多的改性Si3N4纳米颗粒时，其会出现团聚，复合涂层的摩擦磨损性能下降。
Abstract:
Polytetrafluoroethylene (PTFE) is widely used in the field of antifriction materials, but its poor wear resistance limits its application. Nanomaterial modification is an effective method to improve the wear resistance of PTFE. Silicon nitride (Si3N4) has high strength and low-friction-coefficient properties, which can overcome the poor wear resistance of PTFE. With modified Si3N4 and PTFE as raw materials and polyamideimide (PAI) as binder, the PTFE/Si3N4 composite coating is prepared by spraying-curing method, and the tribological properties of the coating are investigated. The structure of Si3N4 nanoparticles before and after modification is characterized using scanning electron microscope (SEM) and fourier transform infrared spectroscopy (FT-IR). In addition, the hardness and tribological behavior of the coating are also studied by microhardness tester and friction and wear tester. The results show that KH-570 has been successfully grafted on the surface of Si3N4 nanoparticles, and the surface of modified Si3N4 nanoparticles becomes rougher, which is benefit for the dispersion of Si3N4 nanoparticles. Besides, Si3N4 nanoparticles can improve the hardness and tribological properties of the PTFE composite coating. When the mass fraction of modified Si3N4 nanoparticles is 1%, the coating achieves the highest hardness (11.1HV) among the samples. And the friction coefficient and wear rate are 0.0755 and 3.78×10-3 m3·N-1·m-1 respectively, which is the lowest friction coefficient and wear rate among the samples. At this time, the wear mechanism of the coating is mainly abrasive wear. However, when too much modified Si3N4 nanoparticles is added, the serious agglomeration occurs, which will reduce the tribological properties of the coating.

备注/Memo

备注/Memo:
收稿日期：2021-01-08 修回日期：2021-03-28 基金项目：国家自然科学基金资助项目（51675232）；江苏省青年自然科学基金资助项目（BK20190611）第一作者：周红成，男，1994年生，硕士研究生通讯作者：卞达，男，1990年生，副教授， Email：biand@jiangnan.edu.cn 赵永武，男，1962年生，教授，博士生导师， Email：zhaoyw@jiangnan.edu.cn
更新日期/Last Update: 2022-06-29