摘要
制备一种木质素纤维增强摩擦材料,采用冲击试验机和硬度计分析其力学性能,采用摩擦磨损试验机考察其摩擦磨损性能,采用扫描电子显微镜(SEM)和X射线衍射仪分析其断面形貌及磨损表面形貌,并探讨其磨损机制。结果表明:与钢纤维相比,木质素纤维能够提高摩擦材料的抗冲击韧性和抗断裂韧性,降低摩擦材料的硬度;在摩擦过程中木质素纤维在摩擦材料表面形成一层致密的摩擦层和转移膜,使摩擦材料的摩擦因数比较稳定,且300℃高温时没有出现明显的热衰退现象,磨损量符合国家标准的范围;SEM和X射线衍射分析表明,木质素纤维与基体结合强度高,对摩擦材料增强效果显著,其在高温阶段的主要磨损机制为磨粒磨损和疲劳磨损。
A lignin fiber reinforced friction material was prepared, and its mechanical properties and tribological proper- ties were investigated by using the impact tester and hardness meter, and the friction and wear tester, respectively.The mor- phology Of the cross section and the worn surface of the friction materials were analyzed by Scanning Electron Microscope （SEM） and X-ray diffractometer, and the wear mechanism of friction materials was investigated.The results show that, com- pared with steel fiber, the lignin fiber can improve the impact toughness and fracture toughness of friction materials, and re- duce the hardness of friction materials.A layer of dense friction and transition film is formed by the lignin fiber on the sur- face of friction material during the friction process, so the lignin fiber reinforced friction material has stable friction coeffi- cient, has no significant decrease Of friction coefficient when the temperature is above 300℃, and its wear rate is within the provisions of national standard.The analysis results by SEM and X-ray diffractometer show that lignin fiber has high combining strength with matrix,and has a obvious enhancement effect to friction materials.The main wear mechanisms of lignin fiber reinforced friction material are abrasive wear and fatigue abrasion at high temperature.
作者
王呈敏
杨学锋
蔡喜光
李运玺
管永浩
张辉
WANG Chengmin WANG Xuefeng CAI Xiguang LI Yunxi GUAN Yonghao ZHANG Hui(School of Mechanical Engineering, University of Jinan, Jinan Shandong 250022, Chin)
出处
《润滑与密封》
CAS
CSCD
北大核心
2017年第8期87-91,共5页
Lubrication Engineering
基金
国家自然科学基金面上项目(51575234)
山东省自然科学基金项目(ZR2015JL018
ZR2014EL026)
山东省重点研发项目(2015GNC112009)
关键词
木质素纤维
摩擦材料
摩擦磨损性能
lignin fiber
friction materials
friction and wear properties
