摘要
以复合矿物纤维为主要增强纤维,采用一次热压成型技术,制备出不同复合矿物纤维含量的低树脂基摩擦材料,利用洛氏硬度计测量其洛氏硬度、定速式摩擦试验机测试其摩擦磨损性能,探究复合矿物纤维含量对低树脂基摩擦材料摩擦磨损性能的影响;采用扫描电子显微镜观察磨损表面的微观形貌,进行磨损机制的探讨。结果表明:复合矿物纤维能显著提高低树脂基摩擦材料的摩擦因数,且适当复合矿物纤维含量的低树脂基摩擦材料具有良好的摩擦热稳定性,但在高温试验下,过多的复合矿物纤维会使低树脂基摩擦材料出现严重的热衰退现象;随着复合矿物纤维含量的增多,洛氏硬度硬度先平稳后下降,摩擦因数呈先升后降状态,磨损率先平稳缓慢增加,后剧烈增加。SEM分析表明,在高温试验下,随着复合矿物纤维含量的升高,低树脂基摩擦材料的磨损形式逐渐从黏着磨损和磨粒磨损转化为热分解磨损、脆性脱落和磨粒磨损。
The low resin?based friction materials reinforced by compound mineral fiber were prepared by using one?step hot press molding technology,and the effect of compound mineral fiber content on tribological behaviors of the friction ma?terials was studied by using Rockwell hardness tester to measure the Rockwell hardness,and constant speed friction tester to test the friction and wear performance.The microstructure of worn surface was observed by scanning electron microscope, and wear mechanism was discussed.The results show that compound mineral fiber can significantly improve the friction co?efficient of the friction materials,and the friction materials with appropriate compound mineral fiber content have good ther?mal stability,but severe fade occurs when the composite contains too much compound mineral fiber at high test tempera?ture.Along with the increasing of compound mineral fiber,the Rockwell hardness keeps steady first and drops later,the fric?tion coefficients is increased first and decreased later,and the wear rates is increased steadily first but decreased sharply later.The result of SEM analysis shows that,along with the increasing of compound mineral fiber content,the wear type of the low resin?based friction materials gradually change from adhesive wear and abrasive wear into thermal decomposition wear and brittle spalling accompanying with abrasive wear.
出处
《润滑与密封》
CAS
CSCD
北大核心
2016年第3期15-20,共6页
Lubrication Engineering
基金
重庆市基础科学与前沿技术研究重点项目(cstc2015jcyjB0205)
重庆交通大学研究生教育创新基金项目(20140120)
关键词
复合矿物纤维
低树脂基摩擦材料
摩擦磨损
compound mineral fiber
low resin-based friction material
friction and wear
