多种填料改性PTFE三层复合材料的性能研究

发布时间：2018-06-14 15:56

本文选题：PTFE + 摩擦　；参考：《浙江大学》2016年硕士论文

【摘要】：随着三层复合材料在机械工程,汽车制造等各领域的广泛应用,客户们对其要求也更为苛刻,既要其摩擦学性能不断提升,又要求进一步提高复合材料表层的结合强度。在这一背景下,本课题展开了对PTFE基三层复合自润滑材料的研究,以常用的无机材料石墨,二硫化钼以及有机材料聚酰亚胺和聚苯酯作为填料,对填料的单独复合或协同复合作用进行研究探讨。在研究过程中,我们首先运用成熟工业化的三层复合材料生产设备与技术工艺,制备出合格的摩擦磨损实验样品,利用端面摩擦磨损试验机,模拟实际工况中干摩擦、预浸油的条件进行了摩擦磨损实验,利用超声波冲击仪,对试样的表层结构进行结合强度实验,采用光学显微镜和扫描电镜对试样的表面特性进行分析,结合试验结果探讨了不同配方材料的摩擦磨损和表层材料结合度机理,得出了以下几点结论：1、无机填料的加入能够明显改善材料的摩擦性能,但是会降低材料的耐磨性能和结合强度；2、有机填料的加入能够明显提高材料的耐磨性能和结合强度,对材料的摩擦性能也有一定的积极作用；聚酰亚胺对材料的结合强度提高更明显；3、多组分填料共同添加,更利于摩擦过程中转移膜的形成和稳定,大幅的增强复合材料的摩擦磨损性能,各种填料间相互耦合协同作用,可以充分的发挥各填料自身耐磨减磨的特性,增强材料的结合强度。
[Abstract]:With the extensive application of three-layer composite materials in mechanical engineering, automobile manufacturing and other fields, customers are more demanding to its tribological properties, but also to further improve the bonding strength of the composite surface layer. In this context, the study of PTFE based three-layer composite self-lubricating materials was carried out. The inorganic materials graphite, molybdenum disulfide, organic materials polyimide and polyphenyl ester were used as fillers. The single or synergistic composite effects of fillers were studied. In the course of the research, we first use the mature and industrialized three-layer composite material production equipment and technology to prepare the qualified friction and wear test samples, and use the end friction and wear tester to simulate the dry friction in the actual working conditions. The friction and wear experiments were carried out on the condition of prepreg oil, the surface structure of the sample was tested by ultrasonic impact instrument, and the surface characteristics of the sample were analyzed by optical microscope and scanning electron microscope. In combination with the experimental results, the friction and wear mechanism of different formulations and the bonding degree of surface materials are discussed. The following conclusions are drawn: 1: 1, the addition of inorganic filler can obviously improve the tribological properties of the materials. However, the wear resistance and bonding strength of the material will be reduced. The addition of organic filler can obviously improve the wear resistance and bonding strength of the material, and it will also play a positive role in the friction property of the material. The bonding strength of polyimide to the material is increased more obviously, and the multicomponent filler is added together, which is more conducive to the formation and stability of the transfer film during the friction process, and greatly enhances the friction and wear properties of the composite. The coupling and synergetic effects of various fillers can give full play to the wear-resisting and anti-wear characteristics of the fillers and enhance the bonding strength of the materials.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TB33

【相似文献】