Yu Guoyan, Ma Jingdong, Li Jun, Wu Jingquan, Yu Jiang, Wang Xianzhang
School of Mechanical and Power Engineering, Guangdong Ocean University, Zhanjiang 524088, China.
Guangdong Provincial Marine Equipment and Manufacturing Engineering Technology Research Center, Zhanjiang 524088, China.
Polymers (Basel). 2022 May 27;14(11):2167. doi: 10.3390/polym14112167.
Polymeric matrix composites are important to the advancement of industries such as the automobile and medicine industries. In this study, the silicon carbide (SiC) particle-reinforced polyamide12 (PA12) matrix composites were fabricated by selective laser sintering system as well as the pure PA12. The surface topographies, mechanical, and tribological properties were further examined. The results indicated that the friction and wear resistance of the composite were improved compared with the PA12 matrix. The compressive strength increased about 8.5%, shore D hardness increased about 6%. The friction coefficient decreased about 10%, the specific wear rate decreased 20% after adding silicon carbide 10% weight to PA12. The wear mechanisms were also discussed. The deformed asperities on the worn surface can withstand more tangential load, and therefore resulted in lower specific wear rate. It was found that the content of SiC particles on the surface were reduced after friction tests. According to the analysis of SEM, EDS, and FTIR results, the wear mechanisms were considered to be the abrasive and fatigue mode. This type of PA12 matrix composite might be a promising potential in marine and energy applications.
聚合物基复合材料对汽车和医药等行业的发展至关重要。在本研究中，采用选择性激光烧结系统制备了碳化硅（SiC）颗粒增强聚酰胺12（PA12）基复合材料以及纯PA12。进一步研究了它们的表面形貌、力学性能和摩擦学性能。结果表明，与PA12基体相比，复合材料的摩擦磨损性能得到了改善。抗压强度提高了约8.5%，邵氏D硬度提高了约6%。在PA12中添加10%重量的碳化硅后，摩擦系数降低了约10%，比磨损率降低了20%。还讨论了磨损机制。磨损表面上变形的微凸体能够承受更大的切向载荷，因此导致比磨损率降低。摩擦试验后发现表面SiC颗粒的含量减少。根据扫描电子显微镜（SEM）、能谱仪（EDS）和傅里叶变换红外光谱（FTIR）结果分析，磨损机制被认为是磨料磨损和疲劳磨损模式。这种PA12基复合材料在海洋和能源应用中可能具有广阔的潜在应用前景。
