Sharifyan Aref, Ranjbaran Nima, Nasiri Abdollah
Department of mechanical engineering, Razi University, Kermanshah, Iran.
Heliyon. 2024 Jul 26;10(15):e35259. doi: 10.1016/j.heliyon.2024.e35259. eCollection 2024 Aug 15.
This research investigates the production of Cu-SiC composites by using gas pressure infiltration method and the production of Al/Cu-SiC composite by using the cold rolling method. The layers were bonded by three rolling reductions of 40 %, 50 %, and 60 %. The microstructures of composites before and after roll bonding were discussed based on SEM and EBSD images. Less agglomeration of whiskers was seen after higher rolling reductions which indicates better distribution of reinforcement in copper. In addition, no decomposition and reaction were observed in Cu-SiC. The effect of rolling reductions on hardness, wear behavior, and tensile properties was also investigated. Hardness, yield, and ultimate strengths increased at higher rolling reductions. The yield and ultimate strengths increased from 118 MPa to 227 MPa after a 40 % rolling reduction to 150 MPa and 263 MPa after a 60 % rolling reduction. The measured friction coefficient and mass loss showed better wear resistance of composites at higher rolling reductions because the layers became hardened. The mass loss decreases from 6.46 mg after a 40 % rolling reduction to 5.42 mg after a 60 % rolling reduction. Worn surfaces based on SEM images showed shallower grooves and less remaining debris.
本研究采用气压浸渗法研究了铜-碳化硅复合材料的制备，并采用冷轧法研究了铝/铜-碳化硅复合材料的制备。通过40%、50%和60%的三次轧制压下率进行层间结合。基于扫描电子显微镜（SEM）和电子背散射衍射（EBSD）图像讨论了轧制复合前后复合材料的微观结构。在较高的轧制压下率后，晶须的团聚较少，这表明增强相在铜中的分布更好。此外，在铜-碳化硅中未观察到分解和反应。还研究了轧制压下率对硬度、磨损行为和拉伸性能的影响。在较高的轧制压下率下，硬度、屈服强度和抗拉强度增加。轧制压下率为40%后，屈服强度和抗拉强度从118MPa增加到227MPa；轧制压下率为60%后，屈服强度和抗拉强度增加到150MPa和263MPa。测量的摩擦系数和质量损失表明，在较高的轧制压下率下，复合材料具有更好的耐磨性，因为层变得硬化。质量损失从轧制压下率为40%时的6.46mg降低到轧制压下率为60%时的5.42mg。基于扫描电子显微镜图像的磨损表面显示出更浅的沟槽和更少的残留碎屑。
