电磁频率对车电极用纳米ZrB增强铝基合金性能的影响  

Effect of electromagnetic frequency on properties of aluminum matrix composites reinforced by nano ZrB for automotive electrode

作　　者：任伟[1] REN Wei(Equipment Engineering Department,Henan Technical College of Construction,Zhengzhou 454950,China)

机构地区：[1]河南建筑职业技术学院设备工程系,河南郑州454950

出　　处：《粉末冶金工业》2020年第2期73-77,共5页Powder Metallurgy Industry

摘　　要：选择6063合金作为基体材料,采用电磁场技术制备得到ZrB/6063纳米材料,探讨了颗粒微观形貌、力学特性和电磁场之间的关系。研究结果表明:在XRD图上形成了明显的铝基体与ZrB组织的衍射峰,当基体中添加ZrB颗粒后,衍射峰强度也会随之增大。当电磁场电磁频率变大后,能够使颗粒形成更加均匀的分布状态,提高了颗粒尺寸的均匀度并使平均尺寸大幅降低。当电磁场电磁频率增大后,复合材料各项力学性能指标都明显提高。电磁频率10 Hz时,材料拉伸强度358 MPa,屈服强度262 MPa,伸长率24.7%,相对于未施加电磁场制备的材料性能分别上升了38.8%、67.9%和32.8%。增加电磁场后,材料拉伸断口区域形成了更多的小尺寸韧窝,表现出明显的韧窝断裂特点。ZrB/6063 nanocomposite was prepared by electromagnetic field technology using 6063 alloy as matrix material,and the relationship between the microstructure,mechanical properties and electromagnetic field was discussed. The results show that the diffraction peaks of aluminum matrix and ZrB structure are formed on the XRD diagram,and the intensity of the diffraction peaks increases with the addition of ZrB particles.When the electromagnetic frequency of electromagnetic field increases,the particles can form a more uniform distribution state,which improves the uniformity of particle size and greatly reduces the average size.When the electromagnetic frequency of the electromagnetic field increases,the mechanical properties of the composite increase obviously.When the electromagnetic frequency is 10 Hz,the tensile strength of the material is 358 MPa,the yield strength is 262 MPa,and the elongation is 24.7%,which increases by 38.8%,67.9% and 32.8% respectively compared with the non-electromagnetic field.After increasing the electromagnetic field,more small dimples are formed in the tensile fracture area of the material,showing obvious dimple fracture characteristics.

关 键 词：铝基合金 纳米ZrB颗粒 电磁场 拉伸强度 

分 类 号：TB33[一般工业技术—材料科学与工程]