高性能铜铝复合排的制备及界面研究

采用固-液法浇注和铸轧工艺制备铝/铜复合材料.研究不同工艺对铜/铝复合排界面结合强度的影响,并对铜/铝复合排界面结构和复合机理进行分析.结果表明:当进行300°C×1h热处理时,所得复合排的结合强度最高,多次热循环后复合排界面结合强度有所增加.电子探针能谱扫描分析(EDS)和X射线衍射分析(XRD)表明铜/铝复合界面上生成金属间化合物Al2Cu,Al4Cu9和AlCu相,从而使得界面层硬度增大.采用该方法制备的铜/铝复合排,整体拉伸强度达98MPa,电阻率为0.021 6×10-6Ω.m.

Study on preparation and interface of high-performance Cu-Al composite row

Cu-Al composite row was prepared by solid-liquid bonding method and cast-rolling technique.Different processes affecting interfacial strength were studied.The interface structure and bonding mechanism of Cu-Al composite row were analyzed.The results show that when the heat treatment temperature is 300℃,for 1h,the interfacial bonding strength is the highest.The bonding strength increases after multiple thermal cycling.Energy Dispersive Spectroscopy(EDS) and X-ray Diffraction(XRD) analysis show that the interface diffusion layer generates the intermetallic compounds Al2Cu,AlCu and Al4Cu9 phase,which increase the interfacial hardness.Cu-Al composite row prepared by this method has excellent mechanical properties and electrical conductivity;the tensile strength reaches 98 MPa;the resistance rate is 0.0216 × 10-6 Ω·m.