摘要
采用冷轧复合工艺制备了用于锂离子电池封装用的层状Al-Ni双金属复合带材。针对轧制复合工艺和热处理退火工艺对Al-Ni双金属复合带材界面化合物种类、结构及其应用特性进行了研究。结果表明：合适的轧制变形量是实现Al层和Ni层复合的关键因素,在本实验中复合轧制的变形量应控制在50%-60%之间。在后续退火工艺中,Al层和Ni层界面上首先形成的是Al3Ni相,该相有利于Al层和Ni层实现牢固的冶金结合。随着退火时间的延长,随后会形成较脆性的Al3Ni2相,该相以层状形式存在两层金属中间,容易造成Al层和Ni层金属的剥离,因此通过退火工艺控制界面化合物形成的类型和结构十分重要。实验发现,在698-748 K温度范围内退火1 h的轧制复合Al-Ni双金属复合带材,具有好的抗折弯效果、稳定的焊接性能和合适的电阻值,可以作为锂电池封装材料来进行使用。
The cold roll bonding process of an Al-Ni layer composite sheet applied as a brazing solder for the welding of nickel and aluminum structures in the lithium-ion battery packaging was investigated. The effects of roll bonding and annealing treatment on the application properties and the interface compounds of Al-Ni composite sheet were also studied. The results show that the appropriate rolling reduction to bond and produce Al-Ni layer composite sheet is between 50% and 60% deformation degree. During the annealing process, the first formed Al3Ni phase in the interface of Al and Ni is beneficial to the bonding of such two metals, but the sequently formed Al3Ni2 phase results in cracks and separation of the Al-Ni layers. The roll-bonded Al-Ni layer composite sheet acquires good bending endurance, stable weldability and suitable electrical resistivity upon annealing at 698 K to 748 K for 1 h.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第5期1100-1105,共6页
Rare Metal Materials and Engineering
基金
the Shandong Province Project of Outstanding Subject Talent Group
