具有室温超塑延展性的纳米晶体铜

卢柯等人用电沉积法合成的高纯度、高致密度的纳米晶体铜的体材可以在室温经过冷轧延伸到５０倍以上而不出现应变硬化效应、力学性能测试与微结构研究表明，这种超塑延展性来源于晶界主导的塑性形变机制，而不是晶格位错机制。同时这种室温超塑延展性的纳米晶体铜材料具有广阔的工业应用前景。

NANOCRYSTALLINE COPPER WITH A SUPERPLASTIC EXTENSIBILITY AT ROOM TEMPERATURE

Bulk nanocrystalline pure copper of high purity and high density,has been synthesized by electrodeposition and rolled to 50 times its original length without any strain hardening effect at room temperature.Mechanical tests and microstructure analysis indicate that the superplastic extensibility originates from a deformation mechanism dominated by grain boundary activities,other than lattice dislocation.These nanocrystalline metals will be very useful in modern industry.