超重力方向调节电沉积镍箔表面形貌和力学性能

在电场方向与超重力方向相同和相反条件下电沉积制备金属镍箔.利用扫描电镜和原子力显微镜对镍箔表面形貌和粗糙度进行了表征,并测试和对比了各种重力条件下电沉积镍箔硬度和拉伸强度.结果表明,在超重力场作用下电沉积镍箔表面变得更加致密、平整,晶粒细化,粗糙度明显降低.特别是,当超重力与电场方向相反(电极C)时,镍箔表面更为平整致密.当超重力方向和电场方向相同(电极B)时,镍箔的HV硬度可达839,抗拉强度可达944MPa,性能优于电极C镍箔片,且远高于常重力条件下电沉积镍箔HV硬度的294和抗拉强度298MPa.

Surface morphology and mechanical properties of Ni foils electrodeposited under super gravity

Ni foil was electrodeposited under vertical super gravity field with same and opposite direction to electric field. Its surface morphologies and roughness were characterized by SEM and AFM. Its hardness and tensile strength under different gravities were also examined and compared. The results indicated that its surface electrodeposited under super gravity field was more compact and flatter as the grains were refined and the roughness sharply decreased, especially with the opposite direction between super gravity and electric field (Electrode C). The mechanical properties were improved by super gravity field. When the directions of super gravity and electric field were the same (Electrode B), its hardness and tensile strength were up to 839 HV and 944 MPa, respectively. The values were superior to that obtained on Electrode C and much higher than that under normal gravity condition (294 HV and 298 MPa).