SYNTHESIS OF BULK NANOCRYSTALLINE NICKEL BY PULSED ELECTRODEPOSITION
SYNTHESIS OF BULK NANOCRYSTALLINE NICKEL BY PULSED ELECTRODEPOSITION
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DOI：
10.1007/bf00356715
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发表时间：
1995-11-15
影响因子：
4.5
通讯作者：
ERB, U
中科院分区：
文献类型：
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作者：
ELSHERIK, AM;ERB, U
采用方波阴极电流调制法从含糖精的瓦特型镀液中制备了晶粒尺寸在40-10 nm范围内的纳米晶镍镀层。确定了合成纳米晶体的最佳电镀条件，即脉冲开、关时间和峰值电流密度，以及镀液pH和温度。在这些电镀条件下，发现电沉积物的晶粒尺寸随着浴中糖精浓度的增加而减小。沉积物的优选取向从无糖精浴的强（200）纤维织构逐渐变为含10 gl（-1）糖精浴的（111）（200）双纤维织构。透射电子显微镜显示，电沉积层由均匀的结构和窄的粒度分布。正如预期的那样，这些沉积物被发现含有共沉积的硫和碳杂质。
Square-wave cathodic current modulation was used to produce nanocrystalline nickel electrodeposits with grain sizes in the range 40-10 nm from saccharin-containing Watts-type baths. The optimum plating conditions to synthesize nanocrystals, namely pulse on- and off-time and peak current density, as well as bath pH and temperature, were identified. At these plating conditions, the grain size of the electrodeposits was found to decrease with increasing saccharin concentration in the bath. The preferred orientation of the deposits progressively changed from a strong (200) fibre texture for a saccharin-free bath to a (111) (200) double fibre texture for a bath containing 10 gl(-1) saccharin. Transmission electron microscopy showed that the electrodeposits consist of uniform structure with narrow grain-size distribution. These deposits, as expected, were found to contain co-deposited sulphur and carbon impurities.