The nucleation mechanisms of cobalt from sulfate solutions were studied by utilizing the electrochemical technique, chronoamperometry. It was found that the recorded current-time transients introduced from 1.0 mol/L C...The nucleation mechanisms of cobalt from sulfate solutions were studied by utilizing the electrochemical technique, chronoamperometry. It was found that the recorded current-time transients introduced from 1.0 mol/L CoSO4 solution were complexes with unusual shapes. All characteristic features were identified as separate process. The instantaneous or progressive nucleation with 2D or 3D growth exists during the cobalt deposition, depending on the applied potentials.展开更多
利用与时间有关的瞬态形核理论计算了不同Nd含量的Al Fe V Si Nd合金中α Al相的形核率、形核孕育期与过冷度的关系 ,并计算了α Al形成非晶的临界冷却速率。结果表明 ,随Nd含量增加 ,合金的液相线温度提高 ,α Al形核孕育期延长 ,形核...利用与时间有关的瞬态形核理论计算了不同Nd含量的Al Fe V Si Nd合金中α Al相的形核率、形核孕育期与过冷度的关系 ,并计算了α Al形成非晶的临界冷却速率。结果表明 ,随Nd含量增加 ,合金的液相线温度提高 ,α Al形核孕育期延长 ,形核过冷度增加 ,形核率降低 ,临界冷却速率降低 ,从而增大其非晶的形成倾向。展开更多
文摘The nucleation mechanisms of cobalt from sulfate solutions were studied by utilizing the electrochemical technique, chronoamperometry. It was found that the recorded current-time transients introduced from 1.0 mol/L CoSO4 solution were complexes with unusual shapes. All characteristic features were identified as separate process. The instantaneous or progressive nucleation with 2D or 3D growth exists during the cobalt deposition, depending on the applied potentials.
