【摘要】 采用电脉冲空化成功制备出超细镍磷合金粉体材料。研究了脉冲能量、反应温度和电极间距等工艺因素对镍磷合金粉体尺寸、形貌及收得率的影响。结果表明:镍磷合金粉体粒径可控制在80~500 nm范围内。反应初期,反应形核受脉冲能量(电压和脉冲次数)的控制,镍磷合金粉体颗粒数随脉冲放电能量的增大而增加;随反应时间的延长,脉冲空化导致镍磷合金粉体的反应被激活,溶液中镍磷粉体可自发形核、生长,直至反应完成。镍磷合金粉体颗粒尺寸受形核及长大过程的共同影响。通常,随脉冲电压和脉冲次数的增加、电极间距的减小、反应温度的降低和反应时间的缩短而非线性减小。更多还原

【Abstract】 The ultrafine Ni-P alloy powder has been prepared by electrospark cavitation technique.The Effect of sparking energy,reaction temperature and electrode distance on the powder size,shape and yield was investigated.The experimental results indicate that Ni-P alloy powder size could be controlled in the range between 80 and 500 nm.In the first stage,the nucleation of Ni-P powder is mainly determined by sparking energy including the sparking voltage and sparking number and the number of Ni-P powder increases with increasing sparking energy.With increasing the reaction time,Ni-P alloy reduction reaction is activated by electrospark cavitation,and the Ni-P alloy powder in solution can nucleate and grow spontaneously.The powder size of the Ni-P alloy was nonlinearly decreased with increasing sparking voltage and sparking numbers,and with decreasing electrode distance,reaction time and temperature.更多还原