Ni-Co-P/SiC纳米复合粉体化学镀机理及其电磁性能

MECHANISM AND ELECTROMAGNETIC PROPERTIES OF ELECTROLESS PLATING Ni–Co–P/SiC NANOMETER COMPOSITE POWDER

以SiC为原材料,以KNaC4H4O6为络合剂、(C2H3O2)2Pb为稳定剂,用化学镀方法,在pH9～10,65℃条件下,将纳米SiC表面处理制得Ni–Co–P/SiC纳米复合粉体。用X射线衍射及能谱分析了镀层的组成并提出了其化学镀机理。用波导法测定了Ni–Co–P/SiC复合粉体的电磁参数,用振动样品磁强计测试了样品的磁性能。结果表明:Ni–Co–P/SiC颗粒表面的Ni–Co–P镀层由非晶态Ni–Co–P及微晶态α-Co,500℃热处理后该表面镀层转化为晶态的Ni3P,Ni和β-Co。当Ni2+与Co2+的摩尔比为0.88,H2PO2–与(Ni2++Co2+)的摩尔比为0.95时,镀液有足够的还原能力和良好的稳定性,Ni–Co–P镀层有较高矫顽力和较好的电磁参数,此时SiC颗粒表面Ni和Co的质量分数分别为9.4%和11.5%。

The electroless plating method of preparing Ni–Co–P/SiC nanometer composite powder was studied. After surface pre-treatment, Ni–Co–P/SiC nanometer composite powder was obtained in a system of sodium-potassium tartrate and ammonium salt. The composition of the coating was investigated by X-ray diffraction and energy dispersive spectroscopy, and the mechanism was proposed. Via wave-guide method and vibratory sample magnetometer, the electromagnetic parameters and magnetic properties of Ni–Co–P/SiC were measur...