稻壳基陶瓷颗粒(RHC)是实现稻壳综合利用的有效途径之一,采用常规化学镀方法将稻壳基陶瓷颗粒进行化学镀镍,可扩展其应用范围.利用单因素和正交实验,确定了镀镍的最佳工艺参数,将表面镀镍稻壳基陶瓷颗粒添加入铝基材料中,研究对复合材料的抗磨减摩特性的影响.利用X射线衍射仪和高分辨率透射电镜等分析手段对镀镍稻壳基陶瓷颗粒进行了表面分析.结果表明,稻壳基陶瓷颗粒表面镀镍的最佳工艺为,温度为60℃、时间为180 min、镀液pH值为11以及次亚磷酸钠浓度为180 g/L.稻壳基陶瓷颗粒表面分布着大量直径约为40～50 nm之间的镍纳米颗粒;镀镍的稻壳基陶瓷颗粒可明显的改善铝基材料的抗磨减摩特性.
Rice husk ceramic (RHC) particles can be prepared by carbonization process of rice husk power,which is an important method to comprehensive utilization of rice husk.Surface metallization method is a very impor tant technology to expand the scope of application of rice husk ceramic particles.In this paper,electroless plating method was conducted to complete surface metallization of rice husk ceramic particles.Single factor and or thogonal experiments methods were utilized to optimize technological parameters.Effect of Ni-RHC on the tribological performance of aluminum based composite was investigated using a micro-tribometer.The surface morphology and composition of Ni RHC particles were analyzed by X-ray diffraction spectroscopy (XRD) and high resolution transmission electron microscopy (HRTEM).Results showed that the optimized technological parameters of temperature,plating time,pH and concentration of sodium hypophosphite were 60 ℃,180 min,11 and 180 g/L,respectively.The diameter of Ni particles was approximate 40～50 nm,which dispersed on the surface of RHC particles.The Ni based RHC particles can obviously promote the wear resistance and friction re duction properties of aluminum based composites.
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