富勒醇在镍复合镀层中的热扩散机理

采用富勒醇成膜与电镀镍两步电沉积的方法制备了镍/富勒醇复合材料,并研究了富勒醇在复合镀层中的扩散行为.镀液组成及工艺参数为:NiSO4·7H20 250～350 g/L,NiCl230～60 g/L,H3803 30～40 g/L,十二烷基硫酸钠0.05～0.10 g/L,电流密度10 A/dm2,室温下施镀20 mi...

Diffusion mechanism of fullerenol molecules in nickel composite coating during heat treatment

A Ni/fullerenol composite coating was prepared by a two-step synthesis technique,which consists of a fullerenol film formation followed by a Ni electroplating. The coating was obtained from the plating bath consisting of NiSO4·7H2O 250-350 g/L,NiCl2 30-60 g/L,H3BO3 30-40 g/L,and lauryl sodium sulfate 0.05-0.10 g/L at a current density of 10 A/dm2 and room temperature for 1 h. The diffusion behavior of fullerenol molecules within polycrystalline Ni metal materials was investigated. The electrodeposited fullerenol was characterized by a molecular formula of C60O(OH) 12,as evident from elemental analysis(EA) result. Glow discharge mass spectrometry(GDS) technique,X-ray diffraction(XRD) and Raman spectroscopy were employed for researching the diffusion mechanism of fullerenol molecule. The diffusion activation energy for fullerenol molecules within the composite coating is 33.11 kJ/(mol·K) in the temperature range of 250-600 °C. A mechanism involving hexagonal absorption on Ni planes(111) was suggested.