Morphology and composition of nickel–boron nanolayer coating on boron carbide particles
作者： Hongying Dong , Xiaojing Zhu , Kathy Lu
DOI: 10.1007/S10853-008-2615-0
关键词:
摘要: This work is focused on electroless coating of Ni–B nanolayer B4C particle surfaces. The particles used are approximately 2 μm in average size. Effects activation agent PdCl2, complexing C2H8N2, and reducing NaBH4 addition rate studied. solids loading 0.625 g/L the concentration Ni2+ ions 0.004 mol/L solution. Scanning electron microscopy (SEM) shows that when B4C:Pd2+ molar ratio 1:0.005, a with smallest nodule size covers Complexing C2H8N2 decreases ion release rate. Ni:C2H8N2 1:6 preferred amount for achieving continuous nanolayer. formation also strongly dependent reduced. Slow reduction leads to increased Ni content When above three factors combined at optimal values process, well-defined obtained. SEM cross section analysis completely less than 55 nm thickness.
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