论文部分内容阅读
以Mn-Cu合金为前驱体合金,在酸溶液中腐蚀去合金化成功制备出孔径尺寸为纳米量级的纳米多孔铜。研究了去合金化工艺参数中的酸溶液成分、腐蚀时间及腐蚀温度对最终纳米多孔铜孔结构及Mn的选择性腐蚀程度影响。结果表明:在0.1mol/LHCl溶液中自由腐蚀去合金化后可得到孔结构均匀的纳米多孔铜;随着腐蚀时间的延长,孔结构有显著变化,腐蚀2d所得纳米多孔铜样品的孔结构呈蜂窝状,腐蚀5d所得样品的孔结构呈均匀的三维网络状结构,而后随着腐蚀时间的延长,孔壁逐渐粗化;随着腐蚀温度升高到60℃,样品中的残余Mn含量降低明显。通过调整去合金化工艺,实验所制备的纳米多孔铜孔结构呈均匀的三维网络状,孔隙率为57.7%,平均孔径尺寸约140nm。
Mn-Cu alloy as a precursor alloy, in the acid solution to the corrosion of alloying successfully prepared nano-sized pore size of nano-porous copper. The effects of acid solution composition, etching time and etching temperature on the final nano-porous copper pore structure and selective corrosion of Mn were studied. The results show that the pore structure is obviously changed after the free-corrosion de-alloying in 0.1mol / LHCl solution. The pore structure of the porous copper sample obtained by etching for 2 days shows a significant change as the etching time prolongs. The pore structure of the porous copper sample The pore structure of the honeycomb sample after 5d etching showed a uniform three-dimensional network structure, and then the pore wall gradually roughened with the extension of the etching time. With the increase of the etching temperature to 60 ℃, the residual Mn content in the sample decreased significantly . By adjusting the de-alloying process, the nano-porous copper pore structure prepared in the experiment showed a uniform three-dimensional network with a porosity of 57.7% and an average pore size of about 140 nm.