高比表面积纳米多孔Cu涂层的制备

PREPARATION OF NANOPOROUS Cu COATINGS WITH HIGH SPECIFIC SURFACE AREA

采用激光加工在中碳钢基体表面制备了成形良好、稀释率低、组织细密的Mn-Cu合金涂层.对合金涂层进行了电解腐蚀处理,涂层中的Mn原子被电解液溶解,Cu原子经扩散、团聚,生长并形成了纳米多孔Cu涂层.涂层的孔洞尺寸为30- 50 nm,具有高比表面积.Mn—Cu合金涂层的初始成分对纳米多孔Cu涂层的微观形貌有较大的影响.

Mn Cu alloy coatings with fine shape, low dilute ratio and refined microstructure were fabricated on medium carbon steel substrate by means of laser processing, and then treated by electrochemical etching to selectively dissolve Mn atoms in the coatings. Nanoporous Cu coatings with high specific surface area were finally achieved. The sizes of the pores in the etched coatings are mainly ranging from 30 to 50 nm, and the initial composition of coatings has a great effect on the morphology of the nanoporous Cu coatings.