论文期刊

Enhanced anodization growth of self-organized ZrO2 nanotubes on nanostructured zirconium




作者: Lan Zhang , Jianmin Shao , Yong Han
发表/完成日期: 2010-12-01
期刊名称: Surface & Coatings Technology
期卷:
相关文章: SCF.pdf   
论文简介
To understand the effect of substrate microstructure on formation of ZrO2 nanotubes, anodic oxidizations of
commercially pure zirconium subjected to surface mechanical attrition treatment (SMATed-Zr), SMATed-Zr
annealed at 550 °C for 10 h and unSMATed-Zr in an aqueous solution containing (NH4)2SO4 and NH4F were
investigated. The SMATed-Zr and annealed SMATed-Zr exhibit nanocrystallized surface layers containing high
density of grain boundaries compared with unSMATed-Zr. The anodization results show that the formed ZrO2
nanotube layer on the SMATed-Zr is slightly thicker than that on the annealed SMATed-Zr, but thicker than
that on the unSMATed-Zr. It is indicated that nanocrystallized Zr is propitious to the growth of ZrO2
nanotubes; and grain boundaries, compared with dislocations, play the leading role in accelerating the
reaction rate during anodization, in turn enhancing the crystallinity of ZrO2 nanotubes at top-end.