Journal ArticleDOI
Structural Features of Oxide Coatings on Aluminum
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In this paper, the structural features of the porous type of anodic oxide coating applied to aluminum have been investigated with the electron microscope, and formulas were given for calculating the cell size and pore volume of these coatings.Abstract:
The structural features of the porous type of anodic oxide coating applied to aluminum have been investigated with the electron microscope. These coatings consist of close‐packed cells of oxide, predominately hexagonal in shape, each of which contains a single pore. Pore size is a function of the electrolyte used and is independent of forming voltage. Wall thickness and barrier thickness are primarily a function of forming voltage and are affected to a minor degree by the electrolyte type. Pertinent dimensions of anodic coatings formed in sulfuric acid, oxalic acid, chromic acid, and phosphoric acid electrolytes are presented, and formulas are given for calculating the cell size and pore volume of these coatings.read more
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Journal ArticleDOI
Preparation and Characterization of Anodic Aluminum Oxide Films Exhibiting Microporosity
TL;DR: In this paper, anodic alumina materials exhibiting regular pore structure, microporosity, and extensive surface areas were prepared and characterized, and the effects of current density, anodization time, and hydrothermal treatment on pore structures were investigated.
Journal ArticleDOI
Interface evolution during electrochemical oxidation-dissolution
TL;DR: In this article, the surface image using AFM showed randomly oriented grains with lateral feature size ∼280 nm at early stage (30 s) of oxidation-dissolution (OD), as farther dissolution of alumina (90 s) progressed, oriented rectangular grains were observed with lateral features size ∼400 nm, indicating a disordered to ordered transition at the surface.
Pattern transfer from nanoparticle arrays
TL;DR: In this paper, the authors demonstrate two different kinds of pattern transfer: positive (dots) and negative (antidots) to make dots, etch the substrate between the particles with a directional CF4-based reactive ion etch (RIE).
Journal ArticleDOI
Study on Hardness and Corrosion Resistance of Magnesium by Anodizing and Sealing Treatment With Nano-diamond Powder
Soo Young Kang,Dae Won Lee +1 more
TL;DR: In this paper, anodizing and sealing with nano-diamond powder was conducted to increase surface ability of hardness and corrosion of magnesium alloy, in order to increase the surface morphology of the magnesium oxide layer.
Journal ArticleDOI
Characteristics and fabrication of nanohole array on InP semiconductor substrate using nanoporous alumina
TL;DR: The ICP-RIE technique using nanoporous alumina mask can be used as a prospective method in the fabrication of nanostructure materials for increasing the light output from semiconductor light emitting devices.
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