Fracture of anodic oxide formed on aluminium in sulphuric acid

Pore structure, barrier layer topography and matrix alumina structure of porous anodic alumina film

“…Extensive TEM observations show that carbon tubes grown in PAAF with aluminum substrate have the same round feature as that in PAAF without aluminum substrate. This result might indicate that the cracking of the fi lms on the aluminum substrate occurred through the cell boundaries and did not pass through the pores [16], so the obtained tubes remained round, rather than another complex shape, if the crack occurred through the pores. The reported study was carried out on fi lm anodized in sulfuric acid solution and the fracture was realized by 180° sharp bending [16].…”

“…This result might indicate that the cracking of the fi lms on the aluminum substrate occurred through the cell boundaries and did not pass through the pores [16], so the obtained tubes remained round, rather than another complex shape, if the crack occurred through the pores. The reported study was carried out on fi lm anodized in sulfuric acid solution and the fracture was realized by 180° sharp bending [16]. In our case, the fi lm was obtained by anodizing in oxalic acid solu- tion and the fracture was induced by heat expansion, but it may also occur through the cell boundaries.…”

Porous Aluminum Oxide Formed by Anodizing in Various Electrolyte Species

“…2b) [1-3, [20][21][22][23]. Porous oxide film is also known as anodic aluminum oxide (AAO), porous anodic alumina (PAA), anodic porous alumina, porous anodic aluminum oxide (PAOX), etc., and these names correspond to the same "porous oxide film" fabricated by anodizing in acidic solutions.…”

TiO2‐Nanoröhren: Synthese und Anwendungen

“…Selbst bei Al wurde unter spezifischen Bedingungen ein selektives ¾tzen der Zellgrenzen beobachtet. [167][168][169][170] Die Wirkung der Wasserkonzentration wurde kürzlich auch bei der Bildung reiner TiO 2 -Nanoröhren untersucht, und tatsächlich erhält man bei extrem geringen H 2 O-Gehalten in einem nichtwässrigen Elektrolyten eine poröse Morphologie. [171] Die Tatsache, dass die Anodisierungsspannung eben- [124,126,172] Für die Selbstordnungseigenschaften von porösem Aluminiumoxid wurden sehr aufwändige theoretische Studien durchgeführt.…”