Transmission electron microscopic observation of layered double hydroxide films formed on aluminum alloys prepared by steam coating process

Naoki Takata, Hongmei Li, Makoto Kobashi, Yuta Shimada, Ai Serizawa, Takahiro Ishizaki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Synopsis: Microstructures and crystallographic features of layered double hydroxide (LDH) particles and the LDH film formed on the aluminum alloy sheet (alloy 7075) using the steam coating process were examined by transmission electron microscopy (TEM). The LDH powder particles exhibited a hexagonal-disc-shape morphology. Their disc plane and side planes were parallel to a basal plane and prism planes of the LDH hexagonal crystal, respectively. A cross-sectional thin TEM sample was prepared from the interface between the LDH film and the Al alloy substrate using a focused ion beam combined with pick-up technique. TEM observations revealed that the LDH film formed on the Al alloy exhibited a dual-layer structure, which consists of a continuous Zn-rich amorphous layer (including numerous nano-particles with fcc structure) on the Al substrate side and a LDH layer composed of a number of disc-shaped LDH particles.

Original languageEnglish
Pages (from-to)177-182
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume105
Issue number2
DOIs
Publication statusPublished - 2019 Feb 1

Keywords

  • Aluminum alloys
  • Hydroxide
  • Steam coating
  • Surface treatment
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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