Scanning probe microscopic observation of a surface precipitation of Mg-6 mass%Al alloy

Moritaka Hida, Koichi Imada, Akira Sakakibara, Yoshito Takemoto

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Surface and interior precipitations of Mg-6 mass%Al alloy were morphologically studied by SPM observation with AFM and KFM modes, TEM and XRD methods. The hardness increment due to the precipitation was negligibly small. According to AFM contrast the precipitates on the surface were identified as droplet-like particles (1∼4 μ4); on the other hand the ones formed in the alloy as needle-like (∼1 μm). It was confirmed by XRD that both types of the precipitates had γ-structure (Al12Mg17), and the peak height of the surface precipitates was about 3 times as high as that of the interior ones. The droplet-like precipitates projecting from the surface had a higher KFM electric potential than that of the matrix solid solution, however the precipitates embedded in either the surface layer or the matrix had a lower KFM electric potential.

Original languageEnglish
Pages (from-to)126-130
Number of pages5
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Issue number3
Publication statusPublished - Mar 2002


  • Al-Mg alloy
  • Atomic force microscope
  • Kelvin force microscope
  • Surface precipitation

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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