Nanostructure of surface formed by vacancy clustering in FeAl

Kyosuke Yoshimi, Tomohide Haraguchi, Tomohisa Ogawa, Takayuki Kobayashi, Min Seok Sung, Shuji Hanada

研究成果: Conference article査読


In B2-type FeAl, supersaturated vacancies retained upon rapidly quenching are absorbed near surface during an aging treatment, being agglomerated into nano- to meso-clusters through the absorption process. Eventually, surface morphology is self-patterned in nano-order by the vacancy clustering. If FeAl was not quenched from high temperature or plastic strain remained near surface, the surface self-patterning never occurs, indicating that the change in surface morphology is caused by the clustering of supersaturated vacancies. The clusters have specific shape with cluster surfaces faceted toward {100} planes. Thus, the shape of the clusters formed near surface is controllable by changing surface orientation. Vacancy cluster size and its distribution density can be also controlled by varying the concentration of supersaturated vacancies and/or the clustering condition. These indicate that the vacancy clustering is a unique process to efficiently pattern the surfaces of metals, alloys and intermetallics in nano-scale.

ジャーナルMaterials Research Society Symposium - Proceedings
出版ステータスPublished - 2003 12月 1
イベントSelf-Assembled Nanostructured Materials - San Francisco, CA, United States
継続期間: 2003 4月 222003 4月 25

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学


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