Semi-quantitative HRTEM for partially ordered materials: Application to Al-rich TiAl alloys

Satoshi Hata, T. Nakano, K. Higuchi, Y. Nagasawa, N. Kuwano, Masaru Itakura, Y. Tomokiyo, Y. Umakoshi

研究成果: ジャーナルへの寄稿Conference article

4 引用 (Scopus)

抄録

Microstructures of long-period ordered TiAl alloys that are rich in Al were investigated by the semi-quantitative high-resolution transmission electron microscopy (HRTEM). Local ordered arrangements of Al atoms in (002) Ti-rich layers of the L 10 matrix were identified from arrangements of very bright dots in the HRTEM images after appropriate image processing. For a short-range order (SRO) state, the Al atoms form three types of ordered-clusters: square (Ti4Al), fat rhombus (Ti3Al) and lean rhombus (Ti2Al). These clusters are arranged periodically in a short-range to form microdomains of various long-period superstructures: Al5Ti3, h-Al2Ti and so on. Below or above the temperature range showing the SRO state, the Al5Ti3 or h-Al2Ti type cluster-arrangements selectively develop into their long-range order (LRO) domains. Some of the other cluster-arrangements are left between the LRO domains as anti-phase boundary structures.

元の言語英語
ページ(範囲)1721-1726
ページ数6
ジャーナルMaterials Science Forum
426-432
発行部数2
出版物ステータス出版済み - 7 18 2003
イベントThermec 2003 Processing and Manufacturing of Advanced Materials - Madrid, スペイン
継続期間: 7 7 20037 11 2003

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High resolution transmission electron microscopy
Atoms
transmission electron microscopy
high resolution
Phase boundaries
Oils and fats
Image processing
Fats
Microstructure
antiphase boundaries
fats
atoms
image processing
Temperature
microstructure
matrices
temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

これを引用

Hata, S., Nakano, T., Higuchi, K., Nagasawa, Y., Kuwano, N., Itakura, M., ... Umakoshi, Y. (2003). Semi-quantitative HRTEM for partially ordered materials: Application to Al-rich TiAl alloys. Materials Science Forum, 426-432(2), 1721-1726.

Semi-quantitative HRTEM for partially ordered materials : Application to Al-rich TiAl alloys. / Hata, Satoshi; Nakano, T.; Higuchi, K.; Nagasawa, Y.; Kuwano, N.; Itakura, Masaru; Tomokiyo, Y.; Umakoshi, Y.

:: Materials Science Forum, 巻 426-432, 番号 2, 18.07.2003, p. 1721-1726.

研究成果: ジャーナルへの寄稿Conference article

Hata, S, Nakano, T, Higuchi, K, Nagasawa, Y, Kuwano, N, Itakura, M, Tomokiyo, Y & Umakoshi, Y 2003, 'Semi-quantitative HRTEM for partially ordered materials: Application to Al-rich TiAl alloys', Materials Science Forum, 巻. 426-432, 番号 2, pp. 1721-1726.
Hata S, Nakano T, Higuchi K, Nagasawa Y, Kuwano N, Itakura M その他. Semi-quantitative HRTEM for partially ordered materials: Application to Al-rich TiAl alloys. Materials Science Forum. 2003 7 18;426-432(2):1721-1726.
Hata, Satoshi ; Nakano, T. ; Higuchi, K. ; Nagasawa, Y. ; Kuwano, N. ; Itakura, Masaru ; Tomokiyo, Y. ; Umakoshi, Y. / Semi-quantitative HRTEM for partially ordered materials : Application to Al-rich TiAl alloys. :: Materials Science Forum. 2003 ; 巻 426-432, 番号 2. pp. 1721-1726.
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abstract = "Microstructures of long-period ordered TiAl alloys that are rich in Al were investigated by the semi-quantitative high-resolution transmission electron microscopy (HRTEM). Local ordered arrangements of Al atoms in (002) Ti-rich layers of the L 10 matrix were identified from arrangements of very bright dots in the HRTEM images after appropriate image processing. For a short-range order (SRO) state, the Al atoms form three types of ordered-clusters: square (Ti4Al), fat rhombus (Ti3Al) and lean rhombus (Ti2Al). These clusters are arranged periodically in a short-range to form microdomains of various long-period superstructures: Al5Ti3, h-Al2Ti and so on. Below or above the temperature range showing the SRO state, the Al5Ti3 or h-Al2Ti type cluster-arrangements selectively develop into their long-range order (LRO) domains. Some of the other cluster-arrangements are left between the LRO domains as anti-phase boundary structures.",
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AU - Kuwano, N.

AU - Itakura, Masaru

AU - Tomokiyo, Y.

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