TY - JOUR
T1 - HRTEM image contrast and atomistic microstructures of long-period ordered Al-rich TiAl alloys
AU - Hata, Satoshi
AU - Higuchi, Kiyoshi
AU - Mitate, Toshitsugu
AU - Itakura, Masaru
AU - Tomokiyo, Yoshitsugu
AU - Kuwano, Noriyuki
AU - Nakano, Takayoshi
AU - Nagasawa, Yosuke
AU - Umakoshi, Yukichi
N1 - Funding Information:
This work was partly carried out at the Strategic Research Base ‘Handai Frontier Research Center’ supported by the Japanese Government’s Special Coordination Fund for Promoting Science and Technology. This work was partly supported by the Kyushu University High Voltage Electron Microscopy Program for Nano-Materials Development of the MEXT Nanotechnology Researchers Network and also by ‘Priority Assistance of the Formation of Worldwide Renowned Centers of Research – The 21st Century COE Program (Project: Center of Excellence for Advanced Structural and Functional Materials Design)’ from the Ministry of Education, Culture, Sports, Science and Technology of Japan. T.N. would like to thank Iketani Science and Technology Foundation for financial support.
PY - 2004
Y1 - 2004
N2 - Long-period superstructures formed in off-stoichiometric L1 0-TiAl alloys were investigated by high-resolution transmission electron microscopy (HRTEM). The HRTEM analysis combined with multislice simulation and image processing was carried out to clarify atomistic microstructures of Al5Ti3 and h-Al2Ti ordered states and a short-range ordered (SRO) state in Ti-62.5 at.% Al alloys. Aluminium atoms in the (002) Ti layers form square-, lean rhombus- and fat rhombus-type ordered clusters in the SRO state. The ordered clusters are in contact with each other and form microdomains of various long-period superstructures. The ordered clusters are tiled periodically in a long range to form Al5Ti3 or h-Al2Ti domains and characteristic antiphase boundary structures.
AB - Long-period superstructures formed in off-stoichiometric L1 0-TiAl alloys were investigated by high-resolution transmission electron microscopy (HRTEM). The HRTEM analysis combined with multislice simulation and image processing was carried out to clarify atomistic microstructures of Al5Ti3 and h-Al2Ti ordered states and a short-range ordered (SRO) state in Ti-62.5 at.% Al alloys. Aluminium atoms in the (002) Ti layers form square-, lean rhombus- and fat rhombus-type ordered clusters in the SRO state. The ordered clusters are in contact with each other and form microdomains of various long-period superstructures. The ordered clusters are tiled periodically in a long range to form Al5Ti3 or h-Al2Ti domains and characteristic antiphase boundary structures.
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U2 - 10.1093/jmicro/53.1.1
DO - 10.1093/jmicro/53.1.1
M3 - Article
C2 - 15077893
AN - SCOPUS:1642335743
SN - 0022-0744
VL - 53
SP - 1
EP - 9
JO - Journal of Electron Microscopy
JF - Journal of Electron Microscopy
IS - 1
ER -