Substructure development in rapidly solidified B2-type TiCo ribbons

Kyosuke Yoshimi, Minseok Sung, Sadahiro Tsurekawa, Akira Yamauchi, Ryusuke Nakamura, Shuji Hanada, Koichi Kawahara, Tadao Watanabe

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1 Citation (Scopus)


Substructure development through aging and annealing treatments was studied for rapidly solidified TiCo ribbons using TEM. In as-spun ribbons, equiaxed grain structure was developed and its crystal structure was B2-ordered immediately after melt-spinning, while a small amount of fine precipitates existed as second phase. Some grains were dislocation-free but others contained a certain amount of curved or helical dislocations and loops. The dislocation density in the ribbons annealed at 700°C for 24 h was obviously higher than those in the as-spun ribbons and the ribbons aged at 200°C for 100 h. The increase of the dislocation density in the annealed ribbons would result from the absorption of excess vacancies. Therefore, the obtained results indicated that a large amount of supersaturated thermal vacancies were retained in TiCo as-spun ribbons by the rapid solidification.

Original languageEnglish
Pages (from-to)849-852
Number of pages4
JournalMaterials Science Forum
Issue numberI
Publication statusPublished - 2005
EventPRICM 5: The Fifth Pacific Rim International Conference on Advanced Materials and Processing - Beijing, China
Duration: 2004 Nov 22004 Nov 5


  • Dislocation
  • Intermetallic compound
  • Rapid solidification
  • TiCo
  • Vacancy


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