Extended antiphase boundaries in the DO3 ordered phase in a nonstoichiometric Fe3Si alloy

Syo Matsumura; Shunjiro Takeuchi; Yoshinobu Tahara; Kensuke Oki

Extended antiphase boundaries in the DO₃ ordered phase in a nonstoichiometric Fe₃Si alloy

Syo Matsumura, Shunjiro Takeuchi, Yoshinobu Tahara, Kensuke Oki

Quantum Sciences of Materials

Research output: Contribution to journal › Article › peer-review

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Abstract

High resolution transmission electron microscopy (HREM) was employed to study antiphase boundaries (APBs) with (100)/2 translation of DO₃-type order in a nonstoichiometric Fe-14.6 at%Si alloy annealed at 873 K for various durations. We observed APBs in edge-on orientation, and recognized extended regions where lattice fringes are distorted or extinguished. The width of the regions observed increases up to about 2.5 nm with the annealing time. It is concluded that APBs are wetted by partially disordered layers due to segregation of excess Fe atoms, as predicted by statistical thermodynamics of nonstoichiometric ordering alloys.

Original language	English
Pages (from-to)	310-314
Number of pages	5
Journal	Journal of Electron Microscopy
Volume	42
Issue number	5
Publication status	Published - Oct 1 1993

All Science Journal Classification (ASJC) codes

Instrumentation

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title = "Extended antiphase boundaries in the DO3 ordered phase in a nonstoichiometric Fe3Si alloy",

abstract = "High resolution transmission electron microscopy (HREM) was employed to study antiphase boundaries (APBs) with (100)/2 translation of DO3-type order in a nonstoichiometric Fe-14.6 at%Si alloy annealed at 873 K for various durations. We observed APBs in edge-on orientation, and recognized extended regions where lattice fringes are distorted or extinguished. The width of the regions observed increases up to about 2.5 nm with the annealing time. It is concluded that APBs are wetted by partially disordered layers due to segregation of excess Fe atoms, as predicted by statistical thermodynamics of nonstoichiometric ordering alloys.",

author = "Syo Matsumura and Shunjiro Takeuchi and Yoshinobu Tahara and Kensuke Oki",

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AU - Matsumura, Syo

AU - Takeuchi, Shunjiro

AU - Tahara, Yoshinobu

AU - Oki, Kensuke

PY - 1993/10/1

Y1 - 1993/10/1

N2 - High resolution transmission electron microscopy (HREM) was employed to study antiphase boundaries (APBs) with (100)/2 translation of DO3-type order in a nonstoichiometric Fe-14.6 at%Si alloy annealed at 873 K for various durations. We observed APBs in edge-on orientation, and recognized extended regions where lattice fringes are distorted or extinguished. The width of the regions observed increases up to about 2.5 nm with the annealing time. It is concluded that APBs are wetted by partially disordered layers due to segregation of excess Fe atoms, as predicted by statistical thermodynamics of nonstoichiometric ordering alloys.

AB - High resolution transmission electron microscopy (HREM) was employed to study antiphase boundaries (APBs) with (100)/2 translation of DO3-type order in a nonstoichiometric Fe-14.6 at%Si alloy annealed at 873 K for various durations. We observed APBs in edge-on orientation, and recognized extended regions where lattice fringes are distorted or extinguished. The width of the regions observed increases up to about 2.5 nm with the annealing time. It is concluded that APBs are wetted by partially disordered layers due to segregation of excess Fe atoms, as predicted by statistical thermodynamics of nonstoichiometric ordering alloys.

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ER -

Extended antiphase boundaries in the DO₃ ordered phase in a nonstoichiometric Fe₃Si alloy

Abstract

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