Structural properties of β-FeSi
            2 bulk crystal grown by horizontal gradient freeze method

H. Kakemoto; Y. Tsai; A. C. Beye; H. Katsumata; S. Sakuragi; Y. Makita; A. Obara; Naoto Kobayashi; H. Shibata; S. Uekusa; T. Tsukamoto; T. Tsunoda; Y. Imai

Structural properties of β-FeSi ₂ bulk crystal grown by horizontal gradient freeze method

H. Kakemoto^*, Y. Tsai, A. C. Beye, H. Katsumata, S. Sakuragi, Y. Makita, A. Obara, Naoto Kobayashi, H. Shibata, S. Uekusa, T. Tsukamoto, T. Tsunoda, Y. Imai

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

9 Citations (Scopus)

Abstract

We report on the synthesis of β-FeSi ₂ bulk materials using Horizontal Gradient Freeze (HGF) method. Chunk and powder FeSi ₂ or high-purity Fe (4N) and Si (9N) were used as starting materials. Three values (1:2, 2:5 and 1:3) of the Fe:Si ratio were selected in the very narrow α and β ranges of the equilibrium phase diagram. Samples were melted between 1300°C and 1500°C in high purity graphite crucibles covered with boron nitride. After cooling, the samples were kept at 800°C and 900°C during 66 to 100 hours, leading to transformation from α to β phase. Cooling rate and annealing time were taken as the two main parameters to optimize the growth conditions. Principal structural characterization was made by X-ray diffraction (XRD). Correlation with stoichiometry was achieved using the results of Rutherford Backscattering Spectroscopy (RBS) and Electron Probe X-Ray Micro Analysis (EPXMA). The samples obtained from 1:2 ratio exhibited mainly β phase while the 2:5 ratio specimens revealed almost α phase structure. The samples prepared with 1:3 ratio was found as a mixture of α and β phases under Si-rich conditions.

Original language	English
Title of host publication	Materials Research Society Symposium - Proceedings
Publisher	Materials Research Society
Pages	331-336
Number of pages	6
Volume	402
Publication status	Published - 1996
Externally published	Yes
Event	Proceedings of the 1995 MRS Fall Symposium - Boston, MA, USA Duration: 1995 Nov 27 → 1995 Nov 30

Other

Other	Proceedings of the 1995 MRS Fall Symposium
City	Boston, MA, USA
Period	95/11/27 → 95/11/30

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

Cite this

Kakemoto, H., Tsai, Y., Beye, A. C., Katsumata, H., Sakuragi, S., Makita, Y., Obara, A., Kobayashi, N., Shibata, H., Uekusa, S., Tsukamoto, T., Tsunoda, T., & Imai, Y. (1996). Structural properties of β-FeSi ₂ bulk crystal grown by horizontal gradient freeze method In Materials Research Society Symposium - Proceedings (Vol. 402, pp. 331-336). Materials Research Society.

Kakemoto, H, Tsai, Y, Beye, AC, Katsumata, H, Sakuragi, S, Makita, Y, Obara, A, Kobayashi, N, Shibata, H, Uekusa, S, Tsukamoto, T, Tsunoda, T & Imai, Y 1996, Structural properties of β-FeSi ₂ bulk crystal grown by horizontal gradient freeze method in Materials Research Society Symposium - Proceedings. vol. 402, Materials Research Society, pp. 331-336, Proceedings of the 1995 MRS Fall Symposium, Boston, MA, USA, 95/11/27.

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title = "Structural properties of β-FeSi 2 bulk crystal grown by horizontal gradient freeze method ",

abstract = "We report on the synthesis of β-FeSi 2 bulk materials using Horizontal Gradient Freeze (HGF) method. Chunk and powder FeSi 2 or high-purity Fe (4N) and Si (9N) were used as starting materials. Three values (1:2, 2:5 and 1:3) of the Fe:Si ratio were selected in the very narrow α and β ranges of the equilibrium phase diagram. Samples were melted between 1300°C and 1500°C in high purity graphite crucibles covered with boron nitride. After cooling, the samples were kept at 800°C and 900°C during 66 to 100 hours, leading to transformation from α to β phase. Cooling rate and annealing time were taken as the two main parameters to optimize the growth conditions. Principal structural characterization was made by X-ray diffraction (XRD). Correlation with stoichiometry was achieved using the results of Rutherford Backscattering Spectroscopy (RBS) and Electron Probe X-Ray Micro Analysis (EPXMA). The samples obtained from 1:2 ratio exhibited mainly β phase while the 2:5 ratio specimens revealed almost α phase structure. The samples prepared with 1:3 ratio was found as a mixture of α and β phases under Si-rich conditions. ",

author = "H. Kakemoto and Y. Tsai and Beye, {A. C.} and H. Katsumata and S. Sakuragi and Y. Makita and A. Obara and Naoto Kobayashi and H. Shibata and S. Uekusa and T. Tsukamoto and T. Tsunoda and Y. Imai",

year = "1996",

language = "English",

volume = "402",

pages = "331--336",

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T1 - Structural properties of β-FeSi 2 bulk crystal grown by horizontal gradient freeze method

AU - Kakemoto, H.

AU - Tsai, Y.

AU - Beye, A. C.

AU - Katsumata, H.

AU - Sakuragi, S.

AU - Makita, Y.

AU - Obara, A.

AU - Kobayashi, Naoto

AU - Shibata, H.

AU - Uekusa, S.

AU - Tsukamoto, T.

AU - Tsunoda, T.

AU - Imai, Y.

PY - 1996

Y1 - 1996

N2 - We report on the synthesis of β-FeSi 2 bulk materials using Horizontal Gradient Freeze (HGF) method. Chunk and powder FeSi 2 or high-purity Fe (4N) and Si (9N) were used as starting materials. Three values (1:2, 2:5 and 1:3) of the Fe:Si ratio were selected in the very narrow α and β ranges of the equilibrium phase diagram. Samples were melted between 1300°C and 1500°C in high purity graphite crucibles covered with boron nitride. After cooling, the samples were kept at 800°C and 900°C during 66 to 100 hours, leading to transformation from α to β phase. Cooling rate and annealing time were taken as the two main parameters to optimize the growth conditions. Principal structural characterization was made by X-ray diffraction (XRD). Correlation with stoichiometry was achieved using the results of Rutherford Backscattering Spectroscopy (RBS) and Electron Probe X-Ray Micro Analysis (EPXMA). The samples obtained from 1:2 ratio exhibited mainly β phase while the 2:5 ratio specimens revealed almost α phase structure. The samples prepared with 1:3 ratio was found as a mixture of α and β phases under Si-rich conditions.

AB - We report on the synthesis of β-FeSi 2 bulk materials using Horizontal Gradient Freeze (HGF) method. Chunk and powder FeSi 2 or high-purity Fe (4N) and Si (9N) were used as starting materials. Three values (1:2, 2:5 and 1:3) of the Fe:Si ratio were selected in the very narrow α and β ranges of the equilibrium phase diagram. Samples were melted between 1300°C and 1500°C in high purity graphite crucibles covered with boron nitride. After cooling, the samples were kept at 800°C and 900°C during 66 to 100 hours, leading to transformation from α to β phase. Cooling rate and annealing time were taken as the two main parameters to optimize the growth conditions. Principal structural characterization was made by X-ray diffraction (XRD). Correlation with stoichiometry was achieved using the results of Rutherford Backscattering Spectroscopy (RBS) and Electron Probe X-Ray Micro Analysis (EPXMA). The samples obtained from 1:2 ratio exhibited mainly β phase while the 2:5 ratio specimens revealed almost α phase structure. The samples prepared with 1:3 ratio was found as a mixture of α and β phases under Si-rich conditions.

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M3 - Conference contribution

AN - SCOPUS:0029735594

VL - 402

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BT - Materials Research Society Symposium - Proceedings

PB - Materials Research Society

T2 - Proceedings of the 1995 MRS Fall Symposium

Y2 - 27 November 1995 through 30 November 1995

ER -

Structural properties of β-FeSi ₂ bulk crystal grown by horizontal gradient freeze method

Abstract

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