기계적 합금화에 의한 Iron-Silicide의 제조 및 특성

어순철; 김일호; Soon-Chul Ur; Il-Ho Kim

Korean Journal of Materials Research, Vol.11, No.2, 132-136, February, 2001

Export Citation

기계적 합금화에 의한 Iron-Silicide의 제조 및 특성

Processing and Properties of Mechanically Alloyed Iron-Silicide

어순철 , 김일호

충주대학교 재료공학과

Soon-Chul Ur , and Il-Ho Kim

Dept. of Materials Science & Engineering, Chungju National University, Chungju, CHungbuk 380-702, Korea

초록

기계적 합금화 공정을 이용하여 열전재료 FeSi 2 분말을 제조하여 열간압축법을 사용하여 성형하였다. 열간압축 성형된 FeSi 2 는 열전특성을 나타내는 β - FeSi 2 상 및 상변태가 완료되지 않은 α - Fe 2 Si 5 와 ε -FeSi의 혼합상으로 이루어져 있음이 확인되었다. 열전재료로의 β - FeSi 2 상변태 유도를 위해 항온열처리를 행하여 상변태 조건을 조사하였다. SEM, TEM, XRD, DTA 등을 이용하여 상변태 거동을 분석한 결과, 830 ? C 에서 24시간 진공 항온열처리 후 단상의 β -FeSi 2 상을 얻을 수 있었다. 항온열처리 전의 열간압축 성형체와 상변태가 완료된 β -FeSi 2 의 기계적 성질과 열전 특성을 측정하여 비교 분석하였다.

Iron- silicide has been produced by mechanical alloying process and consolidated by hot pressing. As-consolidated iron silicides were consisted of β -FeSi 2 phase, and untransformed mixture of α - Fe 2 Si 5 and ε -FeSi phases. Isothermal annealing has been carried out to induce the transformation to a thermoelectric semiconducting β - FeSi 2 phase. The condition for β -FeSi 2 transformation was investigated by utilizing DTA, SEM, TEM and XRD analysis. The phase transformation was shown to be taken place by a vacuum isothermal annealing at 830 ? C for 24 hours. The mechanical and thermoelectric properties of β -FeSi 2 materials before and after isothermal annealing were characterized in this study.

Keywords:Iron silicide;mechanical alloying;hot pressing;thermoelectric

[References]

Ware RM, McNeil DJ, Proc. IEE, 111(1), 178 (1964)
Birkholz U, Scheim J, Fiz. Stat. Sol, 27, 413 (1968)
Dusausay PY, Protas J, Wandi R, Roques B, Acta Crystal. B, 27(1), 209 (1971)
Tokita S, Amano T, Okabayashi M, Nishida IA, Proc. 12th Int'l Conf. on Thermoelectrics, Nov. 9-11, Yokohama, Japan, 197 (1993) (1993)
Isoda I, Shinohara Y, Imai Y, Nishida IA, Ohashi O, Proc. 17th Int'l Conf. on Thermoelectrics, May 24-28, Nagoya, Japan, 390 (1998) (1998)
Yamauchi I, Ohnaka I, Uyema S, Proc. 12th Int'l Conf. on Thermoelectrics, Nov. 9-11, Yokoha-ma, Japan, 289 (1993) (1993)
Shiga S, Fujimoto K, Umemoto M, Proc. 12th Int'l Conf. on Thermoelectrics, Nov. 9-11, Yokoha-ma, Japan, 311 (1993) (1993)
Nishida I, Phy. Rev. B, 7, 2710 (1971)
Birkholtz U, Schelm J, Phy. Stat. Sol., 27, 413 (1968)
Benjamin JS, Met. Trans, 1, 1943 (1970)
Rowe DM, Schuka VS, J. Appl. Phys., 52(12), 7421 (1981)
Ur SC, Nash P, Higgins GT, Scripta Materialia, 34(1), 53 (1996)
Hwang SJ, Nash P, Dollar M, Dymek S, Mater. Sci. Forum, 88-90, 611 (1990)
Uemoto M, Mater. Trans., 36, 373 (1995)
Raynor GV, Girlin VG, 'Phase equilibria in iron ternary alloy', Institutes of Metals, 47 (1988) (1988)
Kojima T, Okamoto M, Nishida I, Proc. 5th Int'l Conf. on Thermoelectric Energy Conversion, 5 (1984)
Nishida I, Phys. Rev. B, 7, 2710 (1973)
Sakata T, Sakai Y, Yoshino H, Fujii H, Nishida I, J. Less Common Metals, 61, 301 (1978)

[Referenced By]

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[1] Ware RM, McNeil DJ, Proc. IEE, 111(1), 178 (1964)

[2] Birkholz U, Scheim J, Fiz. Stat. Sol, 27, 413 (1968)

[3] Dusausay PY, Protas J, Wandi R, Roques B, Acta Crystal. B, 27(1), 209 (1971)

[4] Tokita S, Amano T, Okabayashi M, Nishida IA, Proc. 12th Int'l Conf. on Thermoelectrics, Nov. 9-11, Yokohama, Japan, 197 (1993) (1993)

[5] Isoda I, Shinohara Y, Imai Y, Nishida IA, Ohashi O, Proc. 17th Int'l Conf. on Thermoelectrics, May 24-28, Nagoya, Japan, 390 (1998) (1998)

[6] Yamauchi I, Ohnaka I, Uyema S, Proc. 12th Int'l Conf. on Thermoelectrics, Nov. 9-11, Yokoha-ma, Japan, 289 (1993) (1993)

[7] Shiga S, Fujimoto K, Umemoto M, Proc. 12th Int'l Conf. on Thermoelectrics, Nov. 9-11, Yokoha-ma, Japan, 311 (1993) (1993)

[8] Nishida I, Phy. Rev. B, 7, 2710 (1971)

[9] Birkholtz U, Schelm J, Phy. Stat. Sol., 27, 413 (1968)

[10] Benjamin JS, Met. Trans, 1, 1943 (1970)

[11] Rowe DM, Schuka VS, J. Appl. Phys., 52(12), 7421 (1981)

[12] Ur SC, Nash P, Higgins GT, Scripta Materialia, 34(1), 53 (1996)

[13] Hwang SJ, Nash P, Dollar M, Dymek S, Mater. Sci. Forum, 88-90, 611 (1990)

[14] Uemoto M, Mater. Trans., 36, 373 (1995)

[15] Raynor GV, Girlin VG, 'Phase equilibria in iron ternary alloy', Institutes of Metals, 47 (1988) (1988)

[16] Kojima T, Okamoto M, Nishida I, Proc. 5th Int'l Conf. on Thermoelectric Energy Conversion, 5 (1984)

[17] Nishida I, Phys. Rev. B, 7, 2710 (1973)

[18] Sakata T, Sakai Y, Yoshino H, Fujii H, Nishida I, J. Less Common Metals, 61, 301 (1978)