W-Ni-Fe 중합금의 미세조직 변화에 대한 μ-phase의 영향

김대건; 김은표; 김영도; Dae-Gun Kim; Eun-Pyo Kim; Young Do Kim

Korean Journal of Materials Research, Vol.12, No.1, 16-20, January, 2002

DOI10.3740/MRSK.2002.12.1.016 Export Citation

W-Ni-Fe 중합금의 미세조직 변화에 대한 μ-phase의 영향

Effect of μ-Phase on Microstructural Change of W-Ni-Fe Heavy Alloys

김대건^†, 김은표¹, 김영도

한양대학교 재료공학부
¹국방과학연구소

Dae-Gun Kim^†, Eun-Pyo Kim¹, and Young Do Kim

Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea
¹Agency for Defense Development, Dae-jon 305-600, Korea

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In this study, the 95W heavy alloys of 3/7, 5/5 and 7/3 of Ni/Fe ratio were sintered at the temperature range between 1420 and 1480 ? C for 1h and their microstructures were discussed for an effect of the μ -phase (Fe 7 W 6 ) on the microstructure. The μ -phase was observed in the only 95W-1.5Ni-3.5Fe alloy of 3/7 and it is thought to be formed and grown from the surface of the W particle. The W particle was surrounded with the μ -phase and there were only the W particles and this phase without Ni-Fe-W matrix at the most part. The μ -phase changed the interphase structure in the alloy and the grain growth of the W was suppressed because of interrupting the solution-reprecipitation of the W. The W content in the matrix was considered to be lowered due to the interruption of the solution-reprecipitation and the formation of the μ -phase in the matrix.

Keywords:W-Ni-Fe heavy alloy;Ni/Fe ratio;μ --phase

[References]

Kim EP, Ph. D. thesis. Hanyang. Univ. (1998) (1998)
Yih SWH, Wang CT, Tungsten. Plenum Press. New York. 413 (1979) (1979)
German RM, Liquid Phase Sintering, Plenum Press. New York. 4 (1985) (1985)
Ryu HJ, Hong SH, Baek WH, J. Mat. Processing Tech., 63, 292 (1997)
Muddle BC, Met. Trans., 15A, 1089 (1986)
Spencer JR, Mullendore JA, Tungsten and Tungsten Alloys, TMS edited by Bose A, Dewing RJ, 111 (1992) (1992)
Caldwell SG, Tungsten and Tungsten Alloys. TMS. edited by Bose A, Dewing RJ, 89 (1992) (1992)
Guillermet AF, Ostlund L, Met. Trans., 17A, 1809 (1986)
Henig ET, Hofmann H, Petzow G, 10th Plansee Seminar, 335 (1981)
Naidu SVN, Sriramamurthy AM, Rao PR, Binary Alloy Phase Diagrams. 2nd ed. Vol.3 edited by Massalski TB, etc. 2282-2283 (1990) (1990)
Naidu SVN, Sriramamurthy AM, Rao PR, Binary Alloy Phase Diagrams. 2nd ed. Vol.2 edited by Massalski TB, etc. 1791-1793 (1990) (1990)
German RM, Sintering Theory and Practice, John Wiley & Sons, INC., New York 256 (1996) (1996)

[Related Articles]

[1] Kim EP, Ph. D. thesis. Hanyang. Univ. (1998) (1998)

[2] Yih SWH, Wang CT, Tungsten. Plenum Press. New York. 413 (1979) (1979)

[3] German RM, Liquid Phase Sintering, Plenum Press. New York. 4 (1985) (1985)

[4] Ryu HJ, Hong SH, Baek WH, J. Mat. Processing Tech., 63, 292 (1997)

[5] Muddle BC, Met. Trans., 15A, 1089 (1986)

[6] Spencer JR, Mullendore JA, Tungsten and Tungsten Alloys, TMS edited by Bose A, Dewing RJ, 111 (1992) (1992)

[7] Caldwell SG, Tungsten and Tungsten Alloys. TMS. edited by Bose A, Dewing RJ, 89 (1992) (1992)

[8] Guillermet AF, Ostlund L, Met. Trans., 17A, 1809 (1986)

[9] Henig ET, Hofmann H, Petzow G, 10th Plansee Seminar, 335 (1981)

[10] Naidu SVN, Sriramamurthy AM, Rao PR, Binary Alloy Phase Diagrams. 2nd ed. Vol.3 edited by Massalski TB, etc. 2282-2283 (1990) (1990)

[11] Naidu SVN, Sriramamurthy AM, Rao PR, Binary Alloy Phase Diagrams. 2nd ed. Vol.2 edited by Massalski TB, etc. 1791-1793 (1990) (1990)

[12] German RM, Sintering Theory and Practice, John Wiley & Sons, INC., New York 256 (1996) (1996)