나노크기 Ni-Fe 합금입자 분산 Al 2 O 3   나노복합재료의 합성 및 특성

남궁석; 오승탁; 이재성; 정영근; 김형섭; Gung-Seok Nam; Seung-Tak Oh; Jae-Seong Lee; Yeong-Geun Jeong; Hyeong-Seop Kim

Korean Journal of Materials Research, Vol.11, No.11, 986-990, November, 2001

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나노크기 Ni-Fe 합금입자 분산 Al 2 O 3 나노복합재료의 합성 및 특성

Synthesis and Properties of Nano-sized Ni-Fe Alloy Particle Dispersed Al 2 O 3 Nanocomposite

남궁석, 오승탁, 이재성^†, 정영근¹, 김형섭²

한양대학교 금속재료공학과
¹요업기술원 나노소재팀
²충남대학교 금속공학과

Gung-Seok Nam, Seung-Tak Oh, Jae-Seong Lee^†, Yeong-Geun Jeong¹, and Hyeong-Seop Kim²

Department of Metallurgy and Materials Science, Hanyang University, Ansan, 425-791, Korea
¹Nano Materials Laboratory, Korea Institute of Ceramic Engineering and Technology, 233-5 Gasan-Dong, Seoul 153-023, Korea
²Department of Metallugical Engineering, Chungnam National University, Taejon 305-764, Korea

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An optimum route to fabricate the A1 2 O 3 /Fe?Ni alloy nanocomposites with sound microstructure and enhanced mechanical properties as well as magnetism was investigated. To prepare homogeneous nanocomposite powders of Fe-Ni alloy and Al 2 O 3 , the solution-chemistry routes using Al 2 O 3 Ni(NO 3 ) 2 ?6H 2 O and Fe(NO 3 ) 3 ?9H 2 O powders were applied. Microstructural observation of the powder mixture revealed that the Fe-Ni alloy particles of about 20 nm in size were homogeneously surrounded A1 2 O 3 , forming nanocomposite powder. The hot-pressed composite showed improved fracture toughness and magnetic response. These results suggest that the synergy materials with an improved mechanical properties and excellent functionality can be fabricated by controlled powder preparation and consolidation processing.

Keywords:Nanocomposite;Fracture toughness;Magnetic properties;Powder processing

[References]

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Knorr P, Nam JG, Lee JS, Metall. Mater. Trans., 31A(2), 503 (2000)
Lee JS, Kim TH, Yu JH, Chung SW, Nanostr. Mater., 9(1-8), 153 (1997)
Knorr P, Kim BS, Lee JS, Mat. Res. Symp. Proc., 577, 409 (1999)
Schicker S, Erny T, Garcia DE, Janssen R, Claussen N, J. Eur. Ceram. Soc., 19(13-14), 2455 (1999)
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Qin XY, Lee JS, Kim JG, J. Appl. Phys., 86(4), 2146 (1999)

[1] Niihara K, J. Ceram. Soc. Jpn., 99(10), 974 (1991)

[2] Sekino T, Niihara K, J. Mater. Sci., 32(15), 3943 (1997)

[3] Oh ST, Sekino T, Niihara K, J. Eur. Ceram. Soc., 18(1), 31 (1998)

[4] Sekino T, Nakajima T, Ueda S, Niihara K, J. Am. Ceram. Soc., 80(5), 1139 (1997)

[5] Oh ST, Sando M, Niihara K, J. Am. Ceram. Soc., 81(11), 3013 (1998)

[6] Hyuga H, Hayashi Y, Sekino T, Niihara K, Nanostr. Mater., 9(1-8), 547 (1997)

[7] Oh ST, Sando M, Niihara K, J. Mater. Sci., 36(7), 1817 (2001)

[8] Cullity BD, Introduction to Magnetic Materials, pp. 525, Addison-Wesley, Massachusetts, USA, (1972) (1972)

[9] Niihara K, Morena R, Hasselman DPH, J. Mater. Sci. Lett., 1, 13 (1982)

[10] Knorr P, Nam JG, Lee JS, Metall. Mater. Trans., 31A(2), 503 (2000)

[11] Lee JS, Kim TH, Yu JH, Chung SW, Nanostr. Mater., 9(1-8), 153 (1997)

[12] Knorr P, Kim BS, Lee JS, Mat. Res. Symp. Proc., 577, 409 (1999)

[13] Schicker S, Erny T, Garcia DE, Janssen R, Claussen N, J. Eur. Ceram. Soc., 19(13-14), 2455 (1999)

[14] Smith CS, Trans. Metall. Soc. AIME, 175, 15 (1948)

[15] Evans AG, J. Am. Ceram. Soc., 73(2), 187 (1990)

[16] Budiansky B, Amazigo JC, Evans AG, J. Mech. Phys. Solids., 36(2), 167 (1988)

[17] Qin XY, Kim JG, Lee JS, Nanostr. Mater., 11(2), 259 (1999)

[18] Qin XY, Lee JS, Kim JG, J. Appl. Phys., 86(4), 2146 (1999)