Cu-Based Nanocomposite Produced by a Non-equilibrium Method

Young-Soon Kwon; Ji-Soon Kim; Pyuck-Pa Choi; Jun-Ho Song; Dina Dudina

Journal of Industrial and Engineering Chemistry, Vol.11, No.1, 103-109, January, 2005

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Cu-Based Nanocomposite Produced by a Non-equilibrium Method

Young-Soon Kwon, Ji-Soon Kim^†, Pyuck-Pa Choi, Jun-Ho Song, and Dina Dudina¹

School of Materials Science & Engineering, Research Center for Machine Parts and Materials Processing, University of Ulsan, 680-749, Korea
¹Institute of Solid State Chemistry and Mechanochemistry, SB RAS, Novosibirsk 630128, Russian Federation

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A nanocomposite Cu-TiB2 powder was synthesized in situ by means of self-propagating high temperature synthesis (SHS) using high-energy ball-milled Ti-B-Cu elemental mixtures as powder precursors. The effect of the preliminary mechanical treatment on the SHS reaction was studied. The size of the TiB2 particles produced by SHS decreased upon increasing the duration of the preliminary mechanical treatment. Subsequent mechanical treatment of the SHS products led to a reduction of the sizes of the TiB2 particles down to 30~50 nm. The microstructural evolution of the synthesized powder compacts during sintering was investigated. During spark plasma sintering, a fine-grained skeleton of TiB2 with well-connected particles was formed. This interpenetrating phase composite of Cu-TiB2 is produced by the simultaneous action of pressure, temperature, and electrical current. The TiB2 nanoparticles distributed in the copper matrix agglomerate to form a fine-grained skeleton. Upon conventional sintering, the nanoparticles show a surprising behavior: at low temperatures, fiber-like structures are formed while higher temperatures caused faceted crystals to be observed.

Keywords:metal matrix composite;titanium diboride;self-propagating high-temperature synthesis;spark-plasma sintering;interpenetrating phase

[References]

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[2] Tjong SC, Ma ZY, Mater. Sci. Eng., 29, 49 (2000)

[3] Lee J, Jung JY, Lee ES, Park WJ, Ahn S, Kim NJ, Mater. Sci. Eng., A277, 274 (2000)

[4] Tu JP, Wang NY, Yang YZ, Qi WX, Liu F, Zhang XB, Lu HM, Liu MS, Mater. Lett., 52, 448 (2002)

[5] Yussa E, Powder Metall., 35, 120 (1992)

[6] Biselli C, Morris DG, Randall N, Scripta Metall. Mater., 30, 1327 (1994)

[7] Dong SJ, Zhou Y, Shi YW, Chang BH, Metall. Mater. Trans. A-Phys. Metall. Mater. Sci., 33A, 1275 (2002)

[8] Merzhanov AG, Solid-state combustion (in Russian) ISMAN, Chernogolovka (2000)

[9] Levashov EA, Proc. All-Russian Conference Combustion and explosion processes in chemistry and technology of inorganic materials, pp. 219 (in Russian), Moscow (2002)

[10] Smagin GI, Yakovlev ND, Korchagin MA, Siberian Instrument, 1, 23 (2001)

[11] Merzhanov AG, Combustion and plasma synthesis of high-temperature materials, VCH Publishers, New York (1990)

[12] Rogachev AS, Ponomarev VI, in Self-propagating high-temperature synthesis: theory and practice (in Russian), Territoriya, Chernogolovka (2001)

[13] Koidzumi M, Chemistry of combustion synthesis (translated from Japanese), Mir, Moscow (1998)

[14] Avvakumov EG, Potkin AR, Samarin OI, Planetary mill. Author's certificate No. 975068, USSR, Patent Bulletin No. 43 (1982)

[15] Tokita M, J. Soc. Powder Technol. Jpn., 30, 790 (1993)

[16] Clarke DR, J. Am. Ceram. Soc., 75, 739 (1992)

[17] Zhou W, Hu W, Zhang D, Scr. Mater., 39, 1743 (1998)

[18] Portnoy KI, Babich BN, Dispersion strengthened materials (in Russian), pp. 53, Metallurgiya, Moscow (1974)

[19] Serrano DP, Grieken R, J. Mater. Chem., 11, 2391 (2001)

[20] Paritskaya LN, Poroshkovaya Metallurgiya (in Russian), 6, 28 (1984)