Wear Behavior of Nano-Sized Metal Particle Dispersed Al2O3 Nanocomposites


Article Preview

The microstructure and mechanical properties including wear resistance of Al2O3-based nanocomposites with 5 vol% of Cu and Ni-Co dispersions were investigated. Al2O3/Cu and Al2O3/ Ni-Co nanocomposites were fabricated by hydrogen reduction and sintering process using metal oxide and metal nitrates. The composites showed homogeneous microstructures with nano-sized metal dispersions and enhanced fracture strength and toughness compared with monolithic Al2O3. In particular, high toughness and hardness were measured for the Al2O3/Ni-Co nanocomposite consolidated by PECS. A minimum wear coefficient of 2.33 x 10-5 mm3/Nm was obtained for the Al2O3/Ni-Co nanocomposite, while the monolithic Al2O3 showed a value of 2.0 x 10-5 mm3/Nm. Wear behavior is discussed in terms of microstructure and mechanical properties of the nanocomposites.



Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara




S. T. Oh et al., "Wear Behavior of Nano-Sized Metal Particle Dispersed Al2O3 Nanocomposites", Key Engineering Materials, Vols. 317-318, pp. 369-372, 2006

Online since:

August 2006




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

[2] R.W. Davidge, R.J. Brook, F. Cambier, M. Poorteman, A. Leriche, D. O'Sullivan, S. Hampshire and T. Kennedy: British Ceramic Transactions Vol. 96 (1997), p.121.

[3] H.J. Chen, W.M. Rainforth and W.E. Lee: Scripta. Mater. Vol. 42 (2000) p.555.

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

[5] S. -T. Oh, T. Sekino and K. Niihara: J. Eur. Ceram. Soc. Vol. 18 (1998), p.31.

[6] S. -T. Oh, M. Sando and K. Niihara: J. Mater. Sci. Vol. 36 (2001), p.1817.

[7] T. Ohji, Y. -K. Jeong, Y. -H. Choa and K. Niihara: J. Am. Ceram. Soc. Vol. 81 (1998), p.1453.

[8] S.J. Cho, B.J. Hockey, B.R. Lawn and S.J. Bennison: J. Am. Ceram. Soc. Vol. 72 (1989), p.1249.

[9] S. -H. Kim, S.W. Lee, Y. -H. Kim, D. -H. Riu, T. Sekino and K. Niihara: J. Korean Ceram. Soc. Vol. 38 (2001), p.1080.