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Fabrication of Al2O3/5 vol% Cu Nanocomposites Using Various Powder Mixtures and Its Properties

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Abstract:

An optimum route to fabricate the Al2O3/Cu nanocomposites with sound microstructure and improved mechanical properties was investigated. Three powder mixtures of Al2O3 and Cu, CuO or Cu-nitrate were used to obtain Al2O3/5 vol% Cu composites. Microstructural investigations for the composite from Al2O3/Cu-nitrate showed that fine Cu particles, about 150 nm in diameter, were homogeneously distributed within the Al2O3 matrix grains and at the grain boundaries. Fracture toughness of 4.8 MPam and strength of 953 MPa were measured for the Al2O3/5 vol% Cu nanocomposites prepared from Al2O3/Cu-nitrate mixture. The toughening and strengthening of the composites are explained by the crack bridging/deflection and the refinement of the microstructure, respectively.

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Info:

Periodical:

Materials Science Forum (Volumes 449-452)

Pages:

1213-1216

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.449-452.1213

Citation:

Cite this paper

Online since:

March 2004

Authors:

Sung Tag Oh, Yong Ho Choa, Young Do Kim

Keywords:

Mechanical Property, Microstructure, Nanocomposite, Powder Processing

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References

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

Google Scholar

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

Google Scholar

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

Google Scholar

[4] H. Hyuga, Y. Hayashi, T. Sekino and K. Niihara: Nanostr. Mater. Vol. 9 (1997), p.547.

Google Scholar

[5] R. Roy: Science Vol. 238 (1987), p.1664.

Google Scholar

[6] C.S. Smith: Trans. Metal. Soc. AIME Vol. 175 (1948), p.15.

Google Scholar

[7] B. Budiansky, J.C. Amazigo and A.G. Evans: J. Mech. Phys. Solids. Vol. 36 (1988), p.167.

Google Scholar

[8] W.H. Tuan and R.J. Brook: J. Europ. Ceram. Soc. Vol. 6 (1990), p.31.

Google Scholar

[9] W.D. Kingery, H.K. Bowen and D.R. Uhlmann: Introduction to Ceramics (John Wiley and Sons, New York 1976).

Google Scholar

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