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The Effect of Particle Migration on the Creep-Rate of Nanocomposites

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Abstract:

The tensile creep behaviour of a mullite-SiC nanocomposite containing 5 vol% of SiC particles deformed under stresses from 4 to 50 MPa at 1400 °C has been studied. After grain-size effects had been accounted for, the creep-rate of the nanocomposite was found to be approximately 30× less than that of the monolithic mullite. It is suggested that this reduction is caused not by a threshold stress but by the extra work required to drive diffusion in the low diffusivity SiC particles so that they can move with the grain boundaries during creep. A model is presented which predicts the rate of creep under these conditions and gives reasonable agreement with the experiments at low stresses.

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Periodical:

Key Engineering Materials (Volumes 317-318)

Pages:

445-448

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.317-318.445

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Online since:

August 2006

Authors:

J.E. Pitchford, E. Lidén, Stefan Gustafsson, L.K.L. Falk, Elis Carlström, W.J. Clegg

Keywords:

Creep, Diffusion Creep, Grain Boundary, Mullite, Nanocomposite, Silicon Carbide (SiC)

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] K. Niihara and A. Nakahira: Proceedings of the Third International Symposium on Ceramic Materials and Components for Engines (American Ceramic Society 1988), p.919.

Google Scholar

[2] K. Niihara: Proceedings of the International Meeting on Advanced Materials Vol 4 (Materials Research Society of Japan 1989), p.124.

Google Scholar

[3] T. Ohji, A. Nakahira, T. Hirano and K. Niihara; J. Amer. Ceram. Soc. Vol 77 (1994) p.3259.

Google Scholar

[4] A.M. Thompson, H.M. Chan and M.P. Harmer: J. Amer. Ceram. Soc. Vol 80 (1997) p.2221.

Google Scholar

[5] T. Ohji, T. Kusunose and K. Niihara: J. Amer. Ceram. Soc. Vol 81 (1998) p.2713.

Google Scholar

[6] M.F. Ashby and R.M.A. Centamore: Acta Metall. Vol 16 (1968) p.1081.

Google Scholar

[7] J.D. Hong and R.F. Davis: J. Amer. Ceram. Soc. Vol. 63 (1980) p.546.

Google Scholar

[8] P.M. Sargent and M.F. Ashby: Scripta Met. Vol 17 (1983) p.951.

Google Scholar

[9] W.J. Clegg, A. Kelly and J.E. Pitchford: Key Eng. Mats. Vols 161-163 (1999) p.315.

Google Scholar