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A Critical Assessment of Porosity Coarsening during Solid State Sintering

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Abstract:

Understanding porosity coarsening is essential for controlling the properties of sintered materials and for producing high density or near net shape parts. As porosity is interconnected up to relative densities in excess of 80% or even 95%, measuring, monitoring and modelling of the growth of individual pores is relevant only at very high relative densities. This paper tries to convey two essentials of porosity coarsening: (i) characterization of the geometry of the pore space in the lower range of densities is possible by using stereological parameters, and (ii) coarsening of porosity takes place during all sintering stages by various mechanisms. Porosity coarsening has been reported in metals, ceramics and glasses. Recent and classical approaches, experimental results with two dimensional model arrangements as well as computer simulations of formation and opening of particle contacts are discussed. The effect of porosity dimensions on the properties of sintered materials and measures for preventing and provoking porosity coarsening are briefly addressed.

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Periodical:

Advances in Science and Technology (Volume 45)

Pages:

539-548

DOI:

https://doi.org/10.4028/www.scientific.net/AST.45.539

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Online since:

October 2006

Authors:

Hans Eckart Exner, Günter Petzow

Keywords:

Channel Closure, Coarsening Mechanisms, Dimension Change, Doping, Geometry of Porosity, Interface Smoothening, Modeling, Porosity, Property Analysis, Rearrangement, Ripening, Simulation, Stereological Characterisation

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] H.E. Exner and E. Arzt: Sintering Processes, in: Physical Metallurgy, 4th Edition, Vol. 3, Chapter 33, R.W. Cahn and P. Haasen (Eds. ): Elsevier Science, Amsterdam (1996) p.2627.

DOI: 10.1016/b978-044489875-3/50036-3

Google Scholar

[2] E.H. Aigeltinger and R.T. De Hoff: Met. Trans. 6A (1975) p.1853.

Google Scholar

[3] H.E. Exner: Quantitative Description of Microstructures by Image Analysis, in: Materials Science and Technology, R.W. Cahn, P. Haasen, E.J. Kramer (Eds. ), Vol. 2B, Part II, CHVerlagsgesellschaft mbH, Weinheim (1994) p.281.

Google Scholar

[4] G.A.L. van de Vorrst: Modelling and Numerical Simulation of Viscous Sintreing, Thesis Eindhoven University of Technology (Febodruk, Enschede, The Netherlands, 1994).

Google Scholar

[5] H.E. Exner: Reviews on Powder Metallurgy and Physical Ceramics 1 (1979) p.7.

Google Scholar

[6] J. Pan: Internat. Mater. Reviews 48 (2003) p.69.

Google Scholar

[7] T. Kraft and H. Riedel: J. Europ. Ceram. Soc. 24 (2004) p.345.

Google Scholar

[8] H.E. Exner and G. Petzow: Radex-Rundschau (1977 p.171.

Google Scholar

[9] H.E. Exner and D. Pohl, in: Gefüge und Bruch, Gebr. Bornträger Verl., Berlin (1977) p.73.

Google Scholar

[10] B.D. Flinn, R.D. Bordia, A. Zimmermann and J. Rödel: J. Europ. Ceram. Soc. 20 (2000) p.2561.

Google Scholar

[11] C.A. Handwerker, J. E. Blendell and R.L. Coble: Sintering of Ceramics, in: Science of Sintering, D.P. Uskokovic, H. Palmour and R.M. Spriggs (Eds. ): Plenum Press, New York (1989) p.3.

DOI: 10.1007/978-1-4899-0933-6_1

Google Scholar

[12] J. Han, P.Q. Mantas and A.M.R. Senos: J. Mater. Res. 16 (2001) p.459.

Google Scholar

[13] S. Somiya (Ed. ): Sintering Key Papers, (Elsevier Science Publishers Ltd., New York, 1990).

Google Scholar

[14] G.C. Kuczynski ( Ed. ): Sintering Processes (Plenum Press, New York, 1980).

Google Scholar

[15] G.C. Kuczynski ( Ed. ): Sintering and Catalysis Plenum Press, New York, 1975).

Google Scholar

[16] H. Palmour, R.F. Davis and T. M. Hare (Eds. ): Processing of Crystalline Ceramics, (Plenum Press, New York, 1978). l====l 10 µm l====l 5 µm l====l 5 µm.

Google Scholar