Sintering of Mechanically Activated Powders



Mechanical activation (MA) is used extensively as a relatively no expensive method for the modification of physico-chemical properties of dispersed systems in technologies for obtaining powders and ceramics. Different processes that occur during MA of powders lead to the formation of specific structures that promote and accelerate solid-state reactions, as well as densification during sintering. Changes of particle size and structure during MA of the ceramic parent material are the sources of the morphological and structural metastability of the starting powders and they can affect the sintering process, positively or negatively. Many properties of final polycrystalline ceramics strongly depend on a green body microstructure and on conditions under which the green body is sintered. From the other side green body microstructure depend on a powders characteristics such as morphology, particle and pore size distributions. Regarding above mentioned activation and sintering must therefore be carried out under strictly controlled conditions in order to avoid influences that might cause a deterioration of the final properties of the ceramic materials. The present study is focused on the processes of sintering that occurred in mechanically activated single and multiphase oxide powders.







T. Sreckovic, "Sintering of Mechanically Activated Powders", Advances in Science and Technology, Vol. 45, pp. 619-628, 2006


October 2006




[1] H. Gleiter, Prog. Mater. Sci. 33 (1989), p.223.

[2] H. Gleiter, Acta Mater. 48 (2000), p.1.

[3] J. Schoonman, Solid State Ionics 135 (2000), p.5.

[4] C.C. Koch, Nanostructured Materials 9 (1997), p.13.

[5] E.G. Avvakumov, Mechanical Methods of the Activation of Chemical Processes (Novosibirsk, 1986).

[6] G.S. Upadhyaya, Mat. Chem. Phys. 67 (2001), p.1.

[7] M.G. Kakazey, V.A. Melnikova, T. Sreckovic, T.V. Tomila, M.M. Ristic, J. Mat. Sci. 34 (1999), p.1691.


[8] T. Sreckovic, N.S. Nikolic, R. Novakovic, M.M. Ristic, Mat. Eng. 12 (2001), p.33.

[9] N. Nikolic, T. Sreckovic, M.M. Ristic, J. Eur. Ceram. Soc. 21 (2001), p. (2071).

[10] I.R. Evans, J.A.K. Howard, T. Sreckovic, M.M. Ristic, Mat. Res. Bull. 38 (2003), p.120.

[11] N. Nikolic, Z. Marinkovic, T. Sreckovic, J. Mat. Sci. 39 (2004), p.5239.

[12] M.M. Ristic, S. Dj. Milosevic, Mechanical Activation of Inorganic Materials (Serbian Academy of Sciences and Arts, Belgrade 1998).

[13] C. Suryanarayana, Progress in Materials Science 46 (2001), p.1.

[14] G. Heinike, Tribochemistry (Akademie-Verlag, Berlin1984).

[15] K. Tkacova, Mechanical Activation of Minerals (Elsevier, Amsterdam1989).

[16] E. Avvakumov, M. Senna, N. Kosova, Soft mechanochemical synthesis (Kluwer, Academic Publishers, Boston-Dordrecht-London 2001).

[17] C. Legros, C. Carry, P. Bowen, H. Hofmann, J. Eur. Ceram. Soc. 19 (1999), p. (1967).

[18] J. Horvat, Feffect & Diff. Forum 66-69 (1989), p.207.

[19] R.L. Coble, Reactive sintering, in Sintering - Theory and Practise (Elsevier Scientific, Amsterdam 1982, p.145).

[20] L.C. De Jonghe, M.N. Rahaman, Reaction sintering: the role of microstructure, in Sintering Technology (Marcel Dekker, New York 1966, p.457).

[21] J.R. Groza, Nanostruc. Mater. 12 (1999), p.987.

[22] P.L. Chen, I.W. Chen, J. Am. Ceram. Soc. 80 (1997), p.637.

[23] C. Herrings, J. Appl. Phys. 21 (1950), p.301.

[24] D.L. Zhang, Prog. Mat Sci. 49 (2004), p.537.