Abstract
The production of ceramic bodies with less surface roughness is industrially important when one considers the aspect of final machining processes. Hence an attempt have been made to study the variation in surface roughness parameters (R a, R y, R z) of alumina having three different kinds of roughness features at different sintering temperatures. Variation in surface roughness properties are also correlated with grain size. R z shows significant difference between fine and intermediate surfaces, hence predicts small difference in their microstructural features. As a general trend, average grain size increases with increase in sintering temperature, but wide distribution of grains with enhanced non-uniform grain growth is observed when the surface is coarse. Hence, creation of fine surface in the green body is necessary for homogeneously distributed grains with controlled uniform grain growth. The final roughness and grain size of the sintered alumina depend on the initial surface roughness of the green body.
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References
Bhamra G, Palin W M and Fleming G J 2002 J. Dent. 30 153
Boccaccini A R and Winkler V 2002 Composites Part A — Appl. Sci. & Manufac. 33 125
Franco A, Roberts, S G and Warren P D 1997 Acta Mat. 45 1009
Gadelmawla E S, Koura M M, Maksoud T M A, Elewa I M and Soliman H H 2002 J. Mater. Proc. Tech. 123 133
He Z and Ma J 2000 Mater. Lett. 44 14
Hockey B J and Rice R W (eds) 1979 The science of ceramic machining and surface finishing II, NBS SP 562 (Washington DC: US Government Printing Office)
Jahanmir S (ed.) 1993 Machining of advanced materials, NIST SP847 (Washington DC: US Government Printing Office)
Kirchner H P 1984 J. Am. Ceram. Soc. 67 127
Marshall D B, Evans A G, Yakub B T K, Tien J W and Kino G S 1983 Proc. R. Soc. London A385 461
Mendelson M I 1969 J. Am. Ceram. Soc. 52 443
Narayan P and Hancock B 2003 Mater. Sci. Eng. A355 24
Wong H C, Umehara N and Kato K 1998 Wear 218 237
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Nampi, P.P., Kume, S., Hotta, Y. et al. Effect of surface roughness on grain growth and sintering of alumina. Bull Mater Sci 34, 799 (2011). https://doi.org/10.1007/s12034-011-0197-y
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DOI: https://doi.org/10.1007/s12034-011-0197-y