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Ceramic Powder Compaction

Published online by Cambridge University Press:  29 November 2013

S. Jill Glass  and
Kevin G. Ewsuk
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Extract

Powder pressing, either uniaxially or isostatically, is the most common method used for high-volume production of ceramic components. The object of a pressing process is to form a net-shaped, homogeneously dense powder compact that is nominally free of defects. A typical pressing operation has three basic steps: (1) filling the mold or die with powder, (2) compacting the powder to a specific size and shape, and (3) ejecting the compact from the die. To optimize a pressing operation, experienced press operators generally understand and control parameters such as die-fill density, die-wall friction, packing density, and expansion on ejection.

Die filling/uniformity influences compaction density, which ultimately determines the size, shape, microstructure, and properties of the final sintered product. To optimize die filling and packing uniformity, free-flowing granulated powders are generally used. Spherical granules (i.e., agglomerates or clusters of finer particles) range in size from ~44 to 400 μm with the average size being ~100–200 μm. They are typically produced from 0.5 to 10-μm median particle-size powders by spray drying a ceramic powder slurry. To produce processable powders, various organic additives are typically added to the slurry prior to spray drying. These include binder(s) for strength, plasticizers that produce deformable granules, and lubricants that mitigate frictional effects. Consistent batching and dispersion of the granulated feed are critical for reproducible and uniform die filling. Granule densities that are 45–55% of the theoretical density (TD), and bulk-powder and die-fill densities of 25–35% TD are typical for ceramic powders.

Type
Compaction Science and Technology
Information
MRS Bulletin , Volume 22 , Issue 12 , December 1997 , pp. 24 - 28
Copyright
Copyright © Materials Research Society 1997

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References

1.McEntire, B.J., in Ceramics and Glasses, Engineered Materials Handbook, vol. 4 (ASM International, 1991) p. 141.Google Scholar
2.Reed, J.S., in Introduction to the Principles of Ceramic Processing (John Wiley & Sons, New York, 1988) p. 329.Google Scholar
3.Reed, J.S., in Principles of Ceramic Processing, 2nd ed. (John Wiley & Sons, New York, 1995) p. 418.Google Scholar
4.Reed, J.S. and Runk, R.B., in Ceramic Fabrication Processes, Treatise on Materials Science and Technology, vol. 9, edited by Wang, F.F.Y. (Academic Press, New York, 1976) p. 71.Google Scholar
5.Austin, G.F. and McTaggart, G.D., Ceramic Fabrication Processes p. 135.Google Scholar
6.Cass, R.B., Ewsuk, K.G., and Blumenthal, W.R., Ceram. Ind. 13 (4) (1997) p. 34.Google Scholar
7.Ewsuk, K.G., in Characterization of Ceramics, edited by Loehman, R.E. (Butterworth-Heinemann, Greenwich, CT, 1993) p. 77.Google Scholar
8.Readey, M.J. and Mahoney, F.M., in Diversity Into the Next Century, Int. SAMPE Tech. Conf. Ser., No. 27, edited by Martinez, R.J., Arris, H., Emerson, J.A., and Pike, G. (SAMPE International, Covina, CA, 1995) p. 622.Google Scholar
9.Lukasiewicz, S.J., in Ceramics and Glasses, ASM Engineered Materials Handbook, vol. 4 (ASM International, 1991) p. 100.Google Scholar
10.Reed, J.S., in Principles of Ceramic Processing, 2nd ed. (John Wiley & Sons, New York, 1995) p. 397.Google Scholar
11.Broese van Groenou, A. and Lissenburg, R.C.D., J. Am. Ceram. Soc. 13 (1983) p. C156.Google Scholar
12.German, R.M., Particle Packing Characteristics (Metal Powder Industries Federation, Princeton, NJ, 1989).Google Scholar
13.Artz, E., Acta Metall. 13 (1982) p. 1883.Google Scholar
14.Garino, T., Readey, M.J., Mahoney, F.M., Ewsuk, K.G., Gieske, J., Stoker, G., and Min, S., in Diversity Into the Next Century, Int. SAMPE Tech Conf. Ser., No. 27, edited by Martinez, R.J., Arris, H., Emerson, J.A., and Pike, G. (SAMPE International, Covina, CA, 1995) p. 610.Google Scholar
15.Glass, S.J., Ewsuk, K.G., and Mahoney, F.M., in Ceramic Manufacturing Practices and Technology, Ceramic Transactions, vol. 70, edited by Gupta, T.K., Hiremath, B., and Nair, K.M. (American Ceramic Society, Westerville, OH, 1996) p. 3.Google Scholar
16.Mahoney, F.M. and Readey, M.J., “Ceramic Compaction Models: Useful Design Tools or Simple Trend Indicators?” (unpublished manuscript).Google Scholar
17.Occhionero, M.A. and Halloran, J.W., in Sintering and Heterogeneous Catalysis, Materials Science Research, vol. 16, edited by Kuczynski, G.C., Miller, A.E., and Sargent, G.A. (Plenum Press, New York, 1984) p. 89.Google Scholar
18.Sacks, M.D., Yeh, T.S., and Vora, S.D., in Ceramic Powder Processing Science, edited by Hausner, H., Messing, G.L., and Hirano, S. (Deutsche Keramische Gesellschaft e.V. Köln, 1989) p. 693.Google Scholar
19.Richerson, D.W., in Modern Ceramic Engineering: Properties, Processing and Use in Design, 2nd ed. (Marcel Dekker Inc., New York, 1992) p. 418.Google Scholar
20.Aydin, I., Briscoe, B.J., and Sanliturk, K., Comp. Mater. Sci. 13 (1994) p. 55.CrossRefGoogle Scholar
21.Mahoney, F.M. and Readey, M.J., in Diversity Into the Next Century, Int. SAMPE Tech. Conf. Ser., No. 27, edited by Martinez, R.J., Arris, H., Emerson, J.A., and Pike, G. (SAMPE International, Covina, CA, 1995) p. 645.Google Scholar
22.Bernal, J. and Mason, J., Nature 13 (1960) p. 908.Google Scholar
23.Frost, H.J. and Raj, R., J. Am. Ceram. Soc. 13 (1982) p. C19.Google Scholar
24.Bocchini, G.F., Powder Metall. 13 (4) (1987) p. 261.CrossRefGoogle Scholar
25.Cesarano, J. III, McEuen, M.J., and Swiler, T., in Diversity Into the Next Century, Int. SAMPE Tech. Conf. Ser., No. 27, edited by Martinez, R.J., Arris, H., Emerson, J.A., and Pike, G. (SAMPE International, Covina, CA, 1995) p. 658.Google Scholar
26.Furnas, C.C., U.S. Mines Rep. Invest. 2894 (1928).Google Scholar
27.Glass, S.J. and Newton, C., in Science, Technology, and Commercialization of Powder Synthesis and Shape Forming Processes, Ceramic Transactions, vol. 62, edited by Kingsley, J.J., Schilling, C.H., and Adair, J.H. (American Ceramic Society, Westerville, OH, 1996) p. 203.Google Scholar
28.Brewer, J.A., Moore, R.H., and Reed, J.S., Am. Ceram. Soc. Bull. 13 (1981) p. 212.Google Scholar
29.DiMilia, R.A. and Reed, J.S., J. Am. Ceram. Soc. 13 (1983) p. 667.CrossRefGoogle Scholar
30.Wachtman, J.B., in Advanced Characterization Techniques for Ceramics, Ceramic Transactions, vol. 5, edited by Young, W.S., McVay, G.L., and Pike, G.E. (American Ceramic Society, Westerville, OH, 1989) p. 3.Google Scholar
31.Unkel, H., Archivfur das Eisenhuttenwesen 13 (1945) p. 161.CrossRefGoogle Scholar
32.Thompson, R.A., Am. Ceram. Soc. Bull. 13 (1981) p. 237.Google Scholar
33.Glass, S.J., Ewsuk, K.G., and Readey, M.J., in Diversity Into the Next Century, SAMPE Tech. Conf., No. 27, edited by Martinez, R.J., Arris, H., Emerson, J.A., and Pike, G. (SAMPE International, Covina, CA, 1995) p. 635.Google Scholar
34.Niesz, D.E., KONA Powder and Particle, No. 14 (1996) p. 43.Google Scholar
35.Cooper, A.R. and Eaton, L.E., J. Am. Ceram. Soc. 13 (1962) p. 97.CrossRefGoogle Scholar
36.Kenkre, V.M., Endicott, M.R., Glass, S.J., and Hurd, A.J., J. Am. Ceram. Soc. 13 (1996) p. 3045.CrossRefGoogle Scholar
37.Kawakita, K. and Liidde, K., Powder Technol. 13 (1970/1971) p. 61.Google Scholar
38.Walker, W.J., Reed, J.S., and Verna, S.K., “Influence of Granule Character on Strength and Weibull Modulus of Sintered Alumina,” J. Am. Ceram. Soc. in press.Google Scholar
39.Onoda, G., presented at the 97th Annual Meeting of the American Ceramic Society, Cincinnati, OH, 1995.Google Scholar
40.Zheng, J. and Reed, J.S., J. Am. Ceram. Soc. 13 (1988) p. C456.Google Scholar
41.Matsumoto, R.L.K., J. Am. Ceram. Soc. 13 (1990) p. 465.CrossRefGoogle Scholar