Hostname: page-component-6bf8c574d5-gr6zb Total loading time: 0 Render date: 2025-02-22T17:08:09.372Z Has data issue: false hasContentIssue false
  • English
  • Français

Powder Processing and Densification of Ceramic Composites

Published online by Cambridge University Press:  21 February 2011

Fred F. Lange ,
David C. C. Lam  and
Olivier Sudre
Fred F. Lange
Affiliation:
Materials Department, College of Engineering, University of California, Santa Barbara, Santa Barbara, CA 93106
David C. C. Lam
Affiliation:
Materials Department, College of Engineering, University of California, Santa Barbara, Santa Barbara, CA 93106
Olivier Sudre
Affiliation:
Materials Department, College of Engineering, University of California, Santa Barbara, Santa Barbara, CA 93106
Get access

Abstract

Two issues, packing powder/reinforcement systems and constrained densification, are reviewed. It is shown that pressure filtration has the greatest potential for packing powders containing reinforcements and packing powders within reinforcement preforms. High particle packing is achieved with repulsive interparticle potentials, and for a very small particle to reinforcement diameter ratio. It is now clear that individual reinforcements do not constrain the densification of powders. Shrinkage constraint is caused by a network of either nontouching or touching reinforcements. Network shrinkage (and thus composite shrinkage) caused by powder densification leads to the development of a denser interconnected matrix material surrounding lower density regions. Densification of the lower density regions requires the creep deformation of the denser continuum. As detailed elsewhere in this proceedings, grain growth causes this denser continuum to become more resistant to creep, and coarsening within the lower density regions causes desintering and the dissipation of sintering ‘stresses’. These phenomena do not occur during the densification of glass powders and explains the different densification behavior of crystalline powder matrices relative to glass powder matrices.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 155: Symposium L – Processing Science of Advanced Ceramics , 1989 , 309
Copyright
Copyright © Materials Research Society 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Jamet, J.-F., Anquez, L., Parlier, M., Ritti, M.-H., Peres, P., and Grateau, L., “Composite Céramique: Relations Entre Microstructure et Rupture,” L'Aéronautique et l'Astronautique, No. 123/124, 12842 (1987).Google Scholar
2. Naslain, R., “Fibrous Ceramic-Ceramic Composite Materials Processing and Properties,” J. de Phys. Colloque C1, sup. au no. 2, vol.47, C1-703–715 (1986).Google Scholar
3. Pyzik, A. J., Aksay, A. A. and Sarikaya, M., “Microdesigning of Ceramic-Metal Composites,” in Ceramics Microstructures '86, Role of Interfaces, pp 45–54, Ed. by Pask, J. A. and Evans, A. G., Plenum Press, N.Y. (1987).Google Scholar
4. Newkirk, M. S., W.Urquhart, A., Zwicker, H. R., and Breval, E., “Formation of Lanxide Ceramic Materials,” J. Mater. Res. 1 [1] 81–9 (1986).Google Scholar
5. Lam, D. and Lange, F. F., to be published.Google Scholar
6. Jamet, J., Damange, D. and Loubeau, J., “Nouveaux Matériaux Composites Alumine-Alumine à Rupture Fortement Dissipative et Leur Préparation,” French Patent No. 2,526,785, Nov. 18, 1983.Google Scholar
7. Lange, F. F., Velamakanni, B. V., and Evans, A. G. “A New Method for Processing Metal Reinforced Ceramic Composites,”(to be published).Google Scholar
8. Lange, F. F. and Miller, K. T., “Pressure Filtration: Kinetics and Mechanics,” Bul. Am. Ceram. Soc. 66 [10], 1498–1504 (1987).Google Scholar
9. Jonghe, L. C. De, Rahaman, M. N. and Hsueh, C. H., “Transient Stresses in Bimodal Compacts During Sintering,” Acta. Metall. 34 [7] 1467–71 (1986).Google Scholar
10. Bordia, R. K. and Raj, R., “Sintering of TiO2-Al2O3 Composites-A Model Experimental Investigation,” J. Am. Ceram. Soc. 71 [4] 302–10 (1988).Google Scholar
11. Brook, R. J., Tuan, W. H., and Xue, L. A., “Critical Issues and Future Directions in Sintering Science,” Ceram. Trans., V 1, Ceramic Powder Science, Ed. by Messing, G. L., Fuller, E. R., and Hausner, H., 811–21, Am. Ceram. Soc. (1988).Google Scholar
12. Onoda, G. Y. and Messing, G. L., “Packing and Sintering Relations for Binary Powders,” in Processing of Crystalline Ceramics, Materials Science Research Vol 11, ed by Palmour, I-L, Davis, R. F. and Hare, T. M., pp 99–112, Plenum Press, 1978.Google Scholar
13. Hsueh, C.-H., Evans, A. G., and McMeeking, R. M., “Influence of Multiple Heterogeneities on Sintering Rates,” J. Am Ceram. Soc. 69 [4] C64–6 (1986).Google Scholar
14. Raj, R. and Bordia, R. K., “Sintering Behavior of Bi-modal Powder Compacts,” Acta Met. 32 [7] 1003–20 (1984).Google Scholar
15. Scherer, G. W., “Sintering with Rigid Inclusions,” J. Am. Ceram. Soc., 70 [10] 719–25 (1987).Google Scholar
16. Lange, F. F., “Densification of Powder Rings Constrained by Dense Cylindrical Cores,” Acta Met. 37 [2] 697–704 (1989).Google Scholar
17. Porter, J. R. and Lange, F. F., unpublished work.Google Scholar
18. Lange, F. F., “Constrained Network Model for Predicting Densification Behavior of Composite Powder,” J. Mater. Res. 2 [1] 59–65, 1987.Google Scholar
19. Sudre, O., Lam, D. C. C., and Lange, F. F., “Densification Behavior of ZrO2 Reinforced Al2O3 Composites,” This Proceedings.Google Scholar
20. Sacks, M. D., Lee, H.-W., and Rojas, O. E., “Suspension Processing of Al2O3/SiC Whisker Composites,” J. Am. Ceram. Soc. 71 [5], 370–9 (1988).Google Scholar
21. Lange, F. F., Marshall, D. B., and Folsom, C., “Fiber Reinforced Laminated Ceramic Composite,” Patent under application.Google Scholar