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Using Layered Manufacturing to Create Textured Microstructures in Si3N4 Ceramics

  • S. Rangarajan (a1), B. Harper (a1), R. McCuiston (a1), A. Safari (a1), Z. Kalman (a1), W. Mayo (a1), S. C. Danforth (a1) and C. Gasdaska (a2)...

Abstract

In recent years, seeding has been shown to be an effective method to create textured microstructures in Si 3N4, Al2O3 and PZT ceramics. The objective of this research is to create anisotropic and textured Si3N4 parts using the Fused Deposition of Ceramics (FDC) process. This technique is currently being developed to fabricate high performance structural Si 3N4 based components. In order to create the textured microstructures, rod-like β-Si3N4 seed particles are introduced into the FDC feedstock filaments. In this study, anisometric β-Si3N4 seeds were introduced into the starting α-Si3N4 powder (Honeywell's AS800 grade) at a 10 vol.% loading. The effects of the seeds (aspect ratio ∼4) on the viscosity and resultant microstructure were evaluated using capillary rheology, scanning electron microscopy, coefficient of thermal expansion (CTE) measurements, and x-ray diffraction. It is observed that the seeds do align during filament extrusion and a significant texture has been detected by x-ray diffraction and CTE measurements in FDC feedstock filaments and sintered FDC parts.

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1 Comb, J. W. and Priedeman, W. R. in Solid Freeform Fabrication Proceedings, 4, edited by Marcus, H. L., Beanman, J. J., Barlow, J. W., Bourell, D. L. and Crawford, R. H., Austin, TX, pp. 8691 (1992).
2 U. S. Patent No. 5,121,329 (June 1992).
3 Hirao, K., Nagsoka, T., Brito, M. E., and Kanzaki, S., J. Am. Ceram. Soc., 77[7]1857–62(1994).
4 Hirao, K., Ohashi, M., Brito, M. E., and Kanzaki, S., J. Am. Ceram. Soc., 78[6]1687–90(1995).
5 Rangarajan, S., Qi, G., Bandyopadhyay, A., Dai, C., Han, J. W., Bhargava, P., Wu, S., Safari, A., and Danforth, S. C. in The Role of Materials Processing Variables, in the FDC Process, edited by Bourell, D. L., Beaman, J. J., Crawford, R. H., Marcus, H. L., and Barlow, J. W. (Solid Freeform Fabrication Symposium, Austin, TX, 1997) pp. 431440.
6 Dai, C., Qi, G., Rangarajan, S., Wu, S., Langrana, N. A., Safari, A., and Danforth, S. C. in High Quality, Fully Dense Ceramic Components Manufactured Using Fused Deposition of Ceramics (FDC), edited by Bourell, D. L., Beaman, J. J., Crawford, R. H., Marcus, H. L., and Barlow, J. W. (Solid Freeform Fabrication Symposium, Austin, TX, 1997) pp. 411420.
7 Bhargava, P., Bandyopadhyay, A., Rangarajan, S., Qi, G., Dai, C., Wu, S., Danforth, S. C., and Safari, A. in Shrinkage, Weight Loss, and Crack Prevention During Binder Burn Out of Components Produced by Fused Deposition of Ceramics (FDC), edited by Bourell, D. L., Beaman, J. J., Crawford, R. H., Marcus, H. L., and Barlow, J. W. (Solid Freeform Fabrication Symposium, Austin, TX, 1997) pp. 395402.
8 Becher, P. F., Sun, E. Y., Plucknett, K. P., Alexander, K. B., Hsuch, C. H., Lin, H. T., Walters, S. B., and Westmoreland, C. G., J. Am. Ceram. Soc., 81[11]12821–30(1998).
9 Sun, E., Becher, P. F., Pluchnett, K. P., Hsueh, C. H., Alexander, K. B., and Walter, S. B., J. Am. Ceram. Soc., 81[11]2831–40(1998).

Using Layered Manufacturing to Create Textured Microstructures in Si3N4 Ceramics

  • S. Rangarajan (a1), B. Harper (a1), R. McCuiston (a1), A. Safari (a1), Z. Kalman (a1), W. Mayo (a1), S. C. Danforth (a1) and C. Gasdaska (a2)...

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