Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-20T06:34:12.315Z Has data issue: false hasContentIssue false
  • English
  • Français

Using Layered Manufacturing to Create Textured Microstructures in Si3N4 Ceramics

Published online by Cambridge University Press:  10 February 2011

S. Rangarajan ,
B. Harper ,
R. McCuiston ,
A. Safari ,
Z. Kalman ,
W. Mayo ,
S. C. Danforth  and
C. Gasdaska
S. Rangarajan
Affiliation:
Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, NJ 08854
B. Harper
Affiliation:
Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, NJ 08854
R. McCuiston
Affiliation:
Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, NJ 08854
A. Safari
Affiliation:
Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, NJ 08854
Z. Kalman
Affiliation:
Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, NJ 08854
W. Mayo
Affiliation:
Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, NJ 08854
S. C. Danforth
Affiliation:
Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, NJ 08854
C. Gasdaska
Affiliation:
Honeywell Technology Center, Morristown, NJ 07962
Get access

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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 625: Symposium Y – Solid Freeform & Additive Fabrication – 2000 , 2000 , 179
Copyright
Copyright © Materials Research Society 2000

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

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. 86–91 (1992).Google Scholar
2 U. S. Patent No. 5,121,329 (June 1992).Google Scholar
3 Hirao, K., Nagsoka, T., Brito, M. E., and Kanzaki, S., J. Am. Ceram. Soc., 77[7]1857–62(1994).Google Scholar
4 Hirao, K., Ohashi, M., Brito, M. E., and Kanzaki, S., J. Am. Ceram. Soc., 78[6]1687–90(1995).Google Scholar
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. 431–440.Google Scholar
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. 411–420.Google Scholar
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. 395–402.Google Scholar
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).Google Scholar
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).Google Scholar