Chapter 18. Anisotropy in Rectangular Bars Fabricated via Three-Dimensional Printing

  1. John B. Wachtman Jr.
  1. Bugra Giritlioglu and
  2. Michael J. Cima

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314784.ch18

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5

How to Cite

Giritlioglu, B. and Cima, M. J. (1995) Anisotropy in Rectangular Bars Fabricated via Three-Dimensional Printing, in Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314784.ch18

Author Information

  1. Massachusetts Institute of Technology, Department of Materials Science and Engineering, Cambridge, MA 02139

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1995

ISBN Information

Print ISBN: 9780470375389

Online ISBN: 9780470314784

SEARCH

Keywords:

  • implementing;
  • consistency;
  • analyzing;
  • characteristics;
  • concentrations

Summary

Rectangular bars were fabricated out of spray dried Al2O3 via three-dimensional printing (3DP). This paper investigates the effects of the current print style, a linear raster scan pattern, on the mechanical properties of the printed parts. The green parts were strongest along the fast axis, and weakest along the z axis, the ratio of mechanical strength being roughly equal to 3. The fired parts, on the other hand, were virtually isotropic. Average modulus of rupture (MOR) for bars that were warm isostatically pressed (WIP) and then fired was ∼ 340 MPa. SEM and 4-pt bending tests suggest that the anisotropy of both the defect structure and the mechanical strength in green bars is largely eliminated upon isostatic pressing and subsequent firing.