Chapter 15. Powder Processing of Intermetallic-Base Composites

  1. John B. Wachtman Jr.
  1. D. E. Alman* and
  2. N. S. Stoloff

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314555.ch15

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

How to Cite

Alman, D. E. and Stoloff, N. S. (2008) Powder Processing of Intermetallic-Base Composites, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314555.ch15

Author Information

  1. Materials Engineering Department Rensselaer Polytechnic Institute Troy, New York 12180

*U.S. Bureau of Mines, Albany Oregon, 97321

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375334

Online ISBN: 9780470314555

SEARCH

Keywords:

  • fabricating intermetallic matrix composites;
  • reactive synthesis;
  • powder injection molding;
  • powder cloth;
  • powder infiltration

Summary

Reviewed in this paper is research aimed at fabricating intermetallic matrix composites based on the compound NiAl by reactive synthesis and powder injection molding (PIM). Reactive synthesis involves forming compounds by initiating reactions between elemental powders, and was used to form NiAl reinforced with TiB2 particles or Al2O3 fibers. Since elemental powders are readily available in a wide variety of shapes, sizes and purities, at relatively low cost; reactive synthesis has the potential for producing advanced materials with high purities in an economic manner. PIM allows for simultaneous alignment of short fibers and production of a near-net-shape components. Alignment of fibers in a powder matrix occurs by injecting a mixture of powders and fibers with a binder through a constricting nozzle. By proper die design, near-net-shaped aligned fibrous composites can be produced. The mechanical properties (tensile and compressive) of these composites were evaluated, and had properties comparable to composites produced by conventional techniques.