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Reactive Infiltration Processing of Bulk and Fiber-Reinforced NiAl

  • T. A. Venkatesh (a1), C. W. Sanmarchi (a1), A. Mortensen (a1) and D. C. Dunand (a1)

Abstract

Reactive infiltration processing was investigated in the NiAl system using nickel-powder and nickel-wire preforms. Inhomogeneous microstructures were often obtained with powder preforms which had high surface-to-volume ratio, low permeability and irregular infiltration paths. Homogenous NiAl could be obtained with nickel-wire preforms which had lower surface-to-volume ratio, higher permeability and regular infiltration paths. NiAl composites reinforced with short molybdenum fibers and long tungsten and sapphire fibers were also fabricated by reactive infiltration.

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Reactive Infiltration Processing of Bulk and Fiber-Reinforced NiAl

  • T. A. Venkatesh (a1), C. W. Sanmarchi (a1), A. Mortensen (a1) and D. C. Dunand (a1)

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