Paper number 390


M. Doktor1, J. Blucher2, and H.P. Degischer1

1Institute of Materials Science, Vienna University of Technology
Karlsplatz 13/E308, A-1040 Vienna, Austria
2Department of Mechanical Engineering, Northeastern University Boston
360 Huntington Avenue, Boston, Massachusetts 02115, USA

Summary With a continuous infiltration process fiber reinforced aluminum wires with 1.5mm outside diameter, lengths up to 200m and volume fractions of 35 to 60% have been successfully produced. As reinforcement different ceramic fibers like Nextel 610, Nextel 440 and Altex and also carbon fibers, Thornel P-25, have been used. The matrix material is aluminum. Investigations of the cross section with optical and scanning electron microscope show high infiltration quality and a good fiber distribution. The tensile strengths of all ceramic fiber reinforced wires are within the expectations from the rule of mixture (ROM). For the carbon fiber reinforced composite wires even higher values were measured. From dynamic three point bending tests Young's module within or slightly below the ROM prediction were found. The electric conductivity is dominated by the matrix material, even the carbon fibers do not contribute.
Keywords continuous fibers, gas pressure infiltration, aluminum matrix composites.

Theme : Metal Matrix Composites ; Processing and Forming

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