Preliminary Evaluation of Low-Density, Low-Conductivity PAN Ablative CompositesIn this study, the mechanical response of four low-density, low conductivity polyacrylonitrile (PAN) based carbon fiber reinforced phenolic resin composites was investigated, each prepared with ceramic microballoon fillers. Two of the four PAN composite systems were fabricated with 20% microballoon filler content, while the other two systems were fabricated with 15% microballoon content. Composites with 20% microballoon content were cured at pressures of 1.65 MPa and 0.35 MPa, whereas systems with 15% microballoon content were cured at 1.65 MPa and 0.69 MPa. The improvement in mechanical properties achieved by the influences of the microballoon content and the cure pressure was assessed by comparing the uniaxial tensile results of static strength of the composite at room temperature. Results included stress-strain curves, ultimate strength, strain-to-failure, initial modulus of the PAN composite, and the description of the observed modes of failure.
Veazie, David R. (Clark-Atlanta Univ. GA United States)
Vaughn, Keva (Clark-Atlanta Univ. GA United States)
August 17, 2013
January 1, 1997
Publication: The First National Student Conference: NASA University Research Centers at Minority Institutions