Ablation Performance, Thermal Properties, and Microstructures of 2D, 2.5D, and 3D Carbon/Phenolic Ablatives
A study to analyze the effects of carbon fiber architecture on ablation performance and insulative properties was conducted for three carbon/phenolic (C/Ph) materials. The three materials tested were 2D laminates of MX-4926 C/Ph manufactured by Cytec-Solvay, 2.5D laminates of C/Ph manufactured by Allcomp Inc., and a 3D woven C/Ph manufactured by Airbus Safran Launchers. An oxy-acetylene test bed (OTB) was used with a neutral flame, heat flux of 1,000 W/cm2, and an exposure time of 40 seconds to characterize the performance of these samples. Data collection was conducted using a two-color infrared (IR) pyrometer, IR video camera, high-definition (HD) video camera, and a shielded K-type thermocouple. This paper reports the density, total ablation, ablation rate, total mass loss, mass loss rate, IR surface temperature, and heat-soaked temperature of the tested samples. Behavior of the materials under the specified test conditions were analyzed with the IR and HD video camera footage. The microstructures of pre- and post-test ablatives were analyzed using scanning electron microscopy (SEM).
Author: Ethan Liu, Joseph H. Koo, and Ty Templin
Conference: SAMPE Seattle 2017