Thermophysical Properties of Six Charring Ablators from 140 deg to 700 deg K and Two Chars from 800 deg to 3000 deg K.
Abstract
Thermophysical property data of the type necessary for the performance analysis and design of entry heat-shields are presented for several ablation materials over the temperature range from -200 deg to 5000 deg F (144 deg to 3030 deg K). The data include enthalpy, specific heat, thermal conductivity, thermal expansion, density, and tensile and compressive mechanical properties of six ablation materials over the temperature range from -200 deg to 800 deg F (144 deg to 700 deg K). The enthalpy, specific heat, thermal conductivity, and total normal emittance of the chars formed from thermal degradation of two of the materials are also included. The char properties were measured over the temperature range from 1000 deg to 5000 deg F (810 deg to 3030 deg K). The materials studied are a high-density phenolic-nylon, a low-density phenolic-nylon, a filled silicone resin, the filled silicone resin in honeycomb, a carbon-fiber-reinforced phenolic, and a low-density filled epoxy in honeycomb. The first four materials were formulated and fabricated at the NASA Langley Research Center. The last two are commercially produced materials - Narmco 4028 and Avcoat 5026-39-HC G. The chars studied were produced from the high- and low-density phenolic-nylon materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1965
- Accession Number
- ADA307485
Entities
People
- R. G. Wilson
Organizations
- Langley Research Center