Accession Number : AD0835223

Title :   ABLATIVE COMPOSITES FOR LIFTING REENTRY THERMAL PROTECTION.

Descriptive Note : Summary rept. Jun 67-May 68,

Corporate Author : AVCO MISSILES SPACE AND ELECTRONICS GROUP LOWELL MA AVCO SPACE SYSTEMS DIV

Personal Author(s) : Thomas, H. K. ; Recesso, J. V.

Report Date : JUN 1968

Pagination or Media Count : 217

Abstract : An exploratory materials formulation, development and characterization program was conducted on low density ablative composites (16 to 25 pounds per cubic foot) to provide improved thermal protection materials for future lifting entry vehicles. Two types of ablative composites were identified, one material was based on a biphenol formaldehyde resin and the other was based on a rigid silicone resin. Both materials were formulated with coated phenolic microballoons and alumina-chromia-silica fibers. Characterization tests have been conducted to obtain ablative mechanical and thermal properties of the newly developed materials. (Author)

Descriptors :   *COMPOSITE MATERIALS), (*LIFTING REENTRY VEHICLES, HEAT SHIELDS), (*HEAT SHIELDS, PHENOLIC PLASTICS, SILICONE PLASTICS, WHISKERS(CRYSTALS), MECHANICAL PROPERTIES, THERMAL CONDUCTIVITY, ABLATION, DENSITY, TABLES(DATA), SPECIFIC HEAT, THERMOGRAVIMETRIC ANALYSIS, CORROSION RESISTANCE, COLORIMETRY, HEAT RESISTANT MATERIALS, ATMOSPHERE ENTRY.

Subject Categories : Laminates and Composite Materials
      Thermodynamics
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE