Accession Number:

ADA253450

Title:

Oxidation Protection Systems for Carbon-Carbon Composites Formed by Chemical Vapor Deposition and Plasma Assisted Chemical Vapor Deposition Techniques

Descriptive Note:

Final rept. 1 Mar 1988-28 Feb 1991

Corporate Author:

SOUTHERN ILLINOIS UNIV AT CARBONDALE MATERIALS TECHNOLOGY CENTER

Report Date:

1992-04-22

Pagination or Media Count:

388.0

Abstract:

A final report written in three sections. 1 CVI Densification of Carbon-Carbon Composites deals with the densification of porous preforms of carbonized carbon-resin mixtures using various methane and hydrogen gas mixtures. The experimental conditions include temperatures between 1000 deg C and 1200 deg C and total pressures between 5 and 15 torr. The resulting solid was characterized using optical and electron microscopy. 2 Oxidation Protection of Carbon-Carbon Composites Using Pack Cementation deals with formation of oxidation protective films formed from combinations of boron carbide, silicon carbide and zirconium carbide. Films were processed using a reactive process called pack cementation. The effects of initial powder composition and temperature were correlated with microstructure and oxidation resistance. 3 In The Formation of Oxidation Protective Coatings on Carbon- Carbon Composites Using a Chemical Vapor Deposition CVD Technique four types of CVD coatings were investigated SiC, ZrB ZrB SiC multilayer and graded SrCZrC. Coatings were produced as a function of temperature, pressure and gas flow rates. The resulting coatings were then characterized in terms of microstructure and oxidation resistance. OXIDATION RESISTANCE, CHEMICAL VAPOR DEPOSITION, CARBON-CARBON.

Subject Categories:

  • Physical Chemistry
  • Electrooptical and Optoelectronic Devices
  • Coatings, Colorants and Finishes
  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE