Accession Number:

AD0805438

Title:

HIGH TEMPERATURE PROTECTIVE COATINGS FOR GRAPHITE

Descriptive Note:

Final summary technical rept. 1 Jun 1965-31 May 1966

Corporate Author:

UNION CARBIDE CORP PARMA OH CARBON PRODUCTS DIV

Report Date:

1966-11-01

Pagination or Media Count:

113.0

Abstract:

The final annual report of a three-year program concerning basic factors controlling the oxidation behavior of high temperature protective coatings for graphite is presented. The work includes the permeabiltiy of Al2O3, ZrO2 in contact with ZrB2, and ThO2 in contact with ZrB2 to oxygen the iridium-carbon eutectic temperature the thermal expansion of ZrB2, HfB2, and various composites of ZrB2 and HfB2 with one of the rare earth hexaborides, CeB6, YB6, or LaB6 the deposition of ZrB2 on graphite via the decomposition of ZrBH44 the diffusion of carbon in zirconium monocarbide and zirconium diboride a review of the literature concerning the vapor species in the iridium-oxygen system and mass spectrometric studies involving the dissociation of CaZrO3 at temperatures to 1600 C and HfSiO4 at temperatures to 2000 C.

Subject Categories:

  • Geology, Geochemistry and Mineralogy
  • Coatings, Colorants and Finishes

Distribution Statement:

APPROVED FOR PUBLIC RELEASE