Accession Number : ADD012213

Title :   Oxidation of Reduced Ceramic Products.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Coblenz,William S ; Rice,Roy W

Report Date : 04 Feb 1986

Pagination or Media Count : 12

Abstract : It is an object of this invention to provide a method for reoxidizing partially-reduced ceramic. It is another object of this invention to provide a method for preventing cracking of a partially-reduced ceramic from stresses occurring during reoxidation. It is a further object of this invention to provide a method for reoxidizing ceramics which have been processed under reducing conditions. These and other objects are achieved by placing a partially-reduced ceramic in a chamber having a nonreactive atmosphere and then introducing an oxidizing gas into the chamber at a rate which is slow enough to prevent the ceramic from cracking.

Descriptors :   *PATENTS, *CERAMIC MATERIALS, *OXIDATION, REDUCTION, HEAT TREATMENT, CHAMBERS, STRESS RELIEVING, CREEP, CRYSTAL LATTICES, STRAIN(MECHANICS), CRACKS, PREVENTION, PLASTIC FLOW, DIFFUSION, OXYGEN

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE