Accession Number:

ADA433441

Title:

C-Ring Strength of Advanced Monolithic Ceramics

Descriptive Note:

Corporate Author:

OAK RIDGE NATIONAL LAB TN METALS AND CERAMICS DIV

Report Date:

2003-01-01

Pagination or Media Count:

9.0

Abstract:

Alumina, silicon carbide, silicon nitride, and zirconia are common candidate ceramics for load-bearing tubular components. To help facilitate design and reliability modeling with each ceramic, Weibull strength distributions were determined with each material using a diametrally compressed c-ring specimen in accordance with ASTM C1323. The investigated silicon nitride and zirconia were found to exhibit higher uncensored characteristic strengths than the alumina and silicon carbide. The occurrence of chamber-located fracture initiation was problematic, and hindered the ability to generate valid design data in some of these ceramics. Fractography and stress modeling results suggest that some aspects of ASTM C1323 should be revised to further minimize the frequency of chamber-located failure initiation in c-ring test specimens.

Subject Categories:

  • Inorganic Chemistry
  • Ceramics, Refractories and Glass
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE