Accession Number:

ADA030878

Title:

Impact Resistance of Structural Ceramics. Part 1. Instrumented Drop- Weight Tests

Descriptive Note:

Interim rept. Jun 1975-Feb 1976

Corporate Author:

AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OH

Report Date:

1976-05-01

Pagination or Media Count:

72.0

Abstract:

Two mechanisms can lead to failure of ceramics under impact, 1 failure due to flexural stresses, and 2 failure due to Hertzian type cracks introduced locally by the impactor. An instrumented drop-weight test designed to study failure due to flexural stresses is described and used to study various forms of silicon nitride and silicon carbide up to 1300 C. Results on alumina and sialon are included for comparison. From the standpoint of impact resistance hot-pressed silicon nitride is the best material.

Subject Categories:

  • Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE