Accession Number:

AD0785547

Title:

Thermal and Acoustic Fatigue of Ceramics and Their Evaluation

Descriptive Note:

Final rept. Jun 1971-Sep 1973

Corporate Author:

ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA

Personal Author(s):

• Seaton, Charles C.

Report Date:

1974-06-01

Pagination or Media Count:

33.0

Abstract:

A brief evaluation of the behavior of some important ceramic materials subjected to thermal and acoustic stress is presented. The criteria for evaluation included measurements of transverse rupture strength, elastic modulus, and internal friction. The chief emphasis is on a brief review of pertinent literature and techniques developed for performing such tests. Comments on the principal results of recent investigations are included. The problem of acoustic fatigue in ceramics was clearly demonstrated. This phenomenon may have important ramifications for the potential use of ceramics in acoustically active environments e.g., gas turbine blades, bearings, and seals.

Descriptors:

• *CERAMIC MATERIALS
• *SONIC FATIGUE
• *THERMAL SHOCK
• ALUMINATES
• BORON CARBIDES
• ELASTIC PROPERTIES
• GAS TURBINES
• INTERNAL FRICTION
• MECHANICAL PROPERTIES
• RUPTURE
• SILICON CARBIDES
• SILICON NITRIDES
• TEST METHODS
• TITANIUM BORIDE

Subject Categories:

• Ceramics, Refractories and Glass
• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE