High-Temperature Testing Fixture for Ceramic O-Rings

Report No. ARL-TN-253
Authors: David Gray and Robert Kaste
Date/Pages: April 2006; 18 pages
Abstract: A test method is being used to determine the tensile strength of ceramic O-ring specimens as a part of an effort at the U.S. Army Research Laboratory to develop ceramic materials for gun barrel applications. The tensile strength of the inner surface of a ceramic O-ring specimen is determined by applying a compressive load at 2 points diametrically opposite each other on the specimen. Testing was conducted at room temperature and at 700 ?C. A test fixture was developed to facilitate the placement and alignment of the O-ring specimen during the 700 ?C testing. The fixture is described in this report, and preliminary data on silicon nitride (Si3N4) is provided to show the utility of the fixture.
Distribution: Approved for public release
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Last Update / Reviewed: April 1, 2006