ASTM C 1366 (C-1366) is the standard test method for determining the tensile strength of monolithic advanced ceramics, by axial loading, at elevated temperatures. ASTM C1366 utilizes either cylindrical or flat dumbell and dogbone shaped specimens. Test specimen geometry is not specified by ASTM C1366; instead geometry is determined on the end use for the tensile strength data and the end use of the ceramic product. Split collet grips are specified for active and passive grip interfaces with cylindrical specimens, flat face wedge grips for active grip interfaces with flat specimens, and pins or pivots of the same radius as the specimen shoulder for passive grip interfaces with flat specimens.

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