ASTM C1273 Tensile Strength of Monolithic Advanced Ceramics

The ASTM C1273 test method is used to identify the tensile strength of monolithic advanced ceramics under uniaxial stres s at ambient temperatures. This test method is intended for advanced ceramics that have isotropic, homogeneous, continuous behavior macroscopically.... Read More

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    Knoop indenters are used to make indentations in advanced ceramics as per ASTM C1326 and are one of the parameters used to characterize advanced ceramics. Knoop indents can also be used to measure the coating hardness of advanced ceramics. It is primarily used to prevent cracking in brittle materials and to make hardness testing of thin layers easier. In this ASTM C1326 test technique, the indentation load is aimed at creating indentations as large as feasible with traditional micro hardness equipment, but not so large as to cause breaking. 

    Test Procedure:

    The ASTM C1273 test method often uses a universal testing machine (UTM), which holds a specimen material in place while applying the tensile stress required to determine the breaking point. The apparatus is linked to an extensometer, which monitors changes in the length of the specimen. The tensile specimen is fashioned like a round rod with a big shoulder on either end from which the UTM may grab the material during tensile stress application. Changes in gauge length are measured when the machine pulls the specimen. The test is carried out in a controlled environment to eliminate the effects of other variables such as temperature and contaminants. 

    Specimen Size : 

    For ASTM C1273, flat and cylindrical tensile ceramic specimens are used as test specimens.


    In ASTM C1273, the tensile strength of ceramics is measured in pressure units, most often in Pascal. 

    The standard formula for the tensile strength:

    Su = Pmax / A


    Su = The tensile strength in units of MPa,
    Pmax = The breaking load

    A = The cross-sectional area in units of mm²


    The ASTM C1273 test method is used to identify the tensile strength of monolithic advanced ceramics under uniaxial stress at ambient temperatures. 


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