ASTM C1525 Determining Thermal Shock Resistance of Advanced Ceramics by Water Quenching

ASTM C1525-18 test method is used to determine the Thermal Shock Resistance of Advanced Ceramics by Water Quenching. The rmal shock resistance refers to the material's ability to withstand extreme and rapid changes in temperature.... Read More

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    Scope:

    ASTM C1525-18 test method is useful for material development, quality control, and durability assessment of advanced ceramics with regards to thermal shock. 

    Thermal shock is the stress experienced by materials with extreme and rapid changes in temperature. The surface layers of the material might contract against the inner layers, leading to the development of tensile stress and the propagation of cracks. The ability of a material to endure such temperature changes without changes in its properties is called Thermal Shock Resistance.

    In many engineering applications, materials must perform across a broad range of temperatures and ceramics are an excellent choice for such engineering applications because they show excellent resistance against extreme temperatures.

    Test Procedure:

    In ASTM C1525-18 test method, a ceramic sample is given a thermal shock by heating it and instantly quenching it with a cool water bath, and then the effect of the thermal shock is assessed by measuring the reduction in flexural strength. 

    Data:

    In ASTM C1525-18, the flexural strength of the prismatic test specimens is calculated as follows: 

    S = 3P (L0 – L1)/2bd2

    Where, 

    S = flexural strength, 

    P = measured fracture load,

    (L0 – L1) = outer and inner spans, respectively, m, 

    b = test specimen width, m, and 

    d= test specimen height, m.

    The strength of cylindrical test specimens is calculated as follows: 

    S = P (L0 – L1)/πr3

    Conclusion:

    ASTM C1525-18 test method is used to determine Thermal Shock Resistance of Advanced Ceramics by Water Quenching. It is helpful for material development, quality control, and durability assessment of advanced ceramics regarding thermal shock.

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