GB/T 37246-2018Test method for thermal-shock resistance of fine ceramics (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard specifies the terms and definitions, principles, instruments, and tests for characterizing the thermal shock resistance of fine ceramics by bending strength attenuation. Samples, test procedures, thermal shock resistance calculations and test reports.

This standard applies to the performance evaluation and design of fine ceramic materials.

Note 1. There are 3 commonly used thermal shock test methods, namely rapid cooling method, rapid heating method and rapid heating and cooling method. Ceramics are sensitive to tensile stress and surface defects are A source of crack propagation will result in a decrease in strength. The rapid cooling method produces the maximum tensile stress on the ceramic surface, which is the most demanding test condition for ceramics. because Therefore, this standard uses the rapid cooling method.

Note 2. In many thermal shock test methods, liquid or gas is required as the cooling medium, and the liquid has better cooling effect than the gas. Therefore, this standard uses water. For cooling media.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 1216 outer diameter micrometer

GB/T 6569 Fine ceramic bending strength test method

GB/T 17991 fine ceramic terminology

GB/T 21389 cursor, table and digital caliper

3 Terms and definitions

The following terms and definitions as defined in GB/T 17991 apply to this document.