Breviary Technical Ceramics






10.5.3 Elastic Modulus

Because there is a material-specific relationship between the speed of sound, porosity and modulus of elasticity, ultrasonic testing can be used to determine the elastic modulus non-destructively. This method is suitable for finding small faults in the ceramic material. This does, however, require the ultrasonic instrumentation to be of high quality. To provide an indication of a 100 µm fault, a frequency of 100 MHz, tightly focusing test heads and instrumentation amplifiers are all required.


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