Optimization of sintering processes

The perfect tool for the optimization of sintering processes

The RFDA or Resonant Frequency and Damping Analyser is measurement system based on the impulse excitation technique. In this non-destructive method a sample is tapped with a small projectile, which causes the sample to vibrate. These vibrations are picked up by a microphone or laser vibrometer and accurately analysed by the RFDA. The fundamental flexural vibration frequency is determined and used to calculate the Young’s modulus. Applying this procedure during a sintering cycle gives access to the change of Young’s modulus as well as change of internal friction during the sintering process. Further analysis and interpretation of the slope of the measurement curves provides adequate information such as when phase transformations take place during the temperature cycle and thus the possibility to further optimize the sintering process. As a time- and material-efficient alternative to other destructive tests, such as the three point bending test, this technique can complete an entire temperature cycle in a shorter time span.