TOM_wave

TOM_wave is a new measuring system for the detection of material properties at high temperatures. The device is based on the experience the Fraunhofer-Center HTL has gathered with the known devices of the series of thermo-optical measuring systems (TOM) and combines a high-temperature furnace (1800 °C) and a CO2 laser (600 W). The furnace is used to reach the base temperature - in a controlled atmosphere - the laser is used for further short-term heating of the samples to generate special measurement signals. The measurement signals are recorded with pyrometers and microphones. TOM_wave uses disc-shaped samples with a volume of about 10 to 20 cm³. With an automatic sample changer, 5 samples are measured in one temperature cycle. Refractory materials, ceramics, composites, metals or glasses can be analyzed with TOM_wave.

The following thermomechanical and optical material properties are measured after completion of the test operation:

• Thermal shock resistance
• Resistance  to thermocycling
• Thermal conductivity
• Dynamic modulus of elasticity
• Coefficient of thermal expansion
• Heat capacity
• Spectral and integral emissivity

• Analysis of the thermomechanical properties of high-temperature materials
• Temperature range from room temperature to 1800 °C in a controlled atmosphere
• Measurement of thermal shock and thermocyclic resistance in custom temperature cycles
• Non-contact measurement of the thermal diffusivity (radial and axial)
• Measuring other parameters such as specific heat, thermal conductivity, emissivity