About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Research in Reduced Gravity
|
| Presentation Title |
Modulation Calorimetry Frequency for Thermal Conductivity Calculations in Noncontact Electromagnetic Levitation |
| Author(s) |
Regan Krizan, Lydia E. Tonani-Penha, Gwendolyn P. Bracker, Robert W. Hyers |
| On-Site Speaker (Planned) |
Regan Krizan |
| Abstract Scope |
Modulation calorimetry is a well-established technique for determining thermal diffusivity, specific heat capacity, and thermal conductivity of materials. It relies on an oscillating heat input that produces a corresponding temperature response. At low frequencies, the primary heat transfer occurs between the sample and its environment, while higher frequencies reveal internal thermal gradients. At elevated temperatures, these measurements become difficult due to material reactivity with its container. Electromagnetic levitation (EML) enables measurements in a containerless environment by using a magnetic field to levitate and heat samples. Modulation calorimetry in EML is repeatably successful for measuring specific heat capacity. However, accurately determining thermal conductivity remains challenging because of the presence of convection and choosing an ideal frequency. Higher frequencies improve resolution of internal gradients but reduce the temperature amplitude. This study explores the limitations of modulation calorimetry and frequency ranges for reliable thermal conductivity measurements. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Modeling and Simulation, Other |