Rapid response electromagnetically driven calorimeter

Schematic of calorimeter insert; Bottom: DSC data showing a phase transformation temperature shift during a spinodal decomposition in Alnico as magnetic field strength increases.
A fully functional calorimeter which operates at high heating rates via induction heating and with static magnetic fields has been granted a patent.

CMI researchers at Oak Ridge National Laboratory and Ames Laboratory conducted the research for this CMI highlight

Achievement
A fully functional calorimeter which operates at high heating rates via induction heating and with static magnetic fields has been granted a patent.

Significance and impact

  • The invention enables measurement of transformation temperatures in bulk materials for magnetic fields (0-9 T), at high temperatures (up to 1750 C), and at high heating rates (>1000 C/min)
  • Streamlines experimental design to optimize heat treatments in magnetic and other materials
  • Compatible with existing commercial processing technology

Next steps
Publish existing data and continue developing technology to achieve quantitative heat flow measurements.