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Thermal Characterization of Select Metallic Phase Change Materials for Transient Load Thermal Management
Conference proceeding

Thermal Characterization of Select Metallic Phase Change Materials for Transient Load Thermal Management

Kayden T. Maiorine, Rachel C. McAfee, Harshil M. Patel, Adam A. Wilson and Michael C. Fish
InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, pp 1-6
27 May 2025
DOI: https://doi.org/10.1109/ITherm55376.2025.11235798

Abstract

Conductivity Land surface temperature material thermal properties nucleation Phase change materials Thermal conductivity thermal enhancement Thermal expansion Thermal loading Thermal management Tin Transient analysis Xenon
Metallic phase change materials (PCMs) are an attractive option to balance quick response for transient load leveling due to their higher thermal conductivity, however, information for complete thermal characterization is only available for select materials. In this study, nine alloys were completely tested for density, melting temperature, latent heat, specific heat, thermal diffusivity, and solid thermal conductivity using differential scanning calorimetry (DSC), discovery xenon flash (DXF), and volume displacement methods. Results of the above combination of testing procedures has focused the interest of authors towards an alloy composed of50 \%Indium50 \%Tin, known by its manufacturer as Indalloy 1. Indalloy 1 exhibited uniform and predictable phase change behavior while undergoing thermal cycling. The PCM Power Figure of Merit was calculated for Indalloy 1, Indalloy 27, Indalloy 174, and Field's Metal as 85.7,61.1,69.8 , and 58, respectively in units of\mathrm{kJ} / \mathrm{m}^{2}-\mathrm{K}^{0.5}-\mathrm{s}^{0.5} . Indalloy 1 with a high FOM of85.7 \mathrm{~kJ} / \mathrm{m}^{2}-\mathrm{K}^{0.5-} \mathrm{s}^{0.5}demonstrates performance comparable to Field's Metal, a well-established alloy, but with a higher transition temperature, making it better suited for certain applications. These findings support further studies into Indalloy 1 as a candidate for advanced thermal management solutions.

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