|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XXII
||Employment of Diamond-like Carbon and Chromium Carbide Coatings as Diffusion Barrier Layers against Ga-based Thermal Interface Materials (TIMs): Efficacy and Impact on Heat Transfer
||Yifan Wu, Amy Marconnet, Carol Handwerker
|On-Site Speaker (Planned)
Room temperature liquid metal alloys from gallium have attracted attention as candidates for next-generation thermal interface materials (TIMs) for their high thermal conductivity and intrinsic conformability. However, high reactivity of Ga with metals, i.e. Al embrittlement and corrosion of Cu and Ni, presents a particular challenge that must be addressed for its successful integration into electronics. As a mitigation strategy against Ga corrosion, we tested diamond-like carbon (DLC) and chromium carbide (CrC) coatings for their efficacy as diffusion barriers. Both coating types were proven to offer excellent protection up to 30 days of accelerated aging in contact with Ga at 125℃, showing no interfacial reaction. The impact the barrier layers have on the heat transfer across the interface was measured as a function of both the coating type and the aging time. We demonstrate that a 5μm-thick CrC coating offers sufficient protection, but increases the thermal interface resistance by ~20%.
||Electronic Materials, Surface Modification and Coatings, Phase Transformations