MEDSI2025 - 13th International Conference on Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation

In-situ characterization thermal contact variations between InGa and anti-corrosion layer for beamline thermal management

THP37

18 Sept 2025, 16:20

1h 10m

Poster Session Room (The Loop)

Poster Presentation Thermal Poster Session 3

Speaker

Jie Chen (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

Description

Liquid metals as thermal interface materials (TIMs) offer ultrahigh contact thermal conductance while their inherent compliance eliminates clamping stress-induced deformation in optical components, such as InGa bath or InGa gap cooling. However, their corrosivity toward metals (e.g., Cu, Al) necessitates protective coatings such as high-phosphorus electroless nickel (Ni-P), though minor corrosion persists during prolonged baking operation. To investigate the correlation between corrosion behavior and baking conditions (80~150 ℃/14 days), we developed an in situ measurement system for liquid metal thermal contact conductance. The setup employs a square-waved heating excitation method to monitor transient temperature responses (peak values, PV), coupled with finite element modeling, to quantify interfacial thermal conductance degradation. This work provides critical insights into thermochemical reliability for liquid metal cooling solutions in high-heat-load synchrotron optics.