Anomalous Temperature-Dependent Interfacial Thermal Resistance Due to Melting

• DOI: 10.1021/acs.jpclett.5c00111
• Publication Date: 2025-03-19T02:14:46Z
• Authors: Yuxuan Chen; Ying Zhao; Yi Tao; Shuo Qiao; Jun Lyu; Lin Yang

Ceramic composites are essential materials for high-performance applications in aerospace, defense, and other industries requiring high-temperature structural components thermal barrier coatings. However, the understanding of heat transport processes at elevated temperatures, particularly heterogeneous interfaces, remains its early stages. In this study, we simulate properties SiC/Si interfaces various temperatures uncover an unexpected anomaly. At high interfacial resistance initially stable (consistent with Acoustic Mismatch Model, AMM) but then decreases anomalously as temperature rises, which finally reaches a plateau further increases. This behavior results from interplay between two factors: gradual melting Si, increases phonon density states overlap SiC Si interface, reduction structure factor due to loss long-range order. These effects together drive subsequent interface extreme conditions. Our findings provide new insights into complex role ultrahigh-temperature transfer offer theoretical foundation design optimization ceramic matrix next-generation management solutions environments.