Print Email Facebook Twitter Unraveling the hydrogen sulfide aging mechanism on electrical-thermal–mechanical property degradation of sintered nanocopper interconnects used in power electronics packaging Title Unraveling the hydrogen sulfide aging mechanism on electrical-thermal–mechanical property degradation of sintered nanocopper interconnects used in power electronics packaging Author Chen, Wei (Fudan University) Liu, Xu (Fudan University) Hu, D. (TU Delft Electronic Components, Technology and Materials) Liu, X. (TU Delft Electronic Components, Technology and Materials) Zhu, Xi (Fudan University; Research Institute of Fudan University, Ningbo) Fan, Xuejun (Lamar University) Zhang, Kouchi (TU Delft Electronic Components, Technology and Materials) Fan, J. (TU Delft Electronic Components, Technology and Materials; Fudan University; Research Institute of Fudan University, Ningbo) Date 2024 Abstract During operation in environments containing hydrogen sulfide (H2S), such as in offshore and coastal environments, sintered nanoCu in power electronics is susceptible to degradation caused by corrosion. In this study, experimental and molecular dynamics (MD) simulation analyses were conducted to investigate the evolution and mechanism of H2S-induced corrosion of sintered nanoCu, and bulk Cu was used as the reference. The following results are obtained: (1) Both sintered nanoCu and bulk Cu reacted with O2 prior to reacting with H2S, forming Cu2O, Cu2S, CuO, and CuS. In addition, sintered nanoCu exhibited more severe corrosion. (2) For both sintered nanoCu and bulk Cu, H2S-induced corrosion resulted in the deterioration of electrical, thermal, and mechanical properties, and sintered nanoCu experienced a greater extent of deterioration. (3) As was ascertained through Reactive Force Field (ReaxFF) MD simulations, the penetration of H2S and O2 combined with the upward migration of Cu resulted in the formation of a corrosion film. In addition, compared to bulk Cu, the H2S and O2 penetration in the sintered nanoCu structure was observed to occur to a greater depth, accounting for the more pronounced performance degradation. Subject HS corrosionPerformance degradationReaxFFShear strengthSintered nanocopper To reference this document use: http://resolver.tudelft.nl/uuid:dd1db052-8834-4c07-af2b-3fe1bdeb64a6 DOI https://doi.org/10.1016/j.matdes.2024.112702 ISSN 0264-1275 Source Materials & Design, 238 Part of collection Institutional Repository Document type journal article Rights © 2024 Wei Chen, Xu Liu, D. Hu, X. Liu, Xi Zhu, Xuejun Fan, Kouchi Zhang, J. Fan Files PDF 1-s2.0-S0264127524000741-main.pdf 12.66 MB Close viewer /islandora/object/uuid:dd1db052-8834-4c07-af2b-3fe1bdeb64a6/datastream/OBJ/view