Evaluation of thermal anisotropic evolution in the sinter structure of direct sinter joining to silicon via coupled microstructural characterizations

Matsuda, Tomoki; Seo, Ryotaro; Takeuchi, Akihisa; Uesugi, Kentaro; Yasutake, Masahiro; Kambara, Makoto; Hirose, Akio

doi:https://doi.org/10.1016/j.msea.2024.147692

Evaluation of thermal anisotropic evolution in the sinter structure of direct sinter joining to silicon via coupled microstructural characterizations

Matsuda, Tomoki; Seo, Ryotaro; Takeuchi, Akihisa et al.

Materials Science and Engineering: A, 2025, 923, 147692

アクセス数:831件（2025-08-14 21:18 集計）

固定URL: https://hdl.handle.net/11094/100388

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タイトル	Evaluation of thermal anisotropic evolution in the sinter structure of direct sinter joining to silicon via coupled microstructural characterizations
著者	NRID 1000030756333 1000030756333 ORCID 0000-0002-3978-0118 0000-0002-3978-0118 researchmap permalink tomokimatsuda tomokimatsuda Scopus Author ID 56430312900 56430312900 著者名 Matsuda, Tomoki
	著者名 Seo, Ryotaro
	NRID 1000070426526 1000070426526 著者名 Takeuchi, Akihisa
	NRID 1000080344399 1000080344399 著者名 Uesugi, Kentaro
	NRID 1000000852188 1000000852188 著者名 Yasutake, Masahiro
	NRID 1000080359661 1000080359661 researchmap permalink pme305 pme305 著者名 Kambara, Makoto
	NRID 1000070144433 1000070144433 researchmap permalink read0014056 read0014056 Scopus Author ID 7102226286 7102226286 著者名 Hirose, Akio
キーワード等	Ag/Si sintered joint
	Fracture morphology
	Microscale tensile test
	Nano-CT
	Thermal storage
内容	Matsuda T., Seo R., Takeuchi A., et al. Evaluation of thermal anisotropic evolution in the sinter structure of direct sinter joining to silicon via coupled microstructural characterizations. Materials Science and Engineering: A 923, 147692 (2025); https://doi.org/10.1016/j.msea.2024.147692.
抄録	Sinter joining is vital for developing next-generation power devices, and therefore, the joining properties of suitable materials such as fine metal particles have drawn considerable research attention. The evolution of the sinter structure and its relationship to the joint strength has previously been studied in terms of pore size, porosity, and grain size; however, its link to fracture morphology remains ambiguous, especially for dissimilar interfaces. In this study, the effect of the anisotropic microstructural evolution of an Ag/Si sintered joint on fracture behavior and joint strength during thermal storage at 250 °C was investigated. A coupled approach involving two-dimensional (2D) characterization based on cross-sectional observation and three-dimensional (3D) characterization rooted in X-ray nano-computed tomography was devised for clarifying the relationship between the thermal storage and macroscale/microscale fracture behaviors of a joint. A steep decrease in joint strength occurred at the initial stage of thermal storage; however, high durability with a joint strength greater than 40 MPa was maintained even after thermal storage for 1000 h. The 2D and 3D analyses reveal identical microstructural evolutions with respect to the anisotropic movement of Ag, oxygen-containing Ag, and pores in the sintered structure. Furthermore, microscale tensile tests show a marked decrease in local strength in the sintered layer because of the formation of large voids. Pore aggregation is found to dominate the anisotropic microstructural evolution and play a significant role in determining the fracture behavior and macroscale properties of Ag/Si sintered joints.
出版者	Elsevier Ltd
収録物名	Materials Science and Engineering: A
巻(号)	923
ページ	147692
刊行年月	2025-02-01
言語	英語
ハンドルURL	https://hdl.handle.net/11094/100388
PISSN	09215093
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1016/j.msea.2024.147692
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCTERMS.bibliographicCitation	Materials Science and Engineering: A. 2025, 923, p. 147692
DC.title	Evaluation of thermal anisotropic evolution in the sinter structure of direct sinter joining to silicon via coupled microstructural characterizations
DC.creator	Matsuda, Tomoki
	Seo, Ryotaro
	Takeuchi, Akihisa
	Uesugi, Kentaro
	Yasutake, Masahiro
	Kambara, Makoto
	Hirose, Akio
DC.publisher	Elsevier Ltd
DC.language' scheme='DCTERMS.RFC1766	英語
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2025-02-01
DC.identifier	https://doi.org/10.1016/j.msea.2024.147692
DC.subject	Ag/Si sintered joint
	Fracture morphology
	Microscale tensile test
	Nano-CT
	Thermal storage
DC.description	Matsuda T., Seo R., Takeuchi A., et al. Evaluation of thermal anisotropic evolution in the sinter structure of direct sinter joining to silicon via coupled microstructural characterizations. Materials Science and Engineering: A 923, 147692 (2025); https://doi.org/10.1016/j.msea.2024.147692.
DCTERMS.abstract	Sinter joining is vital for developing next-generation power devices, and therefore, the joining properties of suitable materials such as fine metal particles have drawn considerable research attention. The evolution of the sinter structure and its relationship to the joint strength has previously been studied in terms of pore size, porosity, and grain size; however, its link to fracture morphology remains ambiguous, especially for dissimilar interfaces. In this study, the effect of the anisotropic microstructural evolution of an Ag/Si sintered joint on fracture behavior and joint strength during thermal storage at 250 °C was investigated. A coupled approach involving two-dimensional (2D) characterization based on cross-sectional observation and three-dimensional (3D) characterization rooted in X-ray nano-computed tomography was devised for clarifying the relationship between the thermal storage and macroscale/microscale fracture behaviors of a joint. A steep decrease in joint strength occurred at the initial stage of thermal storage; however, high durability with a joint strength greater than 40 MPa was maintained even after thermal storage for 1000 h. The 2D and 3D analyses reveal identical microstructural evolutions with respect to the anisotropic movement of Ag, oxygen-containing Ag, and pores in the sintered structure. Furthermore, microscale tensile tests show a marked decrease in local strength in the sintered layer because of the formation of large voids. Pore aggregation is found to dominate the anisotropic microstructural evolution and play a significant role in determining the fracture behavior and macroscale properties of Ag/Si sintered joints.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	100388
citation_title	Evaluation of thermal anisotropic evolution in the sinter structure of direct sinter joining to silicon via coupled microstructural characterizations
citation_author	Matsuda, Tomoki
	Seo, Ryotaro
	Takeuchi, Akihisa
	Uesugi, Kentaro
	Yasutake, Masahiro
	Kambara, Makoto
	Hirose, Akio
citation_publisher	Elsevier Ltd
citation_language	英語
citation_date	2025-02-01
citation_journal_title	Materials Science and Engineering: A
citation_volume	923
citation_firstpage	147692
citation_doi	https://doi.org/10.1016/j.msea.2024.147692
citation_public_url	https://hdl.handle.net/11094/100388

Evaluation of thermal anisotropic evolution in the sinter structure of direct sinter joining to silicon via coupled microstructural characterizations

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