Enhancing SiC/Nb brazed joints by negative thermal expansion (Sr0.2Ba0.8)TiO3 nanoparticle-coated Cu foam

Ao Han; Gang Wang; Wei Wang; Yu Zhao; Rujie He; Caiwang Tan

doi:10.1016/j.ceramint.2025.05.164

Enhancing SiC/Nb brazed joints by negative thermal expansion (Sr_0.2Ba_0.8)TiO₃ nanoparticle-coated Cu foam

Ao Han
, Gang Wang^*
, Wei Wang
, Yu Zhao
, Rujie He^*
, Caiwang Tan

^*此作品的通讯作者

Anhui Polytechnic University
Key Laboratory of Additive Manufacturing (3D Printing) of Anhui Province
Anhui Technical College of Mechanical and Electrical Engineering
Beijing Institute of Technology
Harbin Institute of Technology

科研成果: 期刊稿件 › 文章 › 同行评审

1 引用（Scopus）

摘要

Negative coefficient of thermal expansion (Sr_0.2Ba_0.8)TiO₃ (SBT) nanoparticles are produced by ball milling and twice sintering process and coated with Cu foam (Cu_f) as an interlayer for brazing SiC and Nb. The influence of SBT content on the microstructural, shear strength, and fracture mechanism of SiC/Nb joints is investigated. In particular, SBT/Cu_f foam is utilized to modify the coefficient of thermal expansion of the AgCuTi/SBT/Cu_f/AgCuTi composite filler, resulting in a reduction of residual stresses in the joints. The residual stresses at the joints are calculated as well as analyzed the mechanism of residual stress relief by SBT. Following the introduction of the interlayer, the maximum shear strength of the joint is approximately 72 MPa, which is 164 % higher than the performance of the joint with uncoated SBT.

源语言	英语
页（从-至）	34390-34398
页数	9
期刊	Ceramics International
卷	51
期	21
DOI	https://doi.org/10.1016/j.ceramint.2025.05.164
出版状态	已出版 - 9月 2025
已对外发布	是

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10.1016/j.ceramint.2025.05.164

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@article{7e04577e62704effb91c7db5cbaa43c2,

title = "Enhancing SiC/Nb brazed joints by negative thermal expansion (Sr0.2Ba0.8)TiO3 nanoparticle-coated Cu foam",

abstract = "Negative coefficient of thermal expansion (Sr0.2Ba0.8)TiO3 (SBT) nanoparticles are produced by ball milling and twice sintering process and coated with Cu foam (Cuf) as an interlayer for brazing SiC and Nb. The influence of SBT content on the microstructural, shear strength, and fracture mechanism of SiC/Nb joints is investigated. In particular, SBT/Cuf foam is utilized to modify the coefficient of thermal expansion of the AgCuTi/SBT/Cuf/AgCuTi composite filler, resulting in a reduction of residual stresses in the joints. The residual stresses at the joints are calculated as well as analyzed the mechanism of residual stress relief by SBT. Following the introduction of the interlayer, the maximum shear strength of the joint is approximately 72 MPa, which is 164 \% higher than the performance of the joint with uncoated SBT.",

keywords = "(SrBa)TiO, Brazing, Composite filler, Residual stress",

author = "Ao Han and Gang Wang and Wei Wang and Yu Zhao and Rujie He and Caiwang Tan",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier Ltd and Techna Group S.r.l.",

year = "2025",

month = sep,

doi = "10.1016/j.ceramint.2025.05.164",

language = "English",

volume = "51",

pages = "34390--34398",

journal = "Ceramics International",

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TY - JOUR

T1 - Enhancing SiC/Nb brazed joints by negative thermal expansion (Sr0.2Ba0.8)TiO3 nanoparticle-coated Cu foam

AU - Han, Ao

AU - Wang, Gang

AU - Wang, Wei

AU - Zhao, Yu

AU - He, Rujie

AU - Tan, Caiwang

PY - 2025/9

Y1 - 2025/9

N2 - Negative coefficient of thermal expansion (Sr0.2Ba0.8)TiO3 (SBT) nanoparticles are produced by ball milling and twice sintering process and coated with Cu foam (Cuf) as an interlayer for brazing SiC and Nb. The influence of SBT content on the microstructural, shear strength, and fracture mechanism of SiC/Nb joints is investigated. In particular, SBT/Cuf foam is utilized to modify the coefficient of thermal expansion of the AgCuTi/SBT/Cuf/AgCuTi composite filler, resulting in a reduction of residual stresses in the joints. The residual stresses at the joints are calculated as well as analyzed the mechanism of residual stress relief by SBT. Following the introduction of the interlayer, the maximum shear strength of the joint is approximately 72 MPa, which is 164 % higher than the performance of the joint with uncoated SBT.

AB - Negative coefficient of thermal expansion (Sr0.2Ba0.8)TiO3 (SBT) nanoparticles are produced by ball milling and twice sintering process and coated with Cu foam (Cuf) as an interlayer for brazing SiC and Nb. The influence of SBT content on the microstructural, shear strength, and fracture mechanism of SiC/Nb joints is investigated. In particular, SBT/Cuf foam is utilized to modify the coefficient of thermal expansion of the AgCuTi/SBT/Cuf/AgCuTi composite filler, resulting in a reduction of residual stresses in the joints. The residual stresses at the joints are calculated as well as analyzed the mechanism of residual stress relief by SBT. Following the introduction of the interlayer, the maximum shear strength of the joint is approximately 72 MPa, which is 164 % higher than the performance of the joint with uncoated SBT.

KW - (SrBa)TiO

KW - Brazing

KW - Composite filler

KW - Residual stress

UR - https://www.scopus.com/pages/publications/105004926636

U2 - 10.1016/j.ceramint.2025.05.164

DO - 10.1016/j.ceramint.2025.05.164

M3 - Article

AN - SCOPUS:105004926636

SN - 0272-8842

VL - 51

SP - 34390

EP - 34398

JO - Ceramics International

JF - Ceramics International

IS - 21

ER -

Enhancing SiC/Nb brazed joints by negative thermal expansion (Sr0.2Ba0.8)TiO3 nanoparticle-coated Cu foam

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Enhancing SiC/Nb brazed joints by negative thermal expansion (Sr_0.2Ba_0.8)TiO₃ nanoparticle-coated Cu foam