A novel approach for brazing MgF2 ceramic to TA15 alloy using AgCu/GH4169/Bi2O3B2O3ZnO composite braze fillers

IF 8.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL Journal of Materiomics Pub Date : 2024-05-22 DOI:10.1016/j.jmat.2024.04.004

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Abstract

A two-step brazing process was successfully employed to join MgF₂ ceramic and TA15 alloy using eutectic Ag28% (in mass fraction) Cu alloy and Bi₂O₃B₂O₃ZnO (BBZ) glass as fillers, by introducing a 100 μm thick GH4169 interlayer. Multiscale characterization revealed that interdiffusion and reaction occurred at the joint interfaces. As a result, a reliable joint system consisting of TA15/TiCu/TiCu₂Al/Ag(s,s) + Cu(s,s)/TiCu₂Al/TiCu Ni + Ag-rich layer/GH4169/nano-oxide layer/glass/Mg₃(BO₃)F₃+MgO + MgF₂ reaction layer/MgF₂ was formed. The GH4169-interlayer exhibited adaptive compatibility though its interaction with AgCu and BBZ glass fillers, effectively accommodating strong interface bonding and thermal mismatch stress between TA15 and MgF₂ substrates. It shows an excellent shear strength (32 MPa, at room temperature) as well as thermal cycling stability without any cracking or spallation observed after the 20 thermal shock cycles between room temperature and 300 °C. It provides valuable insights into designing highly reliable ceramic/metal joints that demonstrate superior stability and adaptability in specific applications.

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使用 AgCu/GH4169/Bi2O3-B2O3-ZnO 复合钎焊填料将 MgF2 陶瓷钎焊到 TA15 合金的新方法

使用共晶 Ag28%（质量分数）铜合金和 Bi2O3B2O3ZnO（BBZ）玻璃作为填料，通过引入 100 μm 厚的 GH4169 中间膜，成功采用两步钎焊工艺连接 MgF2 陶瓷和 TA15 合金。多尺度表征结果表明，接合界面发生了相互扩散和反应。因此，形成了由 TA15/TiCu/TiCu2Al/Ag(s,s) + Cu(s,s)/TiCu2Al/TiCu Ni + Ag-rich 层/GH4169/纳米氧化物层/玻璃/Mg3(BO3)F3+MgO + MgF2 反应层/MgF2 组成的可靠接合系统。GH4169 夹层通过与 AgCu 和 BBZ 玻璃填料的相互作用表现出适应性，能有效地适应 TA15 和 MgF2 基底之间的强界面结合和热失配应力。在室温和 300 °C 之间进行 20 次热冲击循环后，它显示出卓越的剪切强度（室温下 32 兆帕）和热循环稳定性，没有观察到任何裂纹或剥落。它为设计高可靠性的陶瓷/金属接头提供了宝贵的见解，这些接头在特定应用中表现出卓越的稳定性和适应性。

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来源期刊

Journal of Materiomics Materials Science-Metals and Alloys

CiteScore

14.30

自引率

6.40%

发文量

331

审稿时长

37 days

期刊介绍： The Journal of Materiomics is a peer-reviewed open-access journal that aims to serve as a forum for the continuous dissemination of research within the field of materials science. It particularly emphasizes systematic studies on the relationships between composition, processing, structure, property, and performance of advanced materials. The journal is supported by the Chinese Ceramic Society and is indexed in SCIE and Scopus. It is commonly referred to as J Materiomics.