Active brazing of C/C composites and single crystal Ni-based superalloy: Interfacial microstructure and formation mechanism

Guo, Xiang; Si, Xiaoqing; Li, Chun; Zhao, Shuhui; Liu, Yongxu; Wang, Zhiquan; He, Zongjing; Wang, Xiaoyang; Cao, Jian

doi:10.1016/j.jallcom.2021.161183

Cited by 24 publications

(7 citation statements)

References 49 publications

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“…The primary issue is the poor wettability of brazes on the C/C composites. Active elements (such as Ti and Cr) have been added to braze alloy with the purpose to improve the wettability of the brazes on the carbon substrate [11][12][13][14][15][16]. Currently active brazing alloy including Ag-Cu-Ti, Cu-Ti and Ni-Ti have been most frequently used to braze C/C composites to metals.…”

Section: Introductionmentioning

confidence: 99%

Brazing of surface modified C/C composites to Ni-based superalloy for high temperature applications

Shen,

Li,

Sheng

et al. 2024

Preprint

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In this paper, brazing of high reliability C/C composites-metal joint for high temperature application was studied. The surface of C/C composites was modified by Cr metallization process and then brazed to Ni-based superalloy by AgPd braze. Alumina block was used as interlayer and a zig-zag interfacial structure was constructed at the composites/braze interface. The results show that, after the metallization process, a strong adhesion reaction layer consisting of Cr carbides was coated on the C/C surface which in turn obviously improved the wettability of braze. The molted braze filled completely into the laser machined holes in C/C substate and well-bonded interfaces and homogeneous Ag(Pd) solution microstructure was obtained in the joint. The strength of joint with C/C metallized at 1100℃ is higher than that of joint with 1300℃. The joints exhibit very high bending strength up to 82 MPa and shear strength up to 54 MPa, respectively. The braze spikes increase the connection area and provide strong pinning effect.

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Section: Introductionmentioning

confidence: 99%

Brazing of surface modified C/C composites to Ni-based superalloy for high temperature applications

Shen,

Li,

Sheng

et al. 2024

Preprint

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“…Brazing is a simple, reliable, and efficient way to join the ceramic with metals. Among past investigations, ceramics are usually brazed with titanium alloys, stainless steels, and nickel‐based alloys for different purposes 10–13 . Various brazing fillers, including Ni‐based and Ag‐based have been widely applied.…”

Section: Introductionmentioning

confidence: 99%

“…The maximum shear strength was 43.5 MPa. AgCuTi filler was employed by Guo et al 10 . to braze C/C composites and single‐crystal Ni‐based superalloy DD3.…”

Section: Introductionmentioning

confidence: 99%

“…Among past investigations, ceramics are usually brazed with titanium alloys, stainless steels, and nickel-based alloys for different purposes. [10][11][12][13] Various brazing fillers, including Ni-based and Ag-based have been widely applied. Song et al 13 utilized BNi2 1−x Ti x to braze C f /SiC composite and GH99 superalloy.…”

Section: Introductionmentioning

confidence: 99%

“…The maximum shear strength was 43.5 MPa. AgCuTi filler was employed by Guo et al 10 to braze C/C composites and single-crystal Ni-based superalloy DD3. TiC and (Ni, Cu) 3 (Al, Ti)/(Cu, Ni)(s,s) formed on C/C side and DD3 side, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Brazing SiC ceramic to Al_0.3CoCrFeNi high‐entropy alloy using Ag–Cu filler metal

et al. 2022

Self Cite

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Realizing the joining of SiC ceramic to Al 0.3 CoCrFeNi high-entropy alloy is a technical interest for aviation, aerospace, and nuclear energy industry. In this study, the reliable brazing of SiC and Al 0.3 CoCrFeNi high-entropy alloy was realized by inactive AgCu filler, which lays the foundation for the following research on ceramic-high-entropy alloy dissimilar joining. The interfacial microstructure was characterized by a scanning electron microscope and transmission electron microscope in detail, and the influence of Al 0.3 CoCrFeNi dissolution on interfacial reactions was studied. The effect of brazing temperature on microstructure evolution and mechanical properties was discussed. The results indicated that elements Ni, Fe, Co, and Cr from Al 0.3 CoCrFeNi were crucial for the joint formation. (Ni, Fe, Co) 2 Si + graphite + Cr 23 C 6 /(Cr, Fe) 23 C 6 + (Ni, Fe, Co) 2 Si formed adjacent to SiC and (Fe, Co, Cr, Ni)-Si silicide + Cu(s,s) + Cu-Ni-Al-rich phase formed next to Al 0.3 CoCrFeNi. The reaction layers on SiC side thickened and the morphology of (Fe, Co, Cr, Ni)-Si-and Cu-Ni-Al-rich phase experienced distinct changes with the increasing temperature. The highest strength of ∼32.2 MPa was obtained at 850 • C for 10 min.

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Microstructure and mechanical properties of C/C composites/Ni superalloy dissimilar brazed joint for high-temperature applications

Shen,

Li,

Sheng

et al. 2024

Weld World

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Active brazing of C/C composites and single crystal Ni-based superalloy: Interfacial microstructure and formation mechanism

Cited by 24 publications

References 49 publications

Brazing of surface modified C/C composites to Ni-based superalloy for high temperature applications

Brazing of surface modified C/C composites to Ni-based superalloy for high temperature applications

Brazing SiC ceramic to Al_0.3CoCrFeNi high‐entropy alloy using Ag–Cu filler metal

Microstructure and mechanical properties of C/C composites/Ni superalloy dissimilar brazed joint for high-temperature applications

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Active brazing of C/C composites and single crystal Ni-based superalloy: Interfacial microstructure and formation mechanism

Cited by 24 publications

References 49 publications

Brazing of surface modified C/C composites to Ni-based superalloy for high temperature applications

Brazing of surface modified C/C composites to Ni-based superalloy for high temperature applications

Brazing SiC ceramic to Al0.3CoCrFeNi high‐entropy alloy using Ag–Cu filler metal

Microstructure and mechanical properties of C/C composites/Ni superalloy dissimilar brazed joint for high-temperature applications

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Brazing SiC ceramic to Al_0.3CoCrFeNi high‐entropy alloy using Ag–Cu filler metal