One-step brazing process for CFC monoblock joints and mechanical testing

Casalegno, Valentina; Salvo, Milena; Murdaca, Stefano; Ferraris, Monica

doi:10.1016/j.jnucmat.2009.06.015

Cited by 16 publications

(7 citation statements)

References 14 publications

(21 reference statements)

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“…Thereafter, for the CFC/Cu joint a commercial non-active brazing alloy was used (87.75 wt% Cu, 12 wt% Ge and 0.25 wt% Ni; Wesgo Metals). Further details on the brazing process can be found in [3,4]. In this study samples with the flat-tile geometry including the CFC/Cu joint were produced and characterized.…”

Section: Innovative Joining Technique and Sample Preparationmentioning

confidence: 99%

“…In recent research works, some of the authors at Politecnico di Torino demonstrated the possibility of joining simultaneously CFC to Cu (or its alloys), by using one brazing alloy and heat treatment [3]. The proposed method is a simple and low-cost technique to join CFC composite to copper in both flat tile and monoblock geometries [4]. It does not require high pressure, and involves a lower temperature with respect to the joining process based on Cu casting.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of innovative CFC/Cu joints by full-field measurements and finite elements

Fedele

Ciani

Galantucci

et al. 2014

Materials Science and Engineering: A

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Section: Innovative Joining Technique and Sample Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization of innovative CFC/Cu joints by full-field measurements and finite elements

Fedele

Ciani

Galantucci

et al. 2014

Materials Science and Engineering: A

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“…The formation and quantity of brittle IMCs in brazing seam can be controlled by coated film thickness, which also avoids the problem of inhomogeneous distribution of active elements in active filler metal. At present, coating‐assisted brazing has been used to joining ceramics or composites to itself or metal 23‐25 . Piazza et al 26 joined ceramics composites to high‐temperature alloys using premetallized composite surfaces with a containing Ti or Zr filler alloy followed by brazing with a Cu layer to produce excellent joints.…”

Section: Introductionmentioning

confidence: 99%

Brazing of SiC ceramics pretreated by chromium coating using inactive AgCu filler metal

Chen

Song

et al. 2020

Int J Applied Ceramic Tech

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In this work, chromium coating conducted by magnetron sputtering was introduced to braze SiC ceramics using inactive AgCu filler metal. The results showed that reliable metallurgical bonding of SiC ceramics was obtained at 900°C for 10 minutes. SEM, XRD, and TEM were used to identify the reaction phase in the joint, and the typical interfacial microstructure was SiC/mixed CrSi 2 + Cr 23 C 6 layer/CrSi 2 / Ag(s,s)+Cu(s,s)/CrSi 2 /mixed CrSi 2 + Cr 23 C 6 layer/SiC. The shear strength of SiC joint using chromium coating brazed with inactive AgCu filler metal was 29.6 MPa and the joint fractured at the SiC substrate entirely after shear test. The proposed active element coating method provides a feasible way to achieve the brazing of ceramics.

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“…It is known that several welding methods are widely used for fabrication of copper and its alloys, such as laser welding, ion beam welding, tungsten arc inert gas welding, metal arc inert gas welding, and brazing [4,5]. Kaya et al [6] have developed a new procedure by adding an external electrical current to the conventional diffusion welding for austenitic stainless steel and copper materials.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Microstructure and Shear Strength of Brazed Cu-Cr-Zr Alloy Cylinder and Cylindrical Hole by Au Based Solder

et al. 2017

Metals

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Au-Ge-Ni solder was chosen for brazing of the Cu-Cr-Zr alloy cylinder and a part with a cylindrical hole (sleeve) below 550 • C. The Au based solder was first sintered on the surface of the cylinder and then brazed to the inner surface of the sleeve. The effects of the heating process, the temperature and the holding time at the temperature on the microstructure of the sintered layer on the surface of the cylinder, the brazed interfacial microstructure, and the brazed shear strength between the cylinder and the sleeve were investigated by scanning electron microscope, energy dispersive X-ray spectroscopy analysis, and tensile shear tests. By approach of side solder melt feeding and brazing under proper parameters, the voids and micro cracks due to a lack of enough solder melt feeding are greatly lessened and the brazed shear strength of 100 MPa is ensured even with large clearances around 0.01 mm.

show abstract

One-step brazing process for CFC monoblock joints and mechanical testing

Cited by 16 publications

References 14 publications

Characterization of innovative CFC/Cu joints by full-field measurements and finite elements

Characterization of innovative CFC/Cu joints by full-field measurements and finite elements

Brazing of SiC ceramics pretreated by chromium coating using inactive AgCu filler metal

Interfacial Microstructure and Shear Strength of Brazed Cu-Cr-Zr Alloy Cylinder and Cylindrical Hole by Au Based Solder

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