Microstructure and mechanical properties of Ni foam/stainless steel joint brazed using Ni-based alloy

Heo, Hoejun; Kim, Gyulin; Kim, Dae Yeon; Moon, Chang-Kwon; Kim, Kyung Chun; Jung, Kyu Yong; Kang, Chung Gil

doi:10.1016/j.msea.2018.10.022

Cited by 13 publications

(5 citation statements)

References 24 publications

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“…The compressive strength of Cu/Cu foam/Cu is needed to accommodate strong mass fluid flow during heat exchanger operation. While the shear strength determines the contact joining quality between substrate and the foam which affect the thermal conduction due to the thermal resistance at the joining interface (Heo et al, 2019). The highest compressive strength values obtained ranged from 10 to 12 MPa at 720°C.…”

Section: Discussionmentioning

confidence: 99%

“…However, research on the deformation behavior of metal foam is still scarce. Hence, the aims of this study are to investigate the deformation behavior through a 1) compressive strength of Cu/Cu foam/Cu which will accommodate a strong mass fluid flow during heat exchanger operation and 2) shear strength of Cu/Cu foam joining which may affect the thermal conduction due to the thermal resistance at the joining interface (Heo et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Deformation and Fracture Behavior of Sandwiched Copper Foam Brazed Joint Using Amorphous Copper–Tin–Nickel–Phosphorus Filler

et al. 2021

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Utilization of open-cell metal foams in functional applications such as in energy absorption, noise absorber, heat insulator, and lightweight panels is trending in many industrial applications. The development of reliable joining technologies for sandwiched metal foams is crucial for thermal application and one of the techniques used is brazing process. In the current work, copper foam was sandwiched between a copper plate using amorphous filler of Cu-9.7Sn-5.7Ni-7.0P (Cu: copper, Sn: tin, Ni: nickel, and P: phosphorus) via brazing technique. The shear test was conducted on the brazed joint interface of copper/copper foam, while the compressive test was carried out on the brazed sample. Microstructures of the copper substrate surface obtained from the shear fracture of brazed copper/copper foam show the tear region and cleavage fractures. The stress–strain curve of shear and compressive strength explains the deformation behavior of the brazed sample.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Deformation and Fracture Behavior of Sandwiched Copper Foam Brazed Joint Using Amorphous Copper–Tin–Nickel–Phosphorus Filler

et al. 2021

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“…The shear strength plays a vital role in brazing porous Ni to Cu and SS304. The shear strength tests determine the contact joining quality between the base metals and the porous metal which affects the thermal conduction due to the thermal resistance at the joining interface [30]. Besides, the shear strength condition applied in heat exchanger applications is less likely to be fouled.…”

Section: Shear Strength Analysismentioning

confidence: 99%

Brazing of Porous Nickel to Copper and Stainless Steel: Microstructure and Mechanical Properties

Zaharinie,

Ikmal,

Rozaimay

et al. 2024

KEM

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A porous nickel (Ni) was brazed to copper (Cu) and stainless steel 304 (SS304) using VZ2250 and MBF67 brazing filler metal with a composition of 77.4Cu-9.3Sn-7.0Ni-6.3P and 64.5Ni-25Cr-6P-1.5Si (Cu: Copper, Sn: Tin, Ni: Nickel, P: Phosphorus, Cr: Chromium, Si: Silicon), respectively for joint microstructure and mechanical properties analysis. Porous Ni with a pore density of 15 pores per inch (PPI) was sandwiched between Cu/VZ2250 and MBF67/SS304. A brazed joint of Cu/Porous Ni/SS304 with VZ2250 and MBF67 brazing filler metal was prepared in a high vacuum furnace at different brazing times of 5, 10, and 15 minutes for 1015 °C with a heating and cooling rate of 10 °C/min, respectively for comparison purpose. The microstructure and mechanical properties of the brazed joint were investigated to identify the joint ability after the brazing process. Scanning Electron Microscope (SEM) equipped with Energy Dispersive X-Ray Spectroscopy (EDS) confirmed the interfacial microstructure by the formation of the diffusion filler metal (dark grey colour) for the Cu/Porous Ni/SS304 with VZ2250 and MBF67 brazing filler metal. For shear strength tests, the value decreases with an increase in the brazing time. The shear strength tests for the brazed joint of Cu/Porous Ni/SS304 with VZ2250 and MBF67 brazing filler metal show the maximum shear strength test value can be achieved for the brazing time of 5 minutes. The decreasing shear strength value was observed with differences in structural data of porous Ni due to the softening after the brazing process. Keywords: Brazing, Microstructure, Porous Nickel, Shear Strength.

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“…Filler metals therefore play a significant role in brazing and soldering, and are likely to have a very different composition to the materials they are used with. Selection of filler metals depends on a multitude of factors, e.g., the parent materials, service conditions, joint design and required filler metal form, the brazing process and temperature, as well as various legal requirements and regulations which may apply to specific situations [ 7 , 8 , 9 , 10 ]. As a result, although selection criteria will vary with application, they often include melting characteristics (the solidus and liquidus temperatures and the melting range), wetting (which can be more complex for ceramic-ceramic joining [ 11 ] or metal-ceramic joining [ 11 ]) and flow.…”

Section: Introductionmentioning

confidence: 99%

“…To overcome such limitations, other solders, such as those based on the Sn-In eutectic, have been explored. These exhibit excellent ductility, flexibility, and high thermal and electrical conductivity, and are regarded as promising materials for soldering heat sink components for flexible devices [ 7 ]. However, their relatively low mechanical strength and melting temperature still need improvement for more effective use in areas such as flexible interconnection applications, and this has led to the exploration of some complex compositions.…”

Section: Introductionmentioning

confidence: 99%

High Entropy Alloys as Filler Metals for Joining

Luo

Xiao

Hardwick

et al. 2021

Entropy

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In the search for applications for alloys developed under the philosophy of the High Entropy Alloy (HEA)-type materials, the focus may be placed on applications where current alloys also use multiple components, albeit at lower levels than those found in HEAs. One such area, where alloys with complex compositions are already found, is in filler metals used for joining. In soldering (<450 °C) and brazing (>450 °C), filler metal alloys are taken above their liquidus temperature and used to form a metallic bond between two components, which remain both unmelted and largely unchanged throughout the process. These joining methods are widely used in applications from electronics to aerospace and energy, and filler metals are highly diverse, to allow compatibility with a broad range of base materials (including the capability to join ceramics to metals) and a large range of processing temperatures. Here, we review recent developments in filler metals relevant to High Entropy materials, and argue that such alloys merit further exploration to help overcome a number of current challenges that need to be solved for filler metal-based joining methods.

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Microstructure and mechanical properties of Ni foam/stainless steel joint brazed using Ni-based alloy

Cited by 13 publications

References 24 publications

Deformation and Fracture Behavior of Sandwiched Copper Foam Brazed Joint Using Amorphous Copper–Tin–Nickel–Phosphorus Filler

Deformation and Fracture Behavior of Sandwiched Copper Foam Brazed Joint Using Amorphous Copper–Tin–Nickel–Phosphorus Filler

Brazing of Porous Nickel to Copper and Stainless Steel: Microstructure and Mechanical Properties

High Entropy Alloys as Filler Metals for Joining

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