Wetting and brazing of stainless steels by copper–silver eutectic

Козлова, О. В.; Voytovych, R.; Devismes, M.F.; Eustathopoulos, N.

doi:10.1016/j.msea.2007.10.101

Cited by 57 publications

(24 citation statements)

References 5 publications

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“…containing stainless steel substrates [22]. According to their results the deoxidation of the solid surface is mainly due to reduction by residual carbon present in solid steel to form carbon monoxide (CO).…”

Section: Hal-00423015 Version 1 -9 Oct 2009mentioning

confidence: 99%

Wettability of Ti3SiC2 by Ag–Cu and Ag–Cu–Ti melts

Dezellus

Voytovych

et al. 2009

J Mater Sci

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Recently, the ternary carbide Ti 3 SiC 2 has gained much attention due to its unique characteristics combining the properties of metals and ceramics (i.e., a low density, decent thermal and electrical conductivities, an excellent thermal shock resistance, a good machinability, damage tolerance, low friction and so on). The present study describes an investigation of the wettability in high vacuum of bulk Ti 3 SiC 2 by a classical braze alloy based on the Ag-Cu-Ti system. Two techniques, i.e., the sessile drop and dispensed drop methods, were utilized. The results indicated that spreading kinetics is controlled by deoxidation kinetics of Ti 3 SiC 2 surface under vacuum. The final contact angle on clean Ti 3 SiC 2 is very small (~ 10°), testifying the development of strong, metallic interactions across the liquid-solid interface. The reactivity between the ternary carbide and the liquid phase during isothermal heating at 800°C was also considered.

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Section: Hal-00423015 Version 1 -9 Oct 2009mentioning

confidence: 99%

Wettability of Ti3SiC2 by Ag–Cu and Ag–Cu–Ti melts

Dezellus

Voytovych

et al. 2009

J Mater Sci

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“…Multicomponent alloys based on the Ag-Cu eutectic are widely utilized for joining ceramics, both oxides [1] and non-oxide ones [2], as well as metallic materials [3,4] using brazing techniques. Brazing processes can be numerically simulated to assess the applicability of the brazing alloy.…”

Section: Introductionmentioning

confidence: 99%

Thermophysical Properties of Ag and Ag–Cu Liquid Alloys at 1098K to 1573K

Fima

Sobczak²

2010

Int J Thermophys

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The surface tension and density of liquid Ag and Ag-Cu alloys were measured with the sessile drop method. The sessile drop tests were carried out at temperatures from 1098 K to 1573 K, on cooling (temperature decreasing stepwise) under a protective atmosphere of high purity Ar (6N). The density of liquid Ag and Ag-Cu alloys decreases linearly with increasing temperature, and an increase in concentration of copper results in a lower density. The surface tension dependence on temperature can be described by linear equations, and the surface tension increases with increasing Cu content. The results of the measurements show good agreement with existing literature data and with thermodynamic calculations made using the Butler equation.

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“…In this study, commercially available Cu-Ag-Ti and Cu-Ag-In-Ti braze alloys were obtained and used to join 316L stainless steel samples. It should be noted that oxide layers on stainless steel, including 316L, can act as a barrier to wetting, resulting in lower degrees of wettability for the braze [7]. The indium additions (~12%) present in the Cu-Ag-In-Ti braze lower the metal surface tension [8].…”

Section: Introductionmentioning

confidence: 99%

Microgalvanic Corrosion Behavior of Cu-Ag Active Braze Alloys Investigated with SKPFM

Kvryan¹,

Livingston²,

Efaw³

et al. 2016

Metals

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Abstract:The nature of microgalvanic couple driven corrosion of brazed joints was investigated. 316L stainless steel samples were joined using Cu-Ag-Ti and Cu-Ag-In-Ti braze alloys. Phase and elemental composition across each braze and parent metal interface was characterized and scanning Kelvin probe force microscopy (SKPFM) was used to map the Volta potential differences. Co-localization of SKPFM with Energy Dispersive Spectroscopy (EDS) measurements enabled spatially resolved correlation of potential differences with composition and subsequent galvanic corrosion behavior. Following exposure to the aggressive solution, corrosion damage morphology was characterized to determine the mode of attack and likely initiation areas. When exposed to 0.6 M NaCl, corrosion occurred at the braze-316L interface preceded by preferential dissolution of the Cu-rich phase within the braze alloy. Braze corrosion was driven by galvanic couples between the braze alloys and stainless steel as well as between different phases within the braze microstructure. Microgalvanic corrosion between phases of the braze alloys was investigated via SKPFM to determine how corrosion of the brazed joints developed.

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Wetting and brazing of stainless steels by copper–silver eutectic

Cited by 57 publications

References 5 publications

Wettability of Ti3SiC2 by Ag–Cu and Ag–Cu–Ti melts

Wettability of Ti3SiC2 by Ag–Cu and Ag–Cu–Ti melts

Thermophysical Properties of Ag and Ag–Cu Liquid Alloys at 1098K to 1573K

Microgalvanic Corrosion Behavior of Cu-Ag Active Braze Alloys Investigated with SKPFM

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