Correlation between the mechanical properties and the microstructural behaviour of Al2O3–(Ag–Cu–Ti) brazed joints

Mandal, Sudipta; Ray, Ashok K; Ray, Ajoy Kumar

doi:10.1016/j.msea.2004.06.002

Cited by 93 publications

(39 citation statements)

References 13 publications

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“…This value can be considered satisfactory as compared to those obtained in the literature where the average mechanical resistance of brazed joints are around 120 MPa 3,4,12,13 , and the greatest value reached…”

Section: The Hollow Cathode Discharge Sputtering Techniquesupporting

confidence: 69%

“…Mandal 4 also identified that brazing temperatures above 950 °C can reduce the thickness of the residual Ag-Cu which can avoid crack nucleation in Al 2 O 3 brazed joint. Figure 4 presents the higher FR increase values (from 127 to 177 MPa) which occurred when layer thickness was increased from …”

Section: Discussionmentioning

confidence: 99%

“…AgCuTi alloys are the most widely used filler alloys for Al 2 O 3 brazing, with Ti acting as active metals promoting the union by forming a reaction layer at the ceramic surface increasing the wetting behavior. [4][5][6] In the case of the indirect brazing, the previous metallization allows the wetting of the ceramic substrate without the introduction of an active metal in the filler alloy. This leads to a reduction of the processing cost.…”

Section: Introductionmentioning

confidence: 99%

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Deposition of thin film of titanium on ceramic substrate using the discharge for hollow cathode for Al2O3/Al2O3 indirect brazing

Marinho¹,

Maciel

Castro

et al. 2009

Mat. Res.

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Thin films of titanium were deposited onto Al 2 O 3 substrate by hollow cathode discharge method for the formation of a ceramic-ceramic joint using indirect brazing method. An advantage of using this technique is that a relatively small amount of titanium is required for the metallization of the ceramic surface when compared with other conventional methods. Rapidly solidified brazing filler of Cu 49 Ag 45 Ce 6 in the form of ribbons was used. The thickness of deposited titanium layer and the brazing temperature/time were varied. The quality of the brazed joint was evaluated through the three point bending flexural tests. The brazed joints presented high flexural resistance values up to 176 MPa showing the efficiency of the technique.

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Section: The Hollow Cathode Discharge Sputtering Techniquesupporting

confidence: 69%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Deposition of thin film of titanium on ceramic substrate using the discharge for hollow cathode for Al2O3/Al2O3 indirect brazing

Marinho¹,

Maciel

Castro

et al. 2009

Mat. Res.

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“…However, it is noted that the BAg filler metal exhibits better thermal and eutectic properties due to the presence of Ag in this filler metal. [1][2][3]10 Therefore, the alloy of the BAg series containing 65%Ag-Bal.-Cu is used in this investigation as the BFM. The shape of the BFM used in the investigation is wire-type.…”

Section: Selection Of Brazing Filler Metalmentioning

confidence: 99%

Optimization of brazing conditions for OFHC Cu and ASTM A501 low carbon steel by taguchi method

Wang

Afsar

Song

2009

Int. J. Precis. Eng. Manuf.

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NOMENCLATUREAdj MS = adjusted means squares Adj SS = adjusted sums of squares ANOM = analysis of means ANOVA = analysis of variance DF = degree of freedom F = F-statistic GLM = general linear model k = design parameter l = number of levels m = overall mean value N = total number of levels n = number of designed experiments Seq SS = sequential sums of squares SS k = sum of squares due to parameter k SS T = total sum of squares y i = i-th value of shear strength η = signal to noise (S/N) ratio This paper concerns the optimization of brazing conditions for joining the two dissimilar materials Oxygen-free high conductivity (OFHC) copper and ASTM A501 low carbon steel usually used for an Oil-Separator of an airconditioner using Ag-based (BAg) alloy as a brazing filler metal (BFM). A mixture of 70% N 2 and 30% H 2 gases was used to prevent oxidation of the joints during furnace brazing process. Brazing joint clearance, length, temperature, and time were selected as design parameters that have significant effect on the bonding strength of a brazed joint. Taguchi method was used as a statistical technique for design of experiment (DOE) in an attempt to optimize brazing conditions in terms of shear strength. L 9 (3 4 ) orthogonal array was designed for conducting the experiments. The relative influence of design parameters and their interaction on the response were also discussed. The experimental results verified that the brazing conditions predicted in this study by Taguchi method could produce the brazed joint between OFHC copper and ASTM A501 low carbon steel with maximum shear strength.

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“…Due to the metallic matrix of noble metals, good ductility, strength, and high corrosion resistance of the joints are expected. A solidus temperature commonly higher than 930°C permits high-temperature applications [1][2][3][6][7][8][9][10][11]. In this study, RAB was applied to produce ceramic-to-ceramic and (for SOFC applications) ceramic-to-metal joints.…”

Section: Introductionmentioning

confidence: 99%

Brazing of ceramic-to-ceramic and ceramic-to-metal joints in air

Bobzin

Schlaefer

Zhao

et al. 2010

Front. Mech. Eng. China

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Reactive air brazing (RAB) is an emerging technology for the production of ceramic-to-ceramic and ceramic-to-metal joints. In this study, RAB was investigated with respect to the potential applications for solid oxide fuel cells (SOFCs) as one example of use. It was found that alumina could be well brazed by RAB with AgCu and AgCuTi brazes. Both braze composition and brazing temperature influenced significantly the wetting behavior and their mechanism of wetting. AgCu and AgCuTi braze alloys could also be used to produce brazed joints with the SOFC materials ceramic yttria stabilized zirconia and steel X1CrTiLa22. However, CuO reacts with the steel, forming a brittle oxide layer on the steel surface, which is undesirable for SOFC applications. The first trials with Ag0.5Al showed a promising solution.

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Correlation between the mechanical properties and the microstructural behaviour of Al2O3–(Ag–Cu–Ti) brazed joints

Cited by 93 publications

References 13 publications

Deposition of thin film of titanium on ceramic substrate using the discharge for hollow cathode for Al2O3/Al2O3 indirect brazing

Deposition of thin film of titanium on ceramic substrate using the discharge for hollow cathode for Al2O3/Al2O3 indirect brazing

Optimization of brazing conditions for OFHC Cu and ASTM A501 low carbon steel by taguchi method

Brazing of ceramic-to-ceramic and ceramic-to-metal joints in air

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