Journal articles: 'Silver brazing'

1

Nagano, Toshiki, and Toshiyasu Takei. "Brazing Technology with Silver Brazing Paste." Indian Welding Journal 22, no. 4 (October 1, 1990): 162. http://dx.doi.org/10.22486/iwj.v22i4.148369.

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2

Fang, Wei Ping, Yao Yong Yi, Feng Mei Liu, Zheng Lin Liu, and Zhen Hua Deng. "Research and Preparation of Silver Free Amorphous Active Brazing Alloy." Materials Science Forum 817 (April 2015): 96–103. http://dx.doi.org/10.4028/www.scientific.net/msf.817.96.

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A silver free amorphous Cu-35Ti-12Ni active brazing alloy was successfully prepared in this work. The crystallinity, microstructure, and chemical composition were characterized with X-ray diffraction (XRD), scanning electron microscope (SEM), and energy-dispersive spectrometry (EDS), respectively. A typical characteristic peak of amorphous material was observed in the XRD pattern. The microstructures and chemical compositions of the silver free amorphous alloy were uniform. Differential scanning calorimetry (DSC) result shows that the amorphous silver free brazing alloy has higher melting temperature than commercial silver brazing alloy (Ag-26.5Cu-1.5Ti). Wetting contact angle and spreading area on Si3N4 ceramic substrate were used to evaluate the wetting ability of brazing alloy. The wetting angle was smaller than 5o, and the spreading area was 141.6 mm2 at 1100°C. The bending strength of silver free brazing alloy/Si3N4 was also carried out. The mechanical test shows that the amorphous Cu-35Ti-12Ni/Si3N4 has higher joint strength (304.7MPa) than the crystal Cu-35Ti-12Ni/Si3N4 (294.7MPa) at room temperature.

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3

Dirnfeld, S. F., R. Gabbay, J. J. Ramon, and H. J. Wagner. "Copper embrittlement by silver brazing alloys." Materials Characterization 26, no. 1 (January 1991): 17–22. http://dx.doi.org/10.1016/1044-5803(91)90004-n.

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4

Binchiciu, Emilia, Traian Fleșer, and Ionelia Voiculescu. "Composite Rods for Brazing." Advanced Materials Research 1029 (September 2014): 72–77. http://dx.doi.org/10.4028/www.scientific.net/amr.1029.72.

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The paper presents research conducted for the development of precursors and wrapped rods for brazing, that deposit, through melting, two different alloys, with respect to the level of silver alloying and the melting temperature. The alloy with the high silver content is introduced under the form of powder, in the coating of the brazing rods, in a participation proportion that assures a buffer layer, with advance proprieties of diffusion in the base metal and in the core alloy of the coated rod. The participation ratio of the silver rich powder alloy is established within the following limits 8-12%, depending on their melting point, the grinding degree and mixing with the deoxidizer coat. The development of the precursors was made by homogeneous melting and spraying on a oblique plan, the grains obtained were grounded, the grist obtained is considered optimum to be introduced in the coating mixture after it successfully passed through a sieve with a mesh of 0.1 mm. The alloyed precursors with 45% silver, grounded between the above mentioned limits, were introduced in the deoxidizer coat mixture af the bare rods type Ag30 according to SR EN 1044/1999. The resulted mixture was used to manufacture experimental lots of covered rods for brazing, which were used for testing, in order to achieve highly important joints. The melting temperature of the precursors was established through micro-alloying so that it will be 10-15°C higher than that of the deoxidizer coat, which in turn has a lower melting temperature, by 56-60°C, than the melting temperature of the core alloy. The deoxidizer coat is usually fluoroboric type, conforming to SR EN 1045/2001. Representative joints made with the new experimental rods, after testing, presented results consistent with the requirements, which allowed the authors to appreciate this method as appropriate for cost reduction with brazing materials in the use of composite coated rods.

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5

Fokanov, A. N., V. F. Podurazhnaya, A. V. Tebyakin, and V. S. Kaskov. "Brazing the beryllium window in copper frame by silver brazing alloy." Proceedings of VIAM, no. 11 (November 2016): 1. http://dx.doi.org/10.18577/2307-6046-2016-0-11-1-1.

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6

Winiowski, A., and M. Rózanski. "Impact of Tin and Nickel on the Brazing Properties of Silver Filler Metals and on the Strength of Brazed Joints Made of Stainless Steels." Archives of Metallurgy and Materials 58, no. 4 (December 1, 2013): 1007–11. http://dx.doi.org/10.2478/amm-2013-0118.

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Abstract The research involved vacuum tests of brazing properties of silver filler metals, containing tin as well as tin and nickel, and used in brazing of chromium X6Cr17 and chromium-nickel X6CrNiTi18-10 stainless steels. The research also involved testing the strength and structural properties of brazed joints made of these steels. The tests were conducted on filler metals (silver brazing alloys) B-Ag68CuSn-730/755 (Ag68Cu28Sn4) and B-Ag65CuSnNi-740/767 (Ag65Cu28Sn5Ni2) and also, for comparative purposes, on the filler metal B-Ag72Cu-780 (Ag 272 according to PN-EN ISO 17672), most commonly applied in the vacuum brazing of high alloyed stainless steels. The brazing properties of the filler metals were tested by determining their wettability by means of the spreadability method. The strength of brazed joints made of the stainless steels was examined in a shear test. Research-related structural tests involved light and electron microscopy with an energy dispersive spectrometer (EDS). The comparative analysis of the properties of the filler metals revealed the positive impact of tin and nickel on the spreadability and wettability of the silver brazing alloys as well as on the quality and the shear strength of brazed joints.

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7

Karpiński, Marcin. "Silver Based Brazing Composites for Trimetalic Components." Key Engineering Materials 641 (April 2015): 99–104. http://dx.doi.org/10.4028/www.scientific.net/kem.641.99.

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The paper presents the aspects of trimets manufacturing related to raising quality and economic demands. The comparison of two types of alloys used as a filler metal has been performed. Modification of the chemical composition of brazing alloy, currently used for trimet composite strips in terms of lower silver contents has been proposed. The joining of conventional cemented carbides with steel has been investigated.

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8

Leach, Robert H., and Leo Edelson. "SILVER BRAZING ALLOYS IN THE MARINE FIELD." Journal of the American Society for Naval Engineers 51, no. 1 (March 18, 2009): 56–79. http://dx.doi.org/10.1111/j.1559-3584.1939.tb01452.x.

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9

Berezhnyy, Stanislav, Oleksii Kapustian, Ruslan Kulykovskyi, Ihor Avdeev, and Danylo Uriekin. "Development of resource-saving and environmentally safe beryllium bronze soldering technology." Scientific journal of the Ternopil national technical university 100, no. 4 (2020): 46–54. http://dx.doi.org/10.33108/visnyk_tntu2020.04.046.

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The composition of the solder, which provides the necessary technological properties of the product, namely, electrical conductivity and mechanical strength of the junction was selected. The possibility of brazing beryllium bronze with a silver contact plate by furnace brazing using fluxes based on NaCl: CaCl2: CaF2 salts, respectively (24: 61: 15% mass) in the atmosphere was established. The possibility of brazing BrB2 beryllium bronze in the atmosphere using a research flux based on the eutectic of the NaCl – CaCl2 system (28…72% wt.) adding 15% CaF2 over a copper layer is shown. The technology for brazing beryllium bronze BrB2 with silver contact plates with silver solder PSr68 has been developed. The brazing process is combined with the hardening operation, which allows avoiding additional thermal operations; flux residues are removed during hardening and do not actually need additional cleaning operations; applied solder, flux components and technologies for applying a layer of copper are not scarce and relatively cheap, which can significantly reduce the cost of the product, subject to the requirements of the technical specifications. A technological process that makes it possible to refuse of using vacuum systems and toxic fluxes has been developed.

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10

Podsiadło, Marcin, Lucyna Jaworska, and Piotr Klimczyk. "Direct brazing of diamond to the tool body – brazing binders and methods." Mechanik 92, no. 8-9 (September 9, 2019): 520–23. http://dx.doi.org/10.17814/mechanik.2019.8-9.63.

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The article presents the problem of direct brazing of diamond to the tool body. The greatest threats to the brazing joint were discussed: stress and poor wettability. Methods for producing polycrystalline diamond blanks by various methods were presented. The metal alloys (solders) with a silver, nickel and copper matrix that is used for brazing diamonds were described. The most commonly used brazing methods (resistance, induction, laser and infrared) were discussed.

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11

Lee, Cheng-Han, and Ren-Kae Shiue. "Infrared Brazing Zirconium using Two Silver Based Foils." Journal of Materials Science & Technology 29, no. 3 (March 2013): 283–86. http://dx.doi.org/10.1016/j.jmst.2013.01.010.

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12

Dev, S. C., and C. S. Sivaramakrishnan. "An indigenous technology for a silver brazing alloy." Materials & Design 17, no. 2 (January 1996): 75–78. http://dx.doi.org/10.1016/s0261-3069(96)00035-0.

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13

TILLEARD, JAMES. "Fatal fluoride toxicity from silver brazing flux ingestion." Emergency Medicine 6, no. 1 (August 26, 2009): 12–16. http://dx.doi.org/10.1111/j.1442-2026.1994.tb00431.x.

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14

Shiue, R. K., S. K. Wu, and S. Y. Chen. "Infrared brazing of TiAl intermetallic using pure silver." Intermetallics 12, no. 7-9 (July 2004): 929–36. http://dx.doi.org/10.1016/j.intermet.2004.02.006.

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15

Dev, S. C., and O. N. Mohanty. "Rapidly solidified low-silver brazing filler alloy foils." Journal of Materials Science 29, no. 23 (December 1994): 6329–34. http://dx.doi.org/10.1007/bf00354579.

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16

Zheng, Zhi Hua, Dai Hua Yang, and Yan Shen Wang. "The Application of Vacuum Power for Drill Automatic Welding Device." Applied Mechanics and Materials 602-605 (August 2014): 1340–43. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.1340.

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In this paper, a vacuum suction cup robot is introduced, which is used in drill bolt welding machine to add silver brazing sheets. This paper briefly discusses the application of vacuum power on the device. Then through the selection of the degree of vacuum and a vacuum generator, the selection and calculation of the chuck size specify the design process of the vacuum power system. Finally, through the working process of the manipulator and the structural design of the silver brazing box briefly introduce the movement of the vacuum suction manipulator.

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17

Fukikoshi, Tatsuya, Yūki Watanabe, Yasuyuki Miyazawa, and Fumio Kanasaki. "Brazing of copper to stainless steel with a low-silver-content brazing filler metal." IOP Conference Series: Materials Science and Engineering 61 (August 1, 2014): 012016. http://dx.doi.org/10.1088/1757-899x/61/1/012016.

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18

Dudina, Dina, Alexander Matvienko, Anatoly Sidelnikov, Mikhail Legan, Vyacheslav Mali, Maksim Esikov, Alexander Anisimov, Pavel Gribov, and Vladimir Boldyrev. "Electric Current-Assisted Joining of Copper Plates Using Silver Formed by In-Situ Decomposition of Ag2C2O4." Metals 8, no. 7 (July 12, 2018): 538. http://dx.doi.org/10.3390/met8070538.

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Pulsed electric current can be used for the fast sintering of powders as well as joining of macroobjects. In this work, we brazed copper plates using a silver layer that was formed in situ by the decomposition of a silver oxalate Ag2C2O4 powder placed between the plates. Joining was conducted in the chamber of a Spark Plasma Sintering (SPS) facility with and without a graphite die. In the die-assisted tooling configuration, indirect heating of the assembly from the graphite die carrying electric current occurred until the brazing layer transformed into metallic silver. The passage of electric current through a Cu/Ag2C2O4/Cu stack placed between the electrodes without a die was possible because of the formation of Cu/Cu contacts in the areas free from the Ag2C2O4 particles. Joints that were formed in the die-assisted experiments showed a slightly higher shear strength (45 MPa) in comparison with joints formed without a die (41 MPa). The shear strength of the reference sample (obtained without a die), a stack of copper plates joined without any brazing layer, was only 31 MPa, which indicates a key role of the silver in producing strong bonding between the plates. This study shows that both die-assisted tooling configurations and those without a die can be used for the SPS brazing of materials by the oxalate-derived silver interlayer.

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19

Wiewiórowska, Sylwia, Zbigniew Muskalski, and Maciej Suliga. "Analysis of Rolling Process for Alloy on the Base of Silver BAg7." Solid State Phenomena 165 (June 2010): 221–25. http://dx.doi.org/10.4028/www.scientific.net/ssp.165.221.

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The variety of industrial use of brazing solders is associated in one way with plastic properties (more plastic materials are producing in the form of wires, sheets, bands, metal leafs, meshes etc, low plastic materials in the form: pig sows, bars, powders) and in another way with the kind of joining and use soldering or brazing method. Hard solders, which include analyzed solder BAg7, have a very wide range of melting points (from 400 to 2000°C) and are applied in those cases when very high values of strength are required for soldered joint. The research was carried out for the silver-based solder designated as Bag7 according to American Standard ANSI/AWSA 5.8-92. This solder has a typical application for the brazing process of food handling equipment requiring low melting values and for brazing aluminium alloys. In the literature, except for chemical composition and temperature of brazing, we cannot find the details concerned with the method of plastic working of BAg7. In the reported research work the metallographic analysis of rolling process was performed and optimal parameters of rolling process for the considered solder were determined.

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20

Wang, Bo, Weimin Long, Mengfan Wang, Pengzhi Yin, Shaokang Guan, Sujuan Zhong, and Songbai Xue. "Research Progress in Relation to Composite Brazing Materials with Flux." Crystals 11, no. 9 (August 30, 2021): 1045. http://dx.doi.org/10.3390/cryst11091045.

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Brazing was one of the earliest material-joining methods to be invented and widely used by humans. In the past 30 years, the technology and materials employed for brazing have developed rapidly and continuously. With the rise of the international new industrial revolution, the manufacturing industry is moving towards diversification, and brazing filler metals are also evolving in the direction of eco-friendliness, compounding and diversification. In the “carbon neutral” environment of 2021, green composite brazing materials will become mainstream. In this paper, the classification and characteristics of flux-containing brazing materials are summarized, and the preparation technology, composition design and typical application of composite brazing materials such as flux-cored brazing filler metal, flux-coated brazing filler metal and powder metallurgy brazing filler metal are analyzed. The article highlights the problems encountered in the research and development of composite brazing materials and proposes future development directions, such as with low-silver and cadmium-free brazing filler metals, the creation of new powder brazing filler metal-forming technology and improvements to the quality of brazing filler metals by shape control and performance optimization, to accelerate the process of brazing automation.

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21

Dev, S. C., Inder Singh, D. K. Basu, A. K. Bhattamishra, and C. S. Sivaramakrishnan. "Corrosion behaviour of silver brazing alloys in different environments." Anti-Corrosion Methods and Materials 44, no. 4 (August 1997): 260–64. http://dx.doi.org/10.1108/00035599710183225.

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22

Wang, Xingxing, Shuai Li, and Jin Peng. "Corrosion behaviors of 316LN stainless steel joints brazed with Sn-plated silver filler metals." International Journal of Modern Physics B 32, no. 16 (June 28, 2018): 1850198. http://dx.doi.org/10.1142/s0217979218501989.

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AgCuZnSn filler metals were prepared from the BAg34CuZnSn filler metal by a combinative process of brush plating and thermal diffusion, and the prepared filler metals were applied to the induction brazing of the 316LN stainless steel. The corrosion behaviors of the brazed joints was evaluated based on local corrosion analyses, where the morphology of the joints was analyzed by scanning electron microscopy (SEM) after immersion in a 3.5 wt.% NaCl aqueous solution and electrolytic etching in a 10 vol.% oxalic acid solution. The microstructure of the brazed joints with the Sn-plated filler mainly consisted of the Ag phase, Cu phase, CuZn phase, Cu5Zn8 phase, Cu[Formula: see text]Sn[Formula: see text] phase and Ag3Sn phase. The local corrosion analysis results indicated that galvanic corrosion occurred near the interface between the stainless steel base metal and the brazing seam. With increasing local corrosion time, the corrosion rates of both the brazing seam and the base metal first exhibited an increasing trend, followed by a decreasing trend, and the corrosion rate of the brazing seam was slightly greater than that of the base metal. The corrosion behaviors analysis indicated that the corrosion resistance of the brazing seam was reduced, and concave defects emerged after electrolytic etching for 90 s.

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23

Winiowski, A., and D. Majewski. "Brazing of Titanium with Aluminium Alloys." Archives of Metallurgy and Materials 62, no. 2 (June 1, 2017): 763–70. http://dx.doi.org/10.1515/amm-2017-0114.

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Abstract This study presents results of vacuum diffusion brazing of Grade 2 titanium with 6082 (AlMg1Si0.6Cu0.3) aluminium alloy using B-Ag72Cu-780 (Ag72Cu28) grade silver brazing metal as an interlayer. Brazed joints underwent shear tests, light-microscopy-based metallographic examinations and structural examinations using scanning electron microscopy (SEM) and X-ray energy dispersive spectrometry (EDS). The highest quality and shear strength of 20 MPa was characteristic of joints brazed at 530°C with a 30-minute hold. The structural examinations revealed that in diffusion zone near the boundary with titanium the braze contained solid solutions based on hard and brittle Ti-Al type intermetallic phases determining the strength of the joints.

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24

Yuan, Lin Lin, Jing Tao Han, and Jing Liu. "Microstructure and Mechanical Property Analyses of Brazing Titanium and Low Carbon Steel Using Silver-Based Brazing Alloy." Advanced Materials Research 941-944 (June 2014): 169–77. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.169.

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Brazing of commercially pure titanium to low carbon steel by using the Ag72Cu28 interlayer at different conditions was carried out in the present work in order to investigate the tensile-shear strength, microstructure and the fracture morphology of brazed joint. The results show that different intermetallic compounds such as CuTi,CuTi2,Cu4Ti3 and FeTi were formed at the bonding area. It was observed that the microstructure of joint has a considerable effect on tensile-shear strength of the brazed samples and the maximum tensile-shear strength was achieved at “750°C-10min→850°C-5min”.All the fracture paths after tensile-shear tests occurred in the interface between titanium and silver-based interlayer in spite of the different fracture morphology.

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25

Akbari Mousavi, Seyed Ali Asghar, P. Sherafati, and M. M. Hoseinion. "Investigation on Wettability and Metallurgical and Mechanical Properties of Cemented Carbide and Steel Brazed Joint." Advanced Materials Research 445 (January 2012): 759–64. http://dx.doi.org/10.4028/www.scientific.net/amr.445.759.

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In this study the wettability, microstructure and mechanical properties of joining between cemented carbide and CK35 steel which brazed with two filler metals, L-Ag40Cd and L-Ag34Cd, were investigated. Wettability test shows that with increase of brazing time, the contact angle decreases and the best situation was resulted in the 20 minute brazing. Microscopic investigation of the brazed area with both filler metal shows that there is a copper enriched primary phase and eutectic microstructure in the silver enriched matrix which composed of copper enriched particles. The amount and the dispersion of precipitates are depended upon type of filler metal and brazing temperature. The results show that brazing with L-Ag34Cd filler metal at 800 °C exhibit superior shear strength in the level of 108 MPa.

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26

Simões, Sónia, Ana Soares, Carlos José Tavares, and Aníbal Guedes. "Joining of TiAl Alloy Using Novel Ag–Cu Sputtered Coated Ti Brazing Filler." Microscopy and Microanalysis 25, no. 1 (November 6, 2018): 192–95. http://dx.doi.org/10.1017/s1431927618015295.

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AbstractThe aim of this study is to evaluate the potential use of titanium foil coated with sputtered silver and copper films as a novel brazing filler for joining TiAl alloys. For this purpose, a detailed microstructural characterization of the resulting brazing interfaces was carried out. The development of brazing fillers that allow the joining of TiAl alloys without compromising the service temperature is a fruitful prospect. Brazing experiments were performed in a vacuum at 900, 950, and 980°C, with a dwell time of 30 min. Microstructural characterization reveals that brazing joints can be obtained successfully at 950 and 980°C. The interface consists of a large central region of α-Ti with an amount of Al and Ti–Ag compound and thin layers, mainly composed of intermetallic compounds, formed close to the base material. A novel brazing filler consisting of Ti foil coated with sputtered Ag and Cu films inhibits the extensive formation of soft (Ag) zones or coarse brittle Ti–Al–(Cu,Ni) particles. Hence, the need for post-brazing heat treatments for the joining of TiAl alloys was avoided.

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Bae, Sung Hwa, Joon Young Choi, and Injoon Son. "Effect of Electroless Ni-P Plating on the Bonding Strength of PbTe Thermoelectric Module Using Silver Alloy-Based Brazing." Materials Science Forum 985 (April 2020): 16–22. http://dx.doi.org/10.4028/www.scientific.net/msf.985.16.

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This study investigates a brazing method for manufacturing PbTe thermoelectric modules using a Ag-based filler metal with a melting point of about 650 °C. To improve the bonding strength between the Ag-based brazing layer and the PbTe thermoelectric module, an electroless Ni-P plating layer is formed on the surface of the thermoelectric module as a diffusion barrier layer. The bonding strength of the PbTe thermoelectric module manufactured by the electroless Ni-P plating and Ag-based brazing has a high value of approximately 8.3 MPa. No defects such as pores or cracks were observed at the bonding interface between the thermoelectric element and the brazing layer. Furthermore, because of the high bonding strength of the manufactured thermoelectric module, fractures occur inside the thermoelectric element rather than at the bonding interface. Accordingly, the electroless Ni-P plating and Ag-based brazing method proposed in this study is found to be effective in manufacturing PbTe-based thermoelectric modules with high bonding strength.

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Kapoor, Rakesh R., Edward S. Podszus, and Thomas W. Eagar. "Wettability of silver based reactive metal brazing alloys on alumina." Scripta Metallurgica 22, no. 8 (January 1988): 1277–79. http://dx.doi.org/10.1016/s0036-9748(88)80146-7.

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29

Kozlova, O., R. Voytovych, M. F. Devismes, and N. Eustathopoulos. "Wetting and brazing of stainless steels by copper–silver eutectic." Materials Science and Engineering: A 495, no. 1-2 (November 2008): 96–101. http://dx.doi.org/10.1016/j.msea.2007.10.101.

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30

Wang, Xingxing, Jin Peng, and Datian Cui. "Study on a novel Sn-electroplated silver brazing filler metal." Materials Research Express 4, no. 8 (August 16, 2017): 086509. http://dx.doi.org/10.1088/2053-1591/aa81e0.

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31

López-Cuevas, Jorge, Howard Jones, and Helen V. Atkinson. "Wettability of Silica Substrates by Silver-Copper Based Brazing AlloysinVacuo." Journal of the American Ceramic Society 83, no. 12 (December 2000): 2913–18. http://dx.doi.org/10.1111/j.1151-2916.2000.tb01660.x.

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32

Kusrijadi, Ali, Budi Triyono, and Ms Riswanda. "PROSES BRAZING Cu-Ag BERBAHAN BAKAR BIOGAS TERMURNIKAN." Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam 14, no. 2 (January 13, 2015): 105. http://dx.doi.org/10.18269/jpmipa.v14i2.365.

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Pemanfaatan biogas sebagai salah satu alternatif bahan bakar pada proses brazing merupakan langkah diversifikasi biogas, yang diharapkan dapat meningkatkan tingkat efisiensi dan keramahan teknologi. Permasalahan yang bersifat teknis dan menjadi kendala dalam pemanfaatan biogas ini adalah rendahnya konsentrasi CH4 dikarenakan adanya pengotor utama berupa air, karbondioksida dan asam disulfida. Penelitian dilakukan melalui dua tahap yaitu tahap pressureized storage process meliputi pemisahan komponen pengotor yang terdapat dalam biogas melalui teknik absorbsi sehingga dihasilkan biogas yang berkualitas gas alam terbarukan dan proses injeksi ke dalam suatu tangki penyimpanan, dan tahap selanjutnya adalah menggunakan biogas tersebut pada proses brazing logam Cu (tembaga) dengan bahan tambah Ag (silver). Analisis hasil brazing dilakukan melalui analisis struktur mikro (metalografi) untuk melihat kualitas tampak dari hasil brazing, serta analisis kekerasan mikro dan analisis parameter fisik standar terhadap hasil proses brazing. Penelitian ini telah menghasilkan perangkat alat pemurnian biogas yang dapat memurnikan biogas menjadi metana mendekati 100% dan sistem pengemasan (storage system) biogas bertekanan hingga 2 bar. Dari hasil analisis struktur mikro dan uji kekerasan mikro diketahui bahwa hasil proses brazing dengan biogas menghasilkan kualitas yang sama dengan hasil proses brazing dengan gas acetylene sehingga disimpulkan bahwa biogas dapat menjadi bahan bakar alternatif untuk proses brazing, khususnya untuk logam Cu dengan bahan tambah Ag. Kata kunci : Biogas, Pressureized Storage, Brazing

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33

Brockhurst, P. J., and C. K. Feltoe. "Corrosion and fracture of a silver tracheostomy tube." Journal of Laryngology & Otology 105, no. 1 (January 1991): 48–49. http://dx.doi.org/10.1017/s0022215100114811.

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AbstractA sterling silver tracheostomy tube broke in use resulting in the death of a child. The nature of the fracture in the brazed joint is described, and corrosion identified as the mechanism of degradation of the joint. The corrosion is due either to exposure to body fluids over a long period, or to the use of hypochlorite solutions for cleaning and disinfection. The silver braze used had inferior corrosion resistance. It is recommended that appropriate grades of silver brazing alloy be used in the future, and that the mechanical integrity of medical devices joined with silver braze be regularly checked to anticipate failure in use.

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34

Gąsior, W., and A. Winiowski. "Properties of Silver Brazing Alloys Containing Lithium / Właściwości Spoiw Srebrnych Do Lutowania Twardego Z Dodatkiem Litu." Archives of Metallurgy and Materials 57, no. 4 (December 1, 2012): 1087–93. http://dx.doi.org/10.2478/v10172-012-0121-5.

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The analysis of the influence of lithium on wetting properties of Ag-Cu brazing alloys and the shear strength of stainless steel/braze/stainless steel joint was conducted. The brazing alloys of designations and composition according to ANSI/AWS A5.8: BAg-8a (71÷3 wt.% Ag, 0.25÷0.50 wt.% Li, Cu) and BAg-19 (92÷93 wt.% Ag, 0.15÷0.30 wt.% Li, Cu) and a braze alloy containing 70÷72 wt.% Ag, 0.6÷0.7 wt.% Li and Cu were subjected to the investigations. The wettability properties of the brazing silver alloys were examined in a spread test. The shear strength of joints were measured on the joints of stainless steel in the tensile test. The comparison of results showed a beneficial effect of lithium on the spreading properties and the wettability of braze alloys as well as the quality and shear strength of the brazed joints. The observed slag inclusions in the solid braze did not affect considerably the mechanical properties of the prepared joints because of the intensive deoxidation of the brazing surfaces of stainless steel elements.

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Yu, Hua, Liangliang Zhang, Fangfang Cai, Sujuan Zhong, Jia Ma, Li Bao, Yongtao Jiu, Bingli Hu, Shizhong Wei, and Weimin Long. "Microstructure and mechanical properties of brazing joint of silver-based composite filler metal." Nanotechnology Reviews 9, no. 1 (October 24, 2020): 1034–43. http://dx.doi.org/10.1515/ntrev-2020-0083.

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AbstractIn this article, environmental friendly BAg25Cu40Zn34Sn (BAg-25) and BAg30Cu37Zn32Sn (BAg-30) flux-core solder metal capable of facilitating automatic production of brazing manufacturing processes were prepared. The butt and lap induction brazing tests were carried out on the substrate with BAg-25 and BAg-30. Wettability, microstructure and mechanical properties of the solders on the base metal were studied by field emission scanning electron microscope (SEM-EDS), electron backscattering diffraction (EBSD), tensile testing machine and microhardness tester. Results indicated that the wetting property of BAg-30 with 30% silver content was better than that of BAg-25 with 25% silver content. At the same time, besides copper and silver-based solid solutions, the brazed joint of BAg-30 solder also contain Cu + Ag eutectic phase. In the brazed joint of BAg-25 solder, the grain size is smaller, which makes the tensile strength and the shear strength of the joints better. Therefore, the BAg-25 flux-core solder metal will further reduce the industrial cost and meet the requirements of mechanical properties.

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Khorram, A., and M. Ghoreishi. "Comparative study on laser brazing and furnace brazing of Inconel 718 alloys with silver based filler metal." Optics & Laser Technology 68 (May 2015): 165–74. http://dx.doi.org/10.1016/j.optlastec.2014.11.026.

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Sharma, Chaman Lal. "Optimization for Reduction in Defects of Brazing of Shock Loop Tube to Resonator." International Journal for Research in Applied Science and Engineering Technology 9, no. 9 (September 30, 2021): 93–101. http://dx.doi.org/10.22214/ijraset.2021.37950.

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Abstract: Rejection Y variable shows the rejection percentage and optimization phase done with the help of Minitab software. Various design parameters have been selected to identify for the optimization like heating time, the weight of silver brazing wire, and power rating of the equipment extra. Improve phase revealed that the Weight 0.311 Gms, Heating time 11 Sec, Power rating 5 KW is good in the better condition as compared with the current condition. In the end, the conclusion shows that the bulk supplies of 0.3mm silver ring received and started in the production line and the work standard has been established. By doing daily routine activity checks, after one month there is a drop in the rejection and the cost regarding this has also been achieved. Keywords: Reduction in Defects of Brazing, Shock Loop Tube, Resonator, DMAIC approach, Resonator Optimization

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Takeshita, Kunimasa, and Hisashi Takada. "Low Temperature Brazing of Titanium with Silver-Aluminum-Tin Filler Alloys." Journal of the Japan Institute of Metals 55, no. 3 (1991): 330–36. http://dx.doi.org/10.2320/jinstmet1952.55.3_330.

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Wang, Xingxing, Jin Peng, and Datian Cui. "Quantitative characterization of brazing performance for Sn-plated silver alloy fillers." Materials Research Express 4, no. 12 (December 7, 2017): 126509. http://dx.doi.org/10.1088/2053-1591/aa9c2b.

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KAWANO, Tomoro, Kazuya MORI, Saeko TOKUOMI, Yuki FUJISHITA, and Kazufumi SAKATA. "Increasing Brazing Joint Strength between Cemented Carbide with Silver Filler Metal." Proceedings of the Materials and Mechanics Conference 2018 (2018): OS1303. http://dx.doi.org/10.1299/jsmemm.2018.os1303.

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Suganuma, K., S. Sugihara, and K. Okazaki. "Interface microstructure between silicon and silver formed after eutectic brazing reaction." Journal of Materials Science 29, no. 16 (August 1994): 4371–78. http://dx.doi.org/10.1007/bf00414224.

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42

Rabinkin, A., F. Reidinger, J. Marti, and L. Bendersky. "Processing, structure and performance of RS “classical” silver-base brazing alloys." Materials Science and Engineering: A 133 (March 1991): 256–60. http://dx.doi.org/10.1016/0921-5093(91)90064-t.

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Wu, Jie, Songbai Xue, and Peng Zhang. "Effect of In and Pr on the Microstructure and Properties of Low-Silver Filler Metal." Crystals 11, no. 8 (August 11, 2021): 929. http://dx.doi.org/10.3390/cryst11080929.

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The novel low-silver 12AgCuZnSn filler metals containing In and Pr were used for flame brazing of copper and 304 stainless steel in this study. The effects of In and Pr content on the melting temperature, wettability, mechanical properties and microstructure of 12AgCuZnSn filler metal were analyzed. The results indicate that the solidus and liquidus temperatures of filler metals decrease with the addition of In. Trace amounts of Pr have little impact on the melting temperature of the low-silver filler metals. In addition, the spreading area of filler metals on copper and 304 stainless steel is improved. The highest shear strength of brazed joint is 427 MPa when the content of In and Pr are 2 wt.% and 0.15 wt.%, respectively. Moreover, it is observed that the trace amount of Pr significantly refines the microstructure of brazed joint matrix. A bright Pr3Cu4Sn4 phase is found in filler metal and brazing seam when the contents of In and Pr are 5 wt.% and 0.5 wt.%, respectively.

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Wiewiórowska, Sylwia, Zbigniew Muskalski, and Maciej Suliga. "Determination of Temperature Range Enabling the Plastic Deformation Process of CP302 Solder." Solid State Phenomena 165 (June 2010): 226–30. http://dx.doi.org/10.4028/www.scientific.net/ssp.165.226.

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The development of new technologies of metal joining processes including brazing methods requires improvement of solder properties. Copper-based brazing solders with phosphorus and tin additions belong to the group of silver-free brazing alloys with low ductility. The most common form of these solders are bars and wires so there is a need to determine the causes of technological problems concerned with plastic deformation of the solders. In the literature, except for the chemical composition and temperature of brazing, we can not find the details regarding the change of solder structure during heating processes. The preliminary tests carried out in the industry indicate high plasticity of solder in the narrow range of temperature. This encouraged the authors of the paper to perform dilatometric testing with the aim of establishing the precise temperatures of solder phase changes. The metallographic research with the use of scanning electron microscopy enabled the determination of phase composition of “freezing” structures and the evaluation of their flexibility to the plastic deformation.

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Wu, Jie, Songbai Xue, Zhen Yao, and Weimin Long. "Study on Microstructure and Properties of 12Ag–Cu–Zn–Sn Cadmium-Free Filler Metals with Trace In Addition." Crystals 11, no. 5 (May 16, 2021): 557. http://dx.doi.org/10.3390/cryst11050557.

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The effect of different In contents on the melting characteristics, mechanical properties, and microstructure of 12Ag–Cu–Zn–Sn filler metal was investigated in this paper, and flame brazing of 304 stainless steel and copper plates was done using the 12Ag–Cu–Zn–Sn–xIn filler metal. The results indicate that adding appropriate amount of In can evidently decrease the solidus and liquidus temperatures and improve the wettability of the low silver based filler metals. In addition, the shear strength of 304 stainless steel and copper plates joint brazed by 12Ag–Cu–Zn–Sn–1In are satisfactory due to the solution strength effect, and scanning electron microscopy examination of the braze-zone revealed that more relatively sound joints were obtained when brazing was done with 12Ag–Cu–Zn–Sn–xIn filler metal than with Indium free one; its performance is comparable to that of the joint brazed with the 20Ag–Cu–Zn–Sn filler metal, having a remarkable silver-saving effect.

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Jacq, Caroline, Thomas Maeder, Lucas Güniat, Adrien Corne, Duccio Testa, and Peter Ryser. "Porous thick-film silver metallisation for thermally mismatched brazing operations in tokamak magnetic sensor." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2015, CICMT (September 1, 2015): 000234–38. http://dx.doi.org/10.4071/cicmt-wp15.

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A novel sensor based on thick-film + LTCC (low-temperature cofired ceramic) technology has been recently developed for sensing high-frequency 3D magnetic fields in tokamak fusion devices. For integration within the walls of the tokamak, the sensor has to be connected to the mineral-insulated cabling, which is carried out by brazing to ensure sufficient thermal stability. However, thermal mismatch stresses between the braze and the cable vs. the alumina substrate may cause local cracking of the latter during cooling, as the basic dense silver metallisation of the alumina does not provide a sufficient degree of stress decoupling. To address this issue, a series of porous metallisations have been formulated by incorporation of a mix of silver and fugitive graphite powder into a thick-film paste. To allow co-firing of thick, multi-layered prints. Such porous metallisations have allowed successful brazing operations, without cracking of the alumina substrate. Metallisations were assessed by measuring their electrical resistivity and shear stress have been realised as preliminary results to measure the influence of the porosity on the maximal stress before cracking.

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Sarhan, Ahmed AD. "Dissimilar vacuum brazing of WC-Co and cold work steel utilizing a new near-eutectic silver-copper filler alloy." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 234, no. 6-7 (December 24, 2019): 1019–31. http://dx.doi.org/10.1177/0954405419893854.

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Tungsten carbides are extremely high in hardness and they are wear-resistant materials. However, they are extremely brittle materials that render them ideal for many applications. Brazing technology has been proved to be a promising approach for joining tungsten carbide to tough metals to create high strength, tough and impact-resistant joint in the final assembly. In this research work, a dissimilar brazing of tungsten carbide (WC-Co) and cold work steel will be achieved using a new type of filler, a silver-copper near-eutectic alloy (BAg-8T) (Ag70Cu28Ti2). (BAg-8T) as a mixed alloy (eutectic and titanium) can melt/solidify completely in a very narrow temperature range (778 °C/800 °C), lower than any other existing brazing filler alloy; this will reduce the possibility of partial fastening while solidification. In addition, (BAg-8T) filler will act as the soft-iron gauze. Being soft and ductile metals, they will creep and absorb the movement due to differential contraction of the carbide and tool shank. Besides, they will improve the wetting on the carbide. In this research work, the effect of the joining parameters (brazing temperature and cobalt percentage in the tungsten carbide) on the mechanical properties and microstructure of the brazed joint will be investigated to determine the best joint performance.

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Valero-Gómez, A., J. García-Antón, and A. Igual-Muñoz. "Corrosion Behavior of Copper-Phosphorus-Silver Brazing Alloys in Lithium Bromide Solutions." CORROSION 62, no. 9 (September 2006): 751–64. http://dx.doi.org/10.5006/1.3278300.

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WATANABE, Takehiko, and Norihiko TAMAKI. "Brazing of commercially pure titanium using silver-based filler metal containing nickel." Journal of Japan Institute of Light Metals 55, no. 1 (2005): 20–26. http://dx.doi.org/10.2464/jilm.55.20.

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Khorram, A., M. Ghoreishi, M. J. Torkamany, and M. M. Bali. "Laser brazing of inconel 718 alloy with a silver based filler metal." Optics & Laser Technology 56 (March 2014): 443–50. http://dx.doi.org/10.1016/j.optlastec.2013.08.022.

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Journal articles on the topic 'Silver brazing'

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