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Scolaro, Juliano Milczewsky, Jefferson Ricardo Pereira, Accácio Lins do Valle, Gerson Bonfante, and Luiz Fernando Pegoraro. "Comparative study of ceramic-to-metal bonding." Brazilian Dental Journal 18, no. 3 (2007): 240–43. http://dx.doi.org/10.1590/s0103-64402007000300012.
Dentists and technicians have used dental ceramics associated with different types of alloys without taking into account the characteristics of compatibility of these materials. Knowing the properties of the alloy and ceramic used in metal/ceramic restorations is a key factor for treatment success. The purpose of this study was to evaluate the bond strength of a palladium-silver alloy (Pors-on 4) to 3 ceramics (Ceramco, Noritake and Vita VMK-68) using shear forces at the metal-ceramic interface. A stainless steel cylindrical matrix was used for preparation of the metal dies, application of ceramic and shear strength testing. Thirty palladium-silver alloy cylinders received two layers of opaque and two layers of body porcelain, and shear tests were performed in a universal testing machine at a cross-head speed of 0.5 mm/min. Shear bond strength means (in MPa) were: 28.21(Ceramco), 28.96 (Noritake) and 24.11 (Vita VMK-68). One-way ANOVA did not show statistically significant differences (p>0.05) among the materials. The results of this study indicate that the three evaluated ceramic systems are suitable to be used in combination with the tested palladium-silver alloy.
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Sreeja, R., P. V. Prabhakaran, Sushant K. Manwatkar, and S. Packirisamy. "Adhesive Joining of Metal to Metal and Metal to Ceramic by Ceramic Precursor Route." Materials Science Forum 710 (January 2012): 656–61. http://dx.doi.org/10.4028/www.scientific.net/msf.710.656.
Inorganic ceramic adhesives (geopolymers) based on aluminosilicate matrix are versatile candidates for bonding metals to metals or metals to ceramics. On curing, they result in an amorphous, crosslinked, impervious, acid resistant 3D-structures. Alkali activated aluminosilicate based ceramic adhesive was developed for bonding metals to ceramics and metal to metal, for high temperature applications. The bonding is achieved at 175°C for 3 hrs, by solid state reaction of alkaline solution of allkalisilicate precursor with the refractory filler, contributing to the bulk aluminosilicate matrix. Lap shear strength of 2-4 MPa was obtained for bonding stainless steel. The XRD patterns show the amorphous nature of the aluminosilicate matrix, with mullite formation at higher temperatures. Thermogravimetric analysis shows that the weight loss is only due to the removal of water from the system by means of evaporation and polycondensation of Si-OH groups and Al-OH groups. This is followed by structural reorganisation in which aluminium ions are incorporated into the silicate chains forming the Si-O-Al network resulting in the bonding with the metallic surface. The system can withstand the maximum operational temperatures of the substrates and can be used for bonding different metallic or ceramic, joints/interfaces for RLV-TD/TSTO.
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Gopinath, S., R. Sabarish, and R. Sasidharan. "Thermal analysis of metal-ceramic bonding using finite element method." International Journal of Engineering & Technology 3, no. 2 (April 26, 2014): 216. http://dx.doi.org/10.14419/ijet.v3i2.1830.
This paper reports a finite element study of effect of bonding strength between metal and ceramic. The bonding strength is evaluated with different processing temperature and holding time. The difference between the coefficients of linear thermal expansion (CTEs) of the metal and ceramic induces thermal stress at the interface. The mismatch thermal stress at the interface region plays an important role in improving bonding strength. Hence, it is essential to evaluate the interface bonding in metal-ceramics joints. The Al/SiC bonding was modeled and analyzed using finite element analysis in ANSYS (v.10). Keywords: Bonding Strength, Coefficient of Thermal Expansion, Thermal Stress, Interface, Al/Sic, FEA.
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Takashio, Haruo. "Ceramic-metal bonding mechanism." Bulletin of the Japan Institute of Metals 24, no. 2 (1985): 113–20. http://dx.doi.org/10.2320/materia1962.24.113.
Chmielewski, M., D. Kalinski, and K. Pietrzak. "Properties Dependency of Alumina - Steel Joints on Bonding Technique." Advances in Science and Technology 45 (October 2006): 1614–19. http://dx.doi.org/10.4028/www.scientific.net/ast.45.1614.
The development of technologies for joining ceramics and metals is connected with an introduction of new ceramic materials and new applications of ceramic-metal joints, to work in ever more difficult conditions. It concerns mainly ceramic-metal joints working at high and variable temperatures (a facing layer of burners, turbine vanes, etc.) or in a chemically aggressive environment (chemical apparatuses, purification plants). This paper presents the analysis of the influence of the bonding technique on thermal residual stresses generated in ceramic-metal joints and their properties. Technological bonding tests were made using well-known diffusion bonding and powder metallization techniques, and with elaborated sintered Al2O3-Cr gradient interlayer. Numerical calculations (the finite elements method) of the state of thermal residual stresses, as well as the verifying technological tests, were made for the following pair of materials: Al2O3 ceramics - heat resisting steel. There were also made tests of resistance for sudden temperature changes and for oxidation at high temperature. There was found a significant effect of the bonding techniques on the thermal residual stresses and properties of obtained alumina-steel joints.
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Yoo, Soo-Yoen, Seong-Kyun Kim, Seong-Joo Heo, Jai-Young Koak, and Joung-Gyu Kim. "Effects of Bonding Agents on Metal-Ceramic Bond Strength of Co-Cr Alloys Fabricated by Selective Laser Melting." Materials 13, no. 19 (September 28, 2020): 4322. http://dx.doi.org/10.3390/ma13194322.
Bonding agents have been developed to improve bond strength between ceramic and Co-Cr metal. The aim of this study was to investigate the influence of two bonding agents on bond strength of Co-Cr metal fabricated by selective laser melting (SLM). Bond strength was determined by a three-point bending test, and the interfaces of the metal and ceramic, before and after the bending test, were observed by optical microscopy and scanning electron microscopy (SEM) to determine the thickness of the oxide layer and amount of ceramic remaining. To analyze the elemental composition of the bonding agents and fractured surfaces, energy dispersive X-ray spectroscopy (EDS) was used. Co-Cr specimens with bonding agent showed significantly higher bond strength than Co-Cr specimens without bonding agents. The fractured surfaces of most specimens showed mixed failure, but failure mode varied according to bonding agent and fabrication type. Specimens from groups treated with bonding agents had significantly higher remaining ceramic fractions on fractured Co-Cr alloys than specimens from groups that did not receive bonding agent. Mass amounts of silicone (Si) and titanium (Ti) on the fractured alloy surfaces were also different among specimens according to method of fabrication and presence of bonding agent. Together, the results suggest that application of bonding agent to 3D printed Co-Cr metal increases bond strength with ceramics.
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Miculescu, Marian, Mihai Branzei, Florin Miculescu, Daniela Meghea, and Marin Bane. "A Study on Metal-Ceramic Thermal Expansion Compatibility." Solid State Phenomena 216 (August 2014): 85–90. http://dx.doi.org/10.4028/www.scientific.net/ssp.216.85.
Push rod method for determining linear thermal expansion using vertical differential dilatometer was used in the study of the thermal compatibility of metal-ceramic systems for dental applications. The purpose of this study consisted in evaluating the effectiveness of dental coating by determining the ceramic metal bonding strength of metal-ceramic couples (Ni-Cr and Co-Cr alloy coated with dental ceramic) and correlation with the difference of linear thermal expansion coefficients of metals and ceramics.
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Murakami, Itsuki, and Allan Schulman. "Aspects of Metal–Ceramic Bonding." Dental Clinics of North America 31, no. 3 (July 1987): 333–46. http://dx.doi.org/10.1016/s0011-8532(22)02075-4.
Morozumi, Shotaro. "Preface in metal-ceramic bonding." Bulletin of the Japan Institute of Metals 25, no. 5 (1986): 411–12. http://dx.doi.org/10.2320/materia1962.25.411.
Evans, A. G., and M. Rühle. "Microstructure and Fracture Resistance of Metal/Ceramic Interfaces." MRS Bulletin 15, no. 10 (October 1990): 46–50. http://dx.doi.org/10.1557/s0883769400058668.
Metal-ceramic interfaces play an important, sometimes controlling, role in composites, multilayer substrates, capacitors, electron tubes, and automotive power sources. Often bonding and adhesion between the ceramic and metal are critical to the components' performance. Interface geometry and chemistry play a dominant role in determining the mechanical and electrical integrity of composites. Furthermore, unique properties may be developed from multilayer ceramic-metal structures.Systematic studies of metal-ceramic interfaces started in the early 1960s. Such studies were directed toward identifying general rules that govern bonding and interface behavior both theoretically and experimentally, including the thermodynamics of interfacial reactions and crys-tallographic relationships, and toward evaluating atomistic structure at the interface. This article summarizes results concerning the interrelation between atomistic structure and the macroscopic fracture resistance of metal-ceramic interfaces. More details are published in a recent conference proceedings.Determining atomistic structures of metal-ceramics interfaces is, in general, complicated since the two materials that have to be matched exhibit different atoms (ions) and possess different crystal symmetries, crystal structures, and lattice parameters. The adjacent lattices are not commensurate, the two different structures can be described as being just quasiperiodic. However, examples exist where the lattice mismatch is small, and both components possess the same lattice symmetry. Ag/MgO and Nb/Al2O3 interfaces are examples that serve as model systems for experimental studies as well as theoretical calculations. The interfaces can be formed either by diffusion-bonding, internal oxidation, or epitaxial film growth.
Mun, Je Do. "Metal/ceramic interface properties in diffusion bonding." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240511.
Zbären, Christoph Oliver. "The effect of thermal cycling on metal-ceramic bond strength /." [S.l.] : [s.n.], 2009. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000288150.
Pilz, Adrian Take. "Transient liquid phase diffusion bonding of reaction bonded silicon carbide." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241960.
Suansuwan, Napa. "Application Of Strain Energy Release Rate To Characterise The Adhesion At Ceramic-Metal Interfaces." Thesis, The University of Sydney, 2001. http://hdl.handle.net/2123/4865.
McDermid, Joseph Robert. "The joining of reaction bonded silicon carbide to inconel 600 /." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63772.
Khmaj, Mofida R. ajaili. "Comparison of Metal-Ceramic Bond Strengths of Four Noble Alloys using Press-on-Metal (PoM) and Conventional Layering Techniques." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1338398303.
Monehi, Serufe Emily. "Comparing two orthodontic brackets’ bond to fluorosed and non-fluorosed enamel - an in vitro study." Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/46032.
Orthodontic attachments must be able to bond to a wide range of tooth and prosthetic surfaces. Despite the high prevalence of fluorosis in many parts of South Africa (Louw A, Chikte U 1997), only limited information is available on the integrity of the bond between orthodontic brackets and fluorosed teeth.
The objective of this study was to measure and compare Shear Bond Strengths (SBSs) of metal and ceramic orthodontic brackets on fluorosed and non-fluorosed teeth.
One hundred and twenty (60 fluorosed and 60 non-fluorosed) extracted premolar teeth were divided into four groups A to D, consisting of 30 teeth in each group. BluGloo® was used as an orthodontic adhesive to bond brackets on the buccal surface of each tooth. The experimental groups consisted of Group A, in which Nu-Edge® metal brackets were used and Group B, in which InspireIce® ceramic brackets were bonded to fluorosed teeth. Group C and D consisted of Nu-Edge® metal brackets and InspireIce® ceramic respectively, bonded to non-fluorosed teeth. Bonding techniques were kept the same and standardised for all four groups. An Instron testing device was used to debond and measure the SBSs. SBSs were compared using ANOVA with posthoc analysis done using Dunnett’s C test for pairwise comparisons. Significance was set at P<0.05.
The results showed that SBS of Group B>Group C>Group D>Group A. Ceramic brackets bonded to fluorosed teeth had the highest SBS with a mean of 15.78 (SD=9.07) Megapascals (MPa), while metal brackets bonded to fluorosed teeth produced the lowest SBS of 8.41 (SD=4.68) MPa. The SBSs of ceramic brackets bonded to fluorosed teeth was significantly higher than that of SBS of metal brackets bonded to fluorosed teeth, but not significantly different from SBSs obtained from either brackets bonded to non-flurosed teeth.
The BluGloo adhesive if used to bond ceramic brackets to fluorosed teeth can produce adequate SBS for clinical use. The recommendation from this study is that ceramic brackets can be used efficiently to bond to fluorosed teeth. A follow up study should be carried out to assess the nature of enamel damage caused during debonding of flourosed teeth. This is a laboratory study and thus the clinical application should be interpreted with caution. Dissertation (MChD)--University of Pretoria, 2014. tm2015 Orthodontics MChD Unrestricted
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Spirig, John Vincent. "A new generation of high temperature oxygen sensors." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1188570727.
Bond, Philip Harvey. "Analysis of flexible interlayers between metals and ceramics." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282713.
D, Peteves S., Commission of the European Communities., and European Colloquium on "Designing Interfaces for Technological Applications: Ceramic-Ceramic, Ceramic-Metal Joining (1988 : Petten, Netherlands), eds. Designing interfaces for technological applications: Ceramic-ceramic ceramic-metal joining. London: Elsevier Applied Science, 1989.
W, Kraft, Deutsche Gesellschaft für Metallkunde, and International Conference on Joining Ceramics, Glass and Metal (3rd : 1989 : Bad Nauheim, Germany), eds. Joining ceramics, glass, and metal. Oberursel: DGM Informationsgesellschaft, 1989.
Miyoshi, Kazuhisa. Adhesion, friction, and wear behavior of clean metal-ceramic couples. [Washington, DC]: National Aeronautics and Space Administration, 1995.
Y, Lin R., TMS Process Fundamentals Committee., Minerals, Metals and Materials Society. Composite Committee., Minerals, Metals and Materials Society. Meeting, and Symposium on Interfaces in Metal-Ceramics Composites (1990 : Anaheim, Calif.), eds. Interfaces in metal-ceramics composites: Proceedings of the international conference on interfaces in metal-ceramics composites. Warrendale, Pa: Minerals, Metals & Materials Society, 1990.
H, Krappitz, Schaeffer Helmut A, Deutsche Glastechnische Gesellschaft, and International Conference on Joining Ceramics, Glass and Metal (4th : 1993 : Königswinter, Germany), eds. Joining ceramics, glass, and metal: Proceedings of the 4th international conference : May 17-19, 1993, Königswinter (Germany). Frankfurt/M., Germany: Verlag der Deutschen Glastechnische Gesellschaft, 1993.
Manfred, Rühle, and Workshop on Bonding, Structure, and Mechanical Properties of Metal/Ceramic Interfaces (1989 : University of California, Santa Barbara, College of Engineering), eds. Metal-ceramic interfaces: Proceedings of an international workshop, Coronado, California, USA, 16-18 January 1989. Oxford: Pergamon, 1990.
E, Reimanis Ivar, Henager C. H, Tomsia Antoni P, and American Ceramic Society Meeting, eds. Ceramic joining. Westerville, Ohio: American Ceramic Society, 1997.
Qin, C. D., and B. Derby. "Interfaces in Metal/Ceramic Diffusion Bonds." In Diffusion Bonding 2, 224–31. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3674-7_18.
Nicholas, M. G. "Bonding Ceramic-Metal Interfaces and Joints." In Ceramic Microstructures ’86, 349–57. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1933-7_36.
Nicholas, M. G. "Material Aspects of Ceramic-Ceramic and Ceramic-Metal Bonding." In Advanced Joining Technologies, 160–71. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0433-0_13.
Jauch, U., and G. Ondracek. "Solid state investigation of ceramic-metal interface bonding." In Brittle Matrix Composites 2, 302–11. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2544-1_32.
Serkowski, Stanislaw. "Application of Ceramic-Metal Eutectics for Solid-State Bonding Between Ceramics." In 4th International Symposium on Ceramic Materials and Components for Engines, 348–55. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2882-7_34.
Charreyron, Pierre O., Noel J. Bylina, and James G. Hannoosh. "Ceramic-to-Metal Bonding from a Fracture Mechanics Perspective." In Fracture Mechanics of Ceramics, 225–38. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4615-7026-4_18.
Rühle, M., M. Backhaus-Ricoult, K. Burger, and W. Mader. "Diffusion Bonding of Metal/Ceramic Interfaces — A Model Study at The Nb/Al2O3 Interfaces." In Ceramic Microstructures ’86, 295–305. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1933-7_31.
De Hosson, J. Th M., H. B. Groen, B. J. Kooi, and H. Haarsma. "Bonding at Metal-Ceramic Interfaces Studied with High Resolution Transmission Electron Microscopy." In Interface Controlled Materials, 207–20. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/352760622x.ch35.
Frigge, Martina, and Günter Völksch. "Investigation of the Bonding Mechanism of Glass Ceramic Layers on Metal Alloys." In Microbeam and Nanobeam Analysis, 299–305. Vienna: Springer Vienna, 1996. http://dx.doi.org/10.1007/978-3-7091-6555-3_21.
Peng, Y. T., D. D. Hass, and Y. V. Murty. "Reactive Bonding of Sapphire Single Crystal to Tungsten-Copper Metal Composite Using Directed Vapor Deposition Process." In Advanced Ceramic Coatings and Interfaces II, 209–18. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2009. http://dx.doi.org/10.1002/9780470339510.ch21.
Тези доповідей конференцій з теми "Ceramic metal bonding":
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Tateno, Masayoshi, and Takahiro Miura. "Effects of Metal Thickness on Bonding Strength in Bonded Dissimilar Materials." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-29021.
This study provides effects of metal thickness on bonding tensile strength of ceramic to metal joint based on numerical and experimental analyses. Thermal elastoplastic FEA was carried out to clarify effects of the metal side thickness on the stress distribution near the edge of the interface on ceramic side by changing metal side thickness each bonded silicon nitride to nickel joint system. It was confirmed the stress distribution on the ceramic of the joint system depends on the metal side thickness based on the FEM results. Decreasing of metal thickness reduces the intensity of the stress near the edge of the interface on ceramics side. It can be effective for reduction of the residual stress near the edge of the interface to use thin metal layer in the ceramic to metal joint. Reduction effects on the residual stress were confirmed by using two stages of bonding processing. This process used in this experiment consists of two stages, first bonding process as the ceramic are bonded to thin layer metal at high temperature, and secondary process as thick metal are bonded to the thin metal layer of the joint specimen at lower temperature than first stage. The bonding tensile strength of the joint specimens manufactured from the two stages bonding processe was evaluated experimentally. It appears that setting a ratio of metal thickness to length of the interface to approximate tm/W=0.08 achieves maximum bonding tensile strength. Effects of metal thickness on bonding tensile strength of ceramic to metal joint are confirmed based on numerical and experimental results.
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Kara-Slimane, A., and D. Treheux. "Prebrazing of Ceramics by Plasma Spraying for Metal-Ceramic Joining." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p1513.
Abstract Traditionnal brazing ailoys does not wet ceramic and therefore are unusable for metal ceramic bonding. To overcome this problem, we have pre-metallized different ceramics (AI2O3, AIN, SiAION) by plasma spraying of copper on ceramics. The good wettability of AgCu or AgCuTi alloy on so-coated ceramics is explained by effect of residual oxygen at interface which favours the thermodynamic adhesion during brazing. The interface analysis showed that silver or titanium segregation occurs at ceramic surface and that, conversely, sprayed copper diffuses in the brazed joint
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Tateno, Masayoshi, Hiroki Morikawa, and Kunio Kokubo. "Effect of Interface Wedge Angle in Ceramic Side on Tensile Bonding Strength in Ceramic to Metal Joint." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77835.
This study was performed to clarify the dependence of ceramic-to-metal joint bonding strength on the interface wedge angle on the ceramic side. Plate Si3N4-to-Ni joints with a plane interface were produced by electric discharge machining. The geometric interface shape at the edge of the interface is characterized by wedge angle on both sides of the ceramic and metal defined as a configuration angle between the free surface of each material and the interface. As the wedge angle of Ni is a right angle, the wedge angle of Si3N4 is set from 30° to 180°. Joints were bonded at high temperature using thin braze metal under vacuum and cooled slowly. The tensile bonding strength of the ceramic-to-metal joint was evaluated to determine the optimum interface shape. The highest bonding strength appeared under identical interface conditions where the fracture pattern changed. The optimum wedge angle to obtain the greatest bonding strength appears to depend on bonding temperature. This study provided a useful geometric interface shape to improve the tensile bonding strength of ceramic-to-metal joints.
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Tateno, Masayoshi, and Takashi Tominaga. "Bonding Temperature Condition Dependence of Strength Improvement Effect by Decrease of Metal Thickness in Ceramic to Metal Joint System." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63914.
This study provides effects of bonding temperature conditions on practical strength in ceramic to metal joint system made by two stages bonding process. Ceramic to metal joint system is required to reduce the residual stress near the edge of the interface and to improve bonding strength. The two stages bonding process, which was proposed in PVP2015-45822, can be a useful method to prevent the residual stress from increasing. This process consists of two stages, the first bonding process defined as a ceramic is bonded to thin metal layer at high temperature and the secondary process defined as a thick metal is bonded to the thin metal layer of the joint at lower temperature. It is necessary to provide effects of thickness of thin metal layer on the practical bonding strength in various combinations of the first and the secondary bonding temperature conditions. Past experimental results showed the practical bonding strength would be dominated by the residual stress near the edge of the interface between the thin metal layer and the ceramic. The residual stress can be associated with the first and/or the secondary bonding temperature conditions. Setting the optimum metal thickness improves the bonding strength independent of the bonding temperature conditions in the limited conditions. This paper provided dependence of the optimum metal layer thickness on the first and the secondary bonding temperature conditions was clarified experimentally. It also found effective metal thickness, which is capable of strengthening the siliconnitride to nickel joint system, in the combination of the first bonding temperature ranged over from 880°C to 980°C and the secondary bonding temperature ranged over from 600°C to 700°C. It appeared the first bonding temperature and the secondary one are set at the higher, the optimum metal thickness becomes smaller. The result showed that decreasing metal thickness possesses similar effect to decreasing bonding temperature for reducing the thermal residual stress. Reducing the residual stress is capable of strengthening the part of the edge of the interface on the ceramic side. Setting the metal layer thinner should be applied for producing the high strength ceramic to metal joint system. The two stages bonding process can contribute to achieve the high strength bonded dissimilar materials by setting the optimum thin metal thickness.
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Tateno, Masayoshi, and Eiichiro Yokoi. "Dependence of Bonding Strength of Ceramic to Metal Joint on Interface Wedge Angle in Metal Side." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78682.
The focus of this study is to clarify a dependence of bonding strength of ceramic to metal joint on interface wedge angle in metal side. Each plate Si3N4-to-Cu or Ni joint with plane interface is produced by electric discharge machining. Geometrical shape at the edge of the interface is characterized by wedge angle defined as a configuration angle between free surface of each material and the interface. As the wedge angle of Si3N4 is right angle, the wedge angle of metal is set over from 30° to 180°. Each joint is bonded at high temperature by using thin braze metal under vacuum and slowly cooled. Tensile bonding strength of the joint is evaluated. Result shows that decrease of the wedge angle of metal side from right angle improves the bonding strength since it decreases the residual stress near edge of the interface on ceramic side. The highest bonding strength appears at the identical interface condition where fracture pattern changes. It appears that optimum edge angle for obtaining the highest bonding strength depends on bonding temperature and combination of bonded materials. This paper provides a useful geometrical interface shape to improve tensile bonding strength of ceramic to metal joint.
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Tateno, Masayoshi, and Eiichirou Yokoi. "Effects of Interface Wedge Angle in Metal Side on Bonding Strength in Ceramic to Metal Joint." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57238.
This study was performed to clarify dependences of bonding strength on the interface wedge angle in the metal side of ceramic-to-metal joint. Each plate Si3N4 and Ni used for this experiment is produced by wire electric discharge machining. The geometric interface shape at the edge of the interface is characterized by wedge angle on both side of the ceramic and metal defined as a configuration angle between the free surface of each material and the interface. As the wedge angle of Si3N4 is a right angle, the wedge angle of Ni is set from 30° to 180°. Joint specimens were bonded at high temperature using braze metal of 0.05mm thickness under vacuum and cooled slowly. The tensile bonding strength of the ceramic-to-metal joint was evaluated to determine the optimum interface shape. The highest bonding strength appeared under identical interface conditions where the fracture pattern changed. This study provided a useful geometric interface shape to improve the tensile bonding strength of ceramic-to-metal joint.
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Drehmann, R., T. Grund, T. Lampke, B. Wielage, C. Wüstefeld, M. Motylenko, and D. Rafaja. "Essential Factors Influencing the Bonding Strength of Cold Sprayed Aluminum Coatings on Ceramic Substrates." In ITSC2017, edited by A. Agarwal, G. Bolelli, A. Concustell, Y. C. Lau, A. McDonald, F. L. Toma, E. Turunen, and C. A. Widener. DVS Media GmbH, 2017. http://dx.doi.org/10.31399/asm.cp.itsc2017p0090.
Abstract The present work summarizes the most important results of a research project dealing with the comprehensive!! investigation of the bonding mechanisms between cold sprayed Al coatings and various poly- and monocrystalline ceramic substrates (Al2O3, AlN, Si3N4, SiC, MgF2). Due to their exceptional combination of properties, metallized ceramics are gaining more and more importance for a wide variety of applications, especially in electronic engineering. Cold spraying provides a quick, flexible and cost-effective one-step process to apply metallic coatings on ceramic surfaces. However, since most of the existing cold spray-related publications focus on metallic substrates, only very little is known about the bonding mechanisms acting between cold sprayed metals and ceramic substrates. In this paper, the essential factors influencing the bonding strength in such composites are identified. Besides mechanical tensile strength testing, a thorough analysis of the coatings and especially the metal/ceramic interfaces was conducted by means of HRTEM, FFT, STEM, EDX, EELS, XRD and EBSD. The influence of substrate material, substrate temperature and particle size is evaluated with regard to the observed bonding behavior. The results suggest that, apart from mechanical interlocking, the adhesion of cold sprayed metallic coatings on ceramics is based on a complex interplay of different mechanisms such as quasi-adiabatic shearing, static recrystallization as well as heteroepitaxial growth.
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Drozda, F. O., H. Takano, and A. Oliveira. "PTA Processing of Ceramic Coatings." In ITSC2008, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2008. http://dx.doi.org/10.31399/asm.cp.itsc2008p0757.
Abstract Welding of dissimilar materials in particular ceramics to metals is a technical challenge with attractive economical consequences. In this study a ceramic coating was processed by plasma transferred arc (PTA). ZrO2–7wt.%Y2O3 powders were deposited on low carbon steel plates and on Ni based alloys layers previously welded on a steel plate. Coatings were evaluated regarding the soundness and features of the metal/ceramic bond. Results showed that the pair ZrO2–7wt.%Y2O3 /metallic alloy played a major role on the quality of the processed surfaces determining the effectiveness of the bonding. The presence of Al in the Ni based intermediate layer was detrimental to the adhesion of the ceramic coating. Deposition of ZrO2–7wt.%Y2O3 on NiCrFe intermediate layers allowed for a metal/ceramic bond resulting on 3,0mm thickness coatings. Ceramic deposits exhibited cracks, whose features were altered after a stress relief treatment of the substrate (AISI 1020+NiCrFe layer) prior to the deposition of ZrO2–7wt.%Y2O3. Transverse section analysis revealed the presence of second phase particles in the ceramic coating and the diffusion of elements from the intermediate Ni based layer into the ceramic deposit.
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Tateno, Masayoshi, Yohei Hatano, and Kunio Kokubo. "Effect of Interface Edge Shape on Bonding Strength in Ceramic to Metal Joint." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93255.
Selection of the optimum shape for interface edge can produce significant increases in the strength of bonded dissimilar materials such as ceramic to metal joints. The focus of this study is to clarify an effect of interface edge shape on bonding strength of ceramic to metal joint. Each plate Si3N4 to Ni joint with arc interface of convexity or concavity is produced by Electric Discharge machining. The arc interface is characterized by edge angle defined as a configuration angle between tangential line at the edge of the interface and the free surface of the ceramic. Each joint is bonded at high temperature by using thin braze metal under vacuum and slowly cooled. A good fit on each bonded face is achieved in this process. The dependence of the bonding strength on the edge angle is experimentally clarified. The result shows that changing the edge angle from the right angle improves the bonding strength since it decreases the residual stress near edge of the interface. The highest bonding strength always appears at the identical interface condition where fracture pattern changes. It appears that the optimum edge angle for obtaining the highest bonding strength depends on bonding temperature.
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Tateno, Masayoshi, and Eiichiro Yokoi. "Dependence of Bonding Temperature Conditions on Metal Thickness Effects in Bonded Dissimilar Materials." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45822.
This study provides information on the dependence of bonding temperature conditions on metal thickness effects in bonded dissimilar materials as a composite material system. Effects of metal thickness on the bonding strength were confirmed each bonding temperature condition by using silicon-nitride and nickel to confirm for each joint manufactured by a bonding method, two stages bonding process. This process used in this experiment consists of two stages, first bonding process as the ceramic is bonded to thin layer metal at high temperature, and secondary process as thick metal is bonded to the thin metal layer of the joint at lower temperature than first stage’s one. Bonding tensile strength of the joint specimen was evaluated experimentally. The bonding strength was dominated by the residual stress near the edge of the interface on ceramic side. The maximum bonding strength appears at optimum metal thickness. It shows that the optimum metal thickness depends on the first temperature condition. Reduction of the residual stress was considered based on the experimental and numerical results. Two stages bonding process can be applied for high strength bonded dissimilar materials as useful engineering application by setting optimum metal thickness each bonding temperature condition.
Звіти організацій з теми "Ceramic metal bonding":
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Freeman, A. J. Energetics, bonding mechanism and electronic structure of metal/ceramic interfaces. Office of Scientific and Technical Information (OSTI), January 1993. http://dx.doi.org/10.2172/7081085.
Freeman, A. J. Energetics, bonding mechanism and electronic structure of metal/ceramic interfaces. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/5652379.
Craven, S., D. Kramer, and W. Moddeman. Chemistry of glass-ceramic to metal bonding for header applications: 2. Hydrogen bubble formation during glass-ceramic to metal sealing. Office of Scientific and Technical Information (OSTI), December 1986. http://dx.doi.org/10.2172/6963554.
Freeman, A. J. Energetics, bonding mechanism and electronic structure of ceramic/ceramic and metal/ceramic interfaces. Annual progress report, April 1, 1994--September 30, 1994. Office of Scientific and Technical Information (OSTI), October 1994. http://dx.doi.org/10.2172/10185440.
Freeman, A. J. Energetics, bonding mechanism and electronic structure of ceramic/ceramic and metal/ceramic interfaces. Annual progress report, April 1, 1993--March 31, 1994. Office of Scientific and Technical Information (OSTI), March 1994. http://dx.doi.org/10.2172/10134458.
Freeman, A. J. Energetics, bonding mechanism and electronic structure of metal/ceramic interfaces. Annual progress report, April 1, 1991--March 31, 1992. Office of Scientific and Technical Information (OSTI), May 1992. http://dx.doi.org/10.2172/10140444.
Freeman, A. J. Energetics, bonding mechanism and electronic structure of metal/ceramic interfaces. Annual progress report, April 1, 1992--March 31, 1993. Office of Scientific and Technical Information (OSTI), December 1993. http://dx.doi.org/10.2172/10185416.
Moddeman, W., W. Jones, T. Koeller, S. Craven, and D. Kramer. Chemistry of glass-ceramic to metal bonding for header applications: III. Treatment of Inconel 718 to eliminate hot cracking during laser welding. Office of Scientific and Technical Information (OSTI), April 1987. http://dx.doi.org/10.2172/6454838.
