Tesi sul tema "Ceramic metal bonding"
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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.
Testo completoZbären, 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.
Testo completoPilz, 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.
Testo completoKhene, Karim. "Joining of advanced ceramics to metals". Thesis, Nottingham Trent University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271212.
Testo completoSuansuwan, 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.
Testo completoMcDermid, 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.
Testo completoKhmaj, 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.
Testo completoMonehi, 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.
Testo completoDissertation (MChD)--University of Pretoria, 2014.
tm2015
Orthodontics
MChD
Unrestricted
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.
Testo completoBond, 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.
Testo completoMatsushita, Yoshiaki. "Diffusion bonding of silicon nitride to metals". Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333487.
Testo completoMoseley, Steven Glyn. "The diffusion bonding of ceramics to metals by hot isostatic pressing". Thesis, University of Sheffield, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364380.
Testo completoContri, Boris. "Procédés d’assemblages céramique – métal : étude des couples Inconel®625 – Alumine et Titane Zirconium Molybdène (TZM) – Carbure de silicium". Electronic Thesis or Diss., Limoges, 2023. http://www.theses.fr/2023LIMO0093.
Testo completoThis work has for objective to present the results obtained for the ceramic-metal bonding by hot-pressing in two cases: Inconel®625 / Alumina and TZM / Silicon carbide. All the thesis take place according to the last results obtained for similar bonding, in the laboratory IRCER, by studying the feasibility of direct bonding and bonding after pre-oxidising the metal part. A part of this study is then dedicated to the oxidation behaviour of inconel®625 under CO2 using a thermobalance with a sample hot introduction. Using the oxidation kinetics obtained, the reaction mechanism is proposed and the conditions for the metal pre-oxidation determined.Then during the manuscript are presented the processes and the results obtained after variations of parameters such as temperature and the heat treatment time for the two couples of materials. The absence of inter-phase formation in the couple Inconel®625 / Alumina and the formation of a complex inter-phase in the couple TZM / Silicon carbide allow us to propose two studies with different metal-ceramic bonding.A last part is dedicated to the characterization and the understanding of the bonding obtained in each case. To explain the properties of the samples obtained we used scaning electron microscopy but also numerical simulation for the first couple Inconel®625 / Alumina and tensile test for the second couple TZM / Silicon carbide
Caboche, Juline. "Développement d’assemblages brasés céramique-métal à haute tenue en température dans un environnement agressif". Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLEM076.
Testo completoAerospace technology developments are blooming. Since the 1960’s the Turbine Entry Temperature for aero-engines gas turbines keeps rising to improve their efficiency. Sensors working close to the combustion chamber are required in order to master the turbine performances. This results in an industrial urge to develop ceramic-to-metal assemblies able to endure severe engine environment (>1100°C under air, vibrations, etc.)The choice of an alumina as the ceramic part ensures a good insulation at high temperature. The main issue remains the metallic material which must be refractory, resistant to oxidation and affordable. The application of a ternary carbide (phase MAX) is tested. The braze alloy composition is adjusted to each system so as to provide a good ductility, thermal stability and a metallurgical matching as regards dissolution and brittle compounds formation.Braze alloys based on the Au-Pd-Pt system are investigated. The aforesaid liquidus and solidus surfaces are defined from experimental measures. Diffusion, dissolution and inter-granular penetration at the metal/braze alloy interface are described to suggest improvements. Aluminum diffusion from alumina-forming materials towards the braze alloy is the dominant phenomenon during brazing, despite the use of a diffusion barrier. The use of noble materials for the metallic substrate is mandatory.Geometrical and chemical assembly parameters are defined for selected brazed system based on the physicochemical interactions occurring during brazing and aging under air. The best brazed assemblies present an excellent hermeticity after brazing. Thermal cycling aging in severe conditions is detrimental to ceramic-braze alloy bonding, leading to interfacial cracks. Two promising strategies are suggested to ensure a reliable ceramic-to-braze alloy bonding during thermal cycling
Buranadham, Supanee. "Dowel design optimization in an endodontically treated single-rooted tooth a finite element stress analysis /". Diss., University of Iowa, 2000. http://ir.uiowa.edu/etd/191.
Testo completoSupervisor: Clark M. Stanford. Title-page, preliminaries, Certificate of approval, Table of contents and Project summary issued in paper (xii, 13 leaves ; 28 cm.). Includes bibliographical references. Also issued on CD-ROM (144 files, 33.7 megabytes).
Liljenborg, Linnea, e Ghinwah Chaaban. "Bindningsstyrka mellan komposit och porslin för metallkeramik med förbehandling av olika reparationssystem". Thesis, Malmö universitet, Odontologiska fakulteten (OD), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-42863.
Testo completoPurpose: The purpose of this study is to investigate different repair systems and their bond strength to porcelain for metal-ceramic constructions. Material and method: Metal were manufactured by CAD / CAM in CoCr (5.0x5.0x15.0mm), was pretreated with sandblasting (alumina, 250 µm), steam blasting, oxidation, sandblasting and steam blasting. Feldspar porcelain was applied according to the following steps: opaque, dentin, enamel, selfglaze to a final porcelain height of 1.2 ± 0.2 mm. The porcelain surfaces were groud with silicon carbide sandpaper, 600-, 800-, 1200-grain size. Five groups (n = 15) in a total of 75 specimens. Adhesives and composite materials were applied to each group according to the instructions of the various manufacturers (Kuraray, Kulzer, Voco, Ivoclar, Ultradent, Etching with hydrofluoric acid). All specimens were thermocycled (5000 cycles) in two water baths between 5 ° C and 55 ° C before and after application of composite material. Shear bond strength test was performed on all specimens with a load speed of 0.5 mm / min and the bond strength was reported in MPa. Fracture analysis was performed where the fracture surfaces were divided into adhesive, cohesive or mixed fracture. The results were analyzed with one-way ANOVA, Tukey´s test with significance level α= 0.05. Result: The result clearly showed that hydrofluoric acid had a significantly higher bond strength of 11.32 ± 4.28 MPa compared to the other groups (p <0.01). The mean value of the other groups was between 2.61 ± 1.36 to 3.96 ± 2.85 MPa, with no significant difference between the groups. All groups had adhesive fractures, but the Voco-group also showed mixed fractures. Conclusion: The study concludes that all repair systems have a low bond strength and based on the results can’t be recommended. Pretreatment of the porcelain surface with hydrofluoric acid in combination with silan results in the highest bond strength to composite, the bond strength is still too low for long-term use, but the only one that can be recommended. However hydrofluoric acid is highly toxic which require further research in the field in order to develop reparation systems with suitable properties.
JIAN, WEN-SHENG, e 簡文勝. "Interfacial phenomenon in ceramic-metal bonding". Thesis, 1988. http://ndltd.ncl.edu.tw/handle/12291308586348952533.
Testo completoLiu, Yu-Jin, e 劉于菁. "Comparison of the Bonding Strength of Traditional Porcelain Fused to Metal vs. Press-on-Metal Ceramic". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/19685724085520570624.
Testo completo中山醫學大學
口腔材料科學研究所
102
Computer-aided design and computer-aided manufacturing (CAD/CAM) all-ceramic crowns have become popular dental prosthesis in recent years. However many patients still need to rely on porcelain fused to metal (PFM) crown restoration due to their clinical conditions. There has been a new technique called Press-on-Metal (POM) that has gradually become widely accepted in the market. The production process of POM differs from the traditional PFM. Apart from being more time-saving in the fabrication process, POM also offers another treatment option to both the dentist and technician in clinical practice. Nevertheless whether the bonding strength of porcelain to metal win POM is similar to the traditional PFM and whether POM restorations can withstand temperature changes in the mouth are still yet to be investigated. The purpose of this study was to compare the traditional feldspathic ceramic, and die-cast key leucite ceramic and three different metals knot strength. According to ISO9693 (1999) standard, making rectangular resin pattern 60, test pieces were cast metal (gold alloy, palladium and cobalt-chromium alloy), respectively, then the respective test pieces sticking tiles metal (PFM cum control group), and a hot ceramic plate (POM group), followed by three-point bending test. Three-point bending tests were further performed after 20,000 thermal cycles. The results showed that the control group of gold alloys and ceramics had the highest bond strength (Au-F) 50.19 MPa (p<0.05), followed by palladium alloys and nickel-chromium alloys; while the POM group palladium alloy (Pd-P) had the lowest bond strength 36.91MPa (p>0.05). Experimental results show that 20,000 times before and after thermal cycling, the PFM Group of different metal-ceramic specimen bond strength was significantly lower (p<0.05), while no significant difference POM group (p>0.05), hot and cold cycles on the bond strength of the specimen has a significant impact. Looking at all the tests results, the conclusion is that although the bond strength using POM method of making the test piece is not superior to PFM, but the bond strength POM method of specimen in line with ISO9693 standards, so the dentists and dental technicians and patients economic considerations, POM law will be one of the clinical method of prosthetic treatment options.
Chen, Chun-Fei, e 陳春斐. "Effects of Different Thickness of Metal on Flexural Bonding Strength of Titaium-ceramic". Thesis, 1998. http://ndltd.ncl.edu.tw/handle/42895658039859114632.
Testo completo中山醫學院
口腔醫學研究所
86
Titanium and its alloys have been widely used in dentistry because of their excellent biocompatibility and corrosion resistance. In addition, its low specific gravity, high strength, low thermal conductivity have made this metal as an alternative metal used for dental prostheses. The purpose of this study was to evaluate the effect of metal thickness of cp titanium on the flexural bond strength of ceramic to cp titanium. In cast specimens of cp titanium Grade II (Group I) and Grade III (Group II), wax patterns of different thickness (subgroup: 0.3, 0.5, 0.7 and lmm) were made and in Ni-Cr-Be alloy (Group III) cast specimens, those of different thickness (subgroup: 0.3 and 0.5mm) were prepared. Fifteen specimens were made in each thickness of metal. The fired square-shaped porcelain layer covered a central portion of one side of a metal surface for a total thickness of 1.0mm ceramic thickness achieved. Titanium specimens/Tibond ceramic (Dentsply DeTrey GmbH, Greieich) and Ni-Cr-Be alloy specimens/Will-Cream ceramic (Williams, Ivoclar North America Inc, USA) combinations were used. The specimens were subjected to Three-point bending test, and the load of bond failure was recorded. The surface of each debonded specimens were examined and photographed to determine the mode of bond failure. A two-way ANOVA followed by a Scheff's analysis was to analyze the data. There was no statistically significant difference of flexural bond strength between Ti II and Ti III specimens (P>0.05). The metal thickness of cp titanium, either Grade II or Grade III, do effect the flexural bonding strength of c.p. titaniumceramic(P<0.05). There were no statistically significant difference (P>0.05) of the metal-ceramic flexural bonding strength among Ti II, III (10.mm) and Ti II, III(0.7mm) specimens,but Ti II, III(1.0 and 0.7mm) were significantly stronger than Ti II, III (0.3mm) specimens (P>0.05). The flexural bonding strength of Ni-Cr-Be (0.5mm) specimens were stronger than Ti Grade II, III (0.7mm) specimens but there was no statistically significant difference (P>0.05). The study of the interfaces between ceramic and alloys was done by scanning electron microscopy (SEM) and energy dispersive X-ray spectrometer (EDS). It is observed that the anchor points were found in the Ni-Cr-Be alloy-ceramic interface, and the both fracture types, i. e., cohesive and adhesive type, were coexistent in its fracture surface. Compared to the Ni-Cr-Be alloy, the fracture of c. p. titanium-ceramic interface after bending test revealed that the fracture is adhesive type dominantly. It was concluded that metal thickness of cp titanium, either Grade II or Grade III, will effect the flexural bond strength of cp titanium, either Grade III, will effect the flexural bond strength of cp titanium-ceramic and the minimum of metal thickness was recommended as 0.5mm to be used on cp titanium-ceramic system.
CAI, CHANG-XU, e 蔡長旭. "The study of the shear bonding strength of the base metal-ceramic crown and bridge:the difference of shear bonding strength and distribution of elements in interface of alloy matrix-bonding agent-porcelain layers in use of two bonding agents, two procelai". Thesis, 1991. http://ndltd.ncl.edu.tw/handle/22825224360949427834.
Testo completoGeetha, K. "Joining Of Alumina Ceramics". Thesis, 1999. https://etd.iisc.ac.in/handle/2005/1694.
Testo completoGeetha, K. "Joining Of Alumina Ceramics". Thesis, 1999. http://etd.iisc.ernet.in/handle/2005/1694.
Testo completoMai, Stéphanie H. "Indirect Bonding Method: in vitro Comparison of the Shear Bond Strength between Metallic Orthodontic Brackets and Different Porcelain Surface Preparations". Thèse, 2013. http://hdl.handle.net/1866/10082.
Testo completoBackground : Bond strength at the metal-ceramic interface of auto-polymerizing resins used in orthodontic indirect bonding has not yet been evaluated and a literature-based clinical protocol is lacking. Goals : 1) To compare shear bond strength (SBS) between metal brackets and differently treated porcelain surfaces; 2) To suggest efficient and predictable chairside approaches. Materials and methods : Ninety leucite discs (6 groups; n=15/group) were prepared following 6 combinations of mechanical (+/- bur roughening) and chemical (hydrofluoric acid, primer, silane) treatments. Metal brackets with custom composite resin Transbond XT (3M Unitek, Monrovia, California) bases were bonded with the adhesive resin system Sondhi A+B Rapid Set (3M Unitek, Monrovia, California). Samples were stored (H2O/24hrs), thermocycled (500 cycles) and tested (Instron, Norwood, Massachusetts). Maximum SBS and adhesive remnant index (ARI) scores were collected for each sample. ANOVAs were performed on ranks since data was not normally distributed, and then adjusted with the post-hoc Tukey method. A Kruskall-Wallis, a Mann Whitney U pairwise comparison and a Weibull analysis were also performed. Results : SBS medians of groups ranged from 17.0 MPa (- bur + hydrofluoric acid) to 26.7MPa (- bur + hydrofluoric acid + silane). Bur roughening did not affect bond strength. The chemical preparation of (- bur + primer + silane) showed statistically significant higher SBS than (- bur + hydrofluoric acid) preparation (p<0,05), while having similar SBS to the popular recommended protocol (- bur + hydrofluoric acid + silane). ARI scores were statistically significant lower in group (- bur + hydrofluoric acid) with p<0,05, while all other 5 groups were not different from each other. Percentage of porcelain damage in these 5 groups were very high at 80-100%. Conclusion : All the tested surface preparations combinations provided clinically adequate adhesion for orthodontic tooth movement. A silane and primer combination for porcelain surface preparation is clinically attractive as it is safe and simple and provides great adhesion for orthodontic tooth movement. It is wise to warn patients that there is a risk of porcelain fractures when debonding brackets. If one prefers to avoid porcelain fracture at all cost, one may treat porcelain with hydrofluoric acid only.