Dissertations / Theses on the topic 'Bonding'
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Clarke, D. E. "Bonding in cokes." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372550.
Full textHodgson, Michael John. "Bonding in semiconductors." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240971.
Full textXu, Hui. "Thermosonic ball bonding : a study of bonding mechanism and interfacial evolution." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6325.
Full textCornes, Stuart. "Halogen bonding, hydrogen bonding and Lewis acidic receptors for anion recognition." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:0725f9c4-ff44-4158-b94e-9bcaf0fa3b4d.
Full textChen, Xi. "Designing Acrylic Block Copolymers with Multiple Hydrogen Bonding or Multiple Ionic Bonding." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/84961.
Full textMaster of Science
Rix, Douglas. "Bond strengths and fluoride release of modified glass ionomer and resin adhesives." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ39873.pdf.
Full textJohnsen, Bernt Brønmo. "Adhesive bonding of aluminium." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-515.
Full textIn order to get approval of adhesive bonding as a reliable joining method in the automotive industry, a better understanding of the interfacial interactions between aluminium surfaces and adhesives is important. It is also important to get a better understanding of the degradation mechanisms of the bonded systems in humid environments, as humidity is known to have a detrimental effect. This work has been focused on an aluminium alloy and a one-component epoxy adhesive that are of particular interest to the automotive industry.
Pretreatment of the aluminium substrates before adhesive bonding is essential. However, the most successful pretreatment processes involve the use of hexavalent chromium, which will be banned from use within few years due to environmental considerations. Alternative pretreatments need to be developed. A literature study identified silanisation with GPS as a pretreatment method with the potential to obtain good durability. On the basis of research performed by SINTEF Materials Technology, AC anodising in hot phosphoric and sulphuric acid solutions were also identified as interesting pretreatment methods.
A modified version of the Boeing wedge test was used to determine the durability of adhesively bonded joints tested in hydrothermal environments. The joints were made of AA6060-T6 aluminium alloy and Betamate XD4600 epoxy adhesive. Both silane films and anodic oxides were investigated using reflection-absorption FT-IR spectroscopy. Other techniques of surface analysis were also used (SEM, TEM, WLI, XPS, ToF-SIMS and contact angle measurements).
The environmental durability of pretreated AA6060-T6 substrates was significantly improved after silanisation with GPS. The grit-blasting + GPS pretreatment process resulted in considerable higher durability then the chromic-sulphuric acid FPL-etch. The general understanding is that silanisation improves the durability through the formation of strong, covalent bonds between the aluminium surface and the adhesive. FT-IR spectroscopy strongly indicated that a chemical reaction took place between GPS films and amine curing agents. Particularly interesting was the reaction with dicyandiamide, which is a common curing agent in one-component epoxy adhesives. The amines also catalysed the condensation of SiOH groups, resulting in higher degree of SiOSi crosslink density in the siloxane films. However, chemical reaction is not necessary for improved durability. The hydrophobicity of the bonded surface is also an important factor. This effect has not been studies extensively earlier.
Exposure of GPS films to degrading environments showed that the silane desorbed from the surface in acidic solutions, but it was stable in alkaline solutions. The durability of adhesive joints was also reduced in acidic environments. The two models for the degradation of the silanised aluminium surface in acidic environments were proposed: hydrolysis of the siloxane network and corrosion of the underlying aluminium surface.
The environmental durability of substrates that were AC anodised in hot phosphoric and sulphuric acid solutions was good, almost as good as the well-established FPL + PAA pretreatment. DC anodising in sulphuric acid gave inferior durability. FT-IR spectroscopy showed that the anodic films formed in sulphuric acid contained significant amounts of sulphate. This can have a significant negative effect on the long-term properties of bonded joints. The anodic films released water during curing of the adhesive. The observations suggested that a transformation from the hydroxide to the oxide state took place.
Adhesive bonding in wet environment of substrates that were anodised in sulphuric acid had a negative effect on durability. The effect was more pronounced for DC anodised, than for AC anodised substrates. Bonding in wet environment also resulted in changed adhesive properties close to the oxide surface. Very little thixotropic agent was present in a ~200 nm wide region in the adhesive. This was explained by desorption of water from the oxide during curing of the adhesive.
Papers II, V and VI are reprinted with kind permission of Elsevier, sciencedirect.com.
Joshua, Nilmini Sureka, University of Western Sydney, and Faculty of Science and Technology. "Novel phosphate bonding composites." THESIS_FST_XXX_Joshua_N.xml, 1997. http://handle.uws.edu.au:8081/1959.7/282.
Full textDoctor of Philosophy (PhD)
Joshua, Nilmini Sureka. "Novel phosphate bonding composites /." View thesis, 1997. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030828.115030/index.html.
Full textWang, Xiaowei. "Adhesive bonding of polypropylene." Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247559.
Full textDray, A. E. "Diffusion bonding of aluminium." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382557.
Full textCrankshaw, Donald S. (Donald Shane) 1974. "Aligned GaAs pillar bonding." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/46170.
Full textTudryn, Carissa Debra 1978. "Characterization of anodic bonding." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/27145.
Full textIncludes bibliographical references (p. 149-151).
Anodic bonding is a common process used in MicroElectroMechanical Systems (MEMS) device fabrication and packaging. Polycrystalline chemical vapor deposited (CVD) silicon carbide (SiC) is emerging as a new MEMS device and packaging material because of its excellent material properties including high strength, hardness, and thermal conductivity. An alternative, low temperature glass to CVD SiC anodic bonding process is required in order to prevent gold tin braze stress relaxation. A novel process recipe, requiring a SiC RMS surface roughness of 45nm, was developed for anodically bonding CVD SiC to bulk and thin-film, lapped Pyrex[TM] and Hoya SD-2[TM] glass substrates. The bond quality, residual curvature, and microstructured interfacial features for CVD SiC anodic bonding were shown to be comparable to single crystal silicon (Si) anodic bonding. The Plaza Test specimen, invented by Plaza et al., was used to assess bulk and thin-film, lapped glass bond quality. A two-part contact/bonding model was used to predict the contact and bonding of the Plaza Test structures. Surface contact was predicted by a parallel plate capacitor pull-in model after the voltage was applied, and linear elastic fracture mechanics (FEA) modeling predicted the toughness or work-of-adhesion of the bonded surfaces after the formation of a permanent silicon dioxide bond. The role of the voltage, structure geometry, work of adhesion, and materials used in the model predicted that the bonding mechanism limited the total number of structures that remained bonded. thin-film, lapped glass bond quality improved when increasing the voltage and time. The calculated, experimental, and modeled thermoelastic curvatures were minimal, indicating low residual stress
(cont.) between the bonded materials. Finally, microscopy and elemental analysis showed distinct differences in elemental depletion band(s) of bulk Pyrex[TM] and Hoya SD-2[TM] glasses bonded to Si, and in interfacial bonding between Pyrex[TM] and CVD SiC compared to Pyrex[TM] and Si. More elements in the glass network are identified as participating in the depletion layer process than identified in previous studies. Overall, the process recipes, modeling, experimental work, and chemical analysis of glass to CVD SiC anodic bonding showed that CVD SiC can be bonded successfully and be a promising packaging material.
by Carissa Debra Tudryn.
S.M.
Chen, Xi. "Exploring Multiple Hydrogen Bonding and Ionic Bonding in the Design of Supramolecular Polymers." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/98729.
Full textDoctor of Philosophy
This dissertation focuses on designing supramolecular thermoplastic elastomers containing strong noncovalent interactions, i.e., quadruple hydrogen bonds or double ionic bonds. Inspired from noncovalent interactions in our mother nature, a series of bio-inspired monomers functionalized with nucleobase or ionic units were synthesized through scalable reactions with minimal purification steps. Polymerization of the functional monomers through step-growth or chain-growth polymerization techniques affords a variety of supramolecular thermoplastic elastomers with well-defined structures and architectures. These thermoplastic elastomers comprise soft and hard constituents; the former contains low glass transition polymer chains that provide elasticity while the latter contains strong noncovalent units to impart mechanical strength. Varying the soft/hard component ratios enables polymers with tunable physical properties to address different needs. Systematic characterizations of these supramolecular polymers revealed their distinct properties from the polymers containing the covalent or weak noncovalent interactions and facilitate molecular-level understanding of the polymers. Generally, incorporating strong noncovalent interactions increases the temperature for polymer segmental motion and extends thermomechanical plateau windows. Additionally, the strong association strength of those non-covalent interactions promotes microphase separation and self-assembly, contributing to a high degree of structural ordering of the polymers. Moreover, the dynamic characteristics of the noncovalent interactions offer the polymers with reversible properties, which not only enables melt-processability and recyclability of the polymer but also contributes to a series of smart properties, including self-healing, shape-memory, and recoverability. Thus, the molecular design using supramolecular chemistry provides promising avenues to developing functional materials with enhanced mechanical properties, processability, and stimuli-responsiveness for emerging applications.
Fritz, Mark A. Cassidy Daniel Thomas. "Die bonding of diode lasers /." *McMaster only, 2004.
Find full textToprak, Filiz. "Mine Reclamation Bonding And Regulation." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605509/index.pdf.
Full texts conditions and by providing key concepts in the inception of a draft regulation concerning mine reclamation as part of the EU accession program.
Edmonds, Hannah. "Interlaminar bonding in ultrasonic consolidation." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/10999.
Full textMitchell, John Blayney Owen. "Theoretical studies of hydrogen bonding." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358697.
Full textHaller, Lars Jonas Larsson. "Theoretical studies of actinyl bonding." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/1444217/.
Full textMondal, Raju. "Systematic studies of hydrogen bonding." Thesis, Durham University, 2004. http://etheses.dur.ac.uk/2986/.
Full textSagar, Rajeeve. "Self-assembly via hydrogen bonding." Thesis, University of Warwick, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247352.
Full textMaddrell, Ewan Robert. "Diffusion bonding of aluminium alloys." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317935.
Full textStenhouse, Henry G. "Direct bonding dissimilar optical materials." Thesis, University of Southampton, 2018. https://eprints.soton.ac.uk/420653/.
Full textJudge, Benjamin Michael. "Thermoplastic bonding of microfluidic substrates." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78165.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 103-108).
The assembly of microfluidic components for lab on a chip (LOC) applications that are manufactured from commodity thermoplastics is challenging. A survey of plastic welding techniques validates that contour transmission laser welding is the most viable and commercially demonstrated option for flexibility and sensitive microfluidic tolerances. However, understanding laser energy transmission and absorption phenomenon further complicates analyzing microfluidic thermoplastic welding, since the instantaneous material properties vary with both temperature and pressure. Thermoplastic welding has steep thermal gradients due to high thermal resistances, resulting in asymmetric heat affected zones (HAZ). Welding fixture sensitivities may be engineered to tune the weld energy required and a desired HAZ bias to reduce microfluidic channel deformation. Energy imparted by resistively heating thin implants can be easily measured and observed. Resistive heating of implants was demonstrated as a low energy, parallel, and feasible microfluidic welding assembly process. Lessons from implant heating can be applied to more complicated but analogous processes.
by Benjamin Michael Judge.
M.Eng.
Van, Helvoort Antonius Theodorus Johannes. "Microstructural characterisation of electrostatic bonding." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619583.
Full textCristescu, Carmen. "Self-bonding of beech veneers." Doctoral thesis, Luleå tekniska universitet, Träteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18315.
Full textGodkänd; 2015; 20150825 (carmen); Nedanstående person kommer att disputera för avläggande av teknologie doktorsexamen. Namn: Carmen Cristescu Ämne: Träteknik/Wood Technology Avhandling: Self-Bonding of Beech Veneer Opponent: Professor Mark Hughes, Department of Forest Products Technology, Aalto School of Chemical Technology, Aalto University, Helsingfors, Finland Ordförande: Professor Dick Sandberg, Avd för träteknologi, Institutionen för teknikvetenskap och matematik, Luleå tekniska universitet, Skellefteå Tid: Onsdag 23 september 2015, kl 10.00 Plats: Luleå tekniska universitet, Hörsal A i Skellefteå
Norris, Paul Richard. "Studies in metal-ligand bonding." Thesis, University of Surrey, 1996. http://epubs.surrey.ac.uk/844071/.
Full textChurch, William Travis. "Laser Activated Bonding of Wood." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/76888.
Full textMaster of Science
Scott, Tianeka S. "Understanding Hydrogen Bonding in Photoenolization." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378196534.
Full textThote, Amol Janardan Gupta Ram B. "Molecular bonding in product engineering." Auburn, Ala., 2005. http://hdl.handle.net/10415/1275.
Full textMcAdon, Mark Herbert Goddard William A. "New concepts of metallic bonding." Diss., Pasadena, Calif. : California Institute of Technology, 1988. http://resolver.caltech.edu/CaltechTHESIS:10302009-113153689.
Full textAdvisor names found in the Acknowledgments pages of the thesis. Title from home page. Viewed 01/20/2010. Includes bibliographical references.
Fiore, Daniel F. "High strength bonding of sapphire." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-0829102-155924.
Full textStross, Alexander. "Synthetic H-bonding information oligomers." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/12365/.
Full textArman, Hadi D. "Strategies for expanding the halogen bonding periodic table and designing complementary halogen/hydrogen bonding synthons." Connect to this title online, 2008. http://etd.lib.clemson.edu/documents/1219848304/.
Full textTaber, Keith. "Understanding chemical bonding : the development of A level students understanding of the concept of chemical bonding." Thesis, Roehampton University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246174.
Full textBende, David. "Chemical Bonding Models and Their Implications for Bonding-Property Relations in MgAgAs-Type and Related Compounds." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-201406.
Full textKodokian, George-Kevork. "Adhesive bonding of thermoplastic fibre-composites." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/8815.
Full textHoward, Daryl L., and n/a. "Hydrogen bonding in the near infrared." University of Otago. Department of Chemistry, 2006. http://adt.otago.ac.nz./public/adt-NZDU20060823.150321.
Full textMills, Allison M. "Bonding patterns in new intermetallic antimonides." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ60327.pdf.
Full textBiemond, Gerard Jan Eduard. "Hydrogen bonding in segmented block copolymers." Enschede : University of Twente, 2006. http://doc.utwente.nl/51102.
Full textHung, Cheung-sing Tony. "Bonding of dental alloys to enamel." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/HKUTO/record/B39558150.
Full textYan, Ping. "Diffusion bonding of titanium aluminide (TiAl)." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241177.
Full textTaylor, Russell Alan. "Hydrogen bonding effects in homogeneous catalysis." Thesis, Imperial College London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500138.
Full textThomson, Patrick. "Extremely strong contiguous hydrogen bonding arrays." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7856.
Full text孔祥陞 and Cheung-sing Tony Hung. "Bonding of dental alloys to enamel." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B39558150.
Full textEkambaram, Manikandan. "Aspects of solvents in dentine bonding." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2015. http://hdl.handle.net/10722/208591.
Full textpublished_or_final_version
Dentistry
Doctoral
Doctor of Philosophy
Critchlow, Gary W. "Pretreatments for metal-to-metal bonding." Thesis, Loughborough University, 1997. https://dspace.lboro.ac.uk/2134/7525.
Full textHassani, Seyed Khosrow Seyed. "Isostatic bonding of pressed ceramic materials." Thesis, Queen's University Belfast, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334709.
Full textTrewin, Abbie. "Bonding at the carbon-metal interface." Thesis, University of Liverpool, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428221.
Full textLocke, Christopher John. "Competitive hydrogen bonding in polymeric systems." Thesis, University of York, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259805.
Full text