Relevant bibliographies by topics / Exfoliation

Academic literature on the topic 'Exfoliation'

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Published: 4 June 2021
Last updated: 25 May 2024

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Journal articles on the topic "Exfoliation"

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Kılıç, Raşit, Hafize Sezer, Sebile Ü. Çomçalı, Serdar Bayraktar, Gökay Göktolga, Yasin Çakmak, Abdi B. Çetin, and Tongabay Cumurcu. "The Frequency of Exfoliation Syndrome in the Central Anatolia Region of Turkey." Journal of Ophthalmology 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/139826.

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Aim. The aim of this study was to investigate the frequency of exfoliation syndrome in the Central Anatolia region of Turkey and to evaluate its relationship with cardiovascular and ocular diseases.Methods. Patients over the age of 45 years who presented to the clinic were included in the study. All cases underwent a comprehensive ophthalmology examination. Exfoliation syndrome was diagnosed with the presence of exfoliative material on the lens anterior capsule or iris on slit lamp examination. The patients were divided into two groups as the exfoliation syndrome group and nonexfoliation syndrome group according to the presence of exfoliative material.Results. Exfoliative material was found in one or both eyes of 212 of the 2103 patients (10.1%) evaluated within the scope of the study. A significant relationship was found between exfoliation syndrome and increasing age and male gender. A significant relationship was found between exfoliation syndrome and glaucoma, cataracts, age-related macular degeneration, and phacodonesis. While no relationship was found between exfoliation syndrome and hypertension or diabetes mellitus, a significant relationship was found with coronary artery disease.Conclusion. The unilateral or bilateral exfoliation syndrome frequency was 10.1% in this hospital-based study. A statistically significant relationship was found between exfoliation syndrome and advancing age, gender, and coronary artery disease.
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Ozates, Serdar, Kadriye Ufuk Elgin, Niyazi Samet Yilmaz, Ozlem Ozbas Demirel, Emine Sen, and Pelin Yilmazbas. "Evaluation of oxidative stress in pseudo-exfoliative glaucoma patients treated with and without topical coenzyme Q10 and vitamin E." European Journal of Ophthalmology 29, no. 2 (June 5, 2018): 196–201. http://dx.doi.org/10.1177/1120672118779486.

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Purpose: To evaluate the levels of oxidative stress markers such as superoxide dismutase and malondialdehyde in eyes with pseudo-exfoliative glaucoma treated with and without topical coenzyme Q10 (CQ10) and vitamin E (Coqun drop). Methods: This prospective, randomized clinical study was conducted on 64 eyes of 64 patients. All patients underwent phacoemulsification and intraocular lens implantation surgery. Aqueous humor samples were aspirated from the anterior chamber at the beginning of cataract surgery. The pseudo-exfoliative glaucoma + Coqun group received topical Coqun (100 mg CQ10, 500 mg Vitamin E TPGS) twice daily for 1 month preoperatively, while the pseudo-exfoliative glaucoma group consisted of pseudo-exfoliative glaucoma cases who had not taken Coqun. Pseudo-exfoliation syndrome cases formed the pseudo-exfoliation syndrome group. The main outcomes were the superoxide dismutase and malondialdehyde levels of aqueous humor in both groups. Results: The mean aqueous humor superoxide dismutase level was significantly higher in the pseudo-exfoliative glaucoma group than in pseudo-exfoliative glaucoma + Coqun and pseudo-exfoliation syndrome groups (p < 0.001, p = 0.004, respectively). Also, the mean aqueous humor superoxide dismutase level was significantly lower in the pseudo-exfoliation syndrome group than in pseudo-exfoliative glaucoma + Coqun group (p = 0.009). The mean malondialdehyde levels showed no significant difference between the groups (p > 0.05 for all). Conclusion: Our study showed lower aqueous humor level of superoxide dismutase in pseudo-exfoliation syndrome patients compared to pseudo-exfoliative glaucoma patients. Significantly lower superoxide dismutase level was observed in pseudo-exfoliative glaucoma patients who received topical Coqun compared to pseudo-exfoliative glaucoma patients without Coqun treatment. No significant change was observed on the malondialdehyde level during 1-month follow-up period.
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Elumalai, Satheeshkumar, Simahudeen Bathir Jaber, Suryanarayanan Chandrasekaran, and Makoto Ogawa. "An experimental and steered molecular dynamics simulation approach to histidine assisted liquid-phase exfoliation of graphite into few-layer graphene." Physical Chemistry Chemical Physics 22, no. 18 (2020): 9910–14. http://dx.doi.org/10.1039/d0cp01033b.

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Liu, Xinyi, Huan Chen, Jing Lin, Yi Li, and Liangqia Guo. "Exfoliation of transition-metal dichalcogenides using ATP in aqueous solution." Chemical Communications 55, no. 20 (2019): 2972–75. http://dx.doi.org/10.1039/c8cc10259g.

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Vesti, Eija, and Tero Kivelä. "Exfoliation syndrome and exfoliation glaucoma." Progress in Retinal and Eye Research 19, no. 3 (May 2000): 345–68. http://dx.doi.org/10.1016/s1350-9462(99)00019-1.

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Razak, Syaahidah Abdul, Hasliza Bahruji, Abdul Hanif Mahadi, and Hong Wan Yun. "H2O2 Exfoliation of TiO2 for Enhanced Hydrogen Production from Photocatalytic Reforming of Methanol." Bulletin of Chemical Reaction Engineering & Catalysis 17, no. 2 (May 17, 2022): 420–29. http://dx.doi.org/10.9767/bcrec.17.2.13920.420-429.

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Hydrogen is considered a future energy carrier for clean and sustainable technology. Photocatalytic reforming of methanol produced hydrogen using water and energy from sunlight. This study reported enhanced activity of TiO2 without metal co-catalyst for hydrogen production following H2O2 exfoliation. TiO2 was transformed into peroxo-titania species on the outer layer of the particles, resulting in surface exfoliation. The exfoliation reduced TiO2 crystallite sizes enhanced the surface hydroxyl group and reduced the band gap to 3.0 eV. Hydrogen production from methanol-water mixtures on the TiO2 after four consecutive exfoliations was measured at 300 µmol, significantly higher than the fresh TiO2 (50 µmol). H2O2 exfoliated TiO2 reduced the pathway for charge migration to the surface. A high concentration of surface hydroxyl group trapped the charge carriers for efficient hydrogen production. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
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Marsh, K. L., M. Souliman, and R. B. Kaner. "Co-solvent exfoliation and suspension of hexagonal boron nitride." Chemical Communications 51, no. 1 (2015): 187–90. http://dx.doi.org/10.1039/c4cc07324j.

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A simple method is presented for exfoliating and suspending hexagonal boron nitride using a co-solvent approach. A 60 w/w% concentration of tert-butanol in water is very effective at exfoliating boron nitride especially when compared to the individual components alone as indicated by UV-vis and transmission electron microscopy. Molecular weight and surface tension are found to play inverse roles in the exfoliation.
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Kim, Youngsoo, Athanasios Gkountaras, Odette Chaix-Pluchery, Isabelle Gélard, Johann Coraux, Claude Chapelier, Michel W. Barsoum, and Thierry Ouisse. "Elementary processes governing V2AlC chemical etching in HF." RSC Advances 10, no. 42 (2020): 25266–74. http://dx.doi.org/10.1039/d0ra00842g.

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MXenes are synthesized by chemically exfoliating well-defined V2AlC, single-crystal pillars. Exfoliation is studied as a function of orientation and time using HF. This reveals that no etching can take place by HF penetration through the basal planes.
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Xu, Fang Chao, and Kazuhiro Kusukawa. "Adhesion Strength of BNT Films Hydrothermally Deposited on Titanium Substrates." Advanced Materials Research 123-125 (August 2010): 399–402. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.399.

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Lead-free piezoelectric (Bi1/2Na1/2)TiO3 (BNT) films were deposited on 1 mm thick pure titanium(Ti) substrates by a hydrothermal method. Tensile tests were performed to quantitatively assess the adhesion strength between BNT films and Ti substrates. Ti substrates were pretreated by chemical polish and mechanical polish respectively prior to BNT film deposition. In the tensile test, the behavior of BNT film exfoliation was investigated by the replica method. The critical Ti substrate strain inducing BNT film exfoliation was determined by the aid of finite element analysis (FEM). In this study, the results revealed that BNT film exfoliations were caused by the strain of Ti substrate, and the mechanical polish pretreatment improved the adhesion of BNT film to Ti substrate.
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Sato, Hisaaki, Takao Watanabe, Kohichi Higuchi, Kuniaki Teruya, Ayumi Ohtake, Yasuko Murata, Hiroshi Saito, Chikara Aizawa, Hirofumi Danbara, and Nobutoshi Maehara. "Chromosomal and Extrachromosomal Synthesis of Exfoliative Toxin from Staphylococcus hyicus." Journal of Bacteriology 182, no. 14 (July 15, 2000): 4096–100. http://dx.doi.org/10.1128/jb.182.14.4096-4100.2000.

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ABSTRACT Evidence for the existence of two molecular species of exfoliative toxin (ET) synthesized by Staphylococcus hyicus (SHET) under chromosomal and plasmid control is presented. Serological evidence that these molecular species of toxins are distinct from each other is given. The molecular weights of SHET from plasmidless strain P-1 (SHETA) and from plasmid-carrying strains P-10 and P-23 (SHETB) were almost equal. Both of the serotypes of SHET exhibited exfoliation in 1-day-old chickens. The plasmid-cured (P−) substrains (P-23C1 and P-23C2) of S. hyicus P-23 did not cause exfoliation in 1-day-old chickens, whereas P−substrains (P-10C1 and P-10C2) of strain P-10 caused exfoliation, but they decreased their exfoliative activity. These findings suggest that SHETB was synthesized along with SHETA by strain P-10, whereas the P-23 strain synthesized SHETB alone. The plasmid-carrying strain (P-23) as well as the plasmidless strain (P-1) exhibited the typical clinical signs of exudative epidermitis in pigs. However, plasmid-cured (P−) substrains of P-23 (P23C1 and P23C2) did not exhibit the typical clinical signs of exudative epidermitis. These findings suggest that SHETA is synthesized under chromosomal control and SHETB is synthesized under plasmid control and that SHET-producing strains can be divided into three groups: SHETA-producing strains, SHETB-producing strains, and strains producing both toxins.
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Dissertations / Theses on the topic "Exfoliation"

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Avateffazeli, Maryam. "Characterization, Exfoliation, and Applications of Boron Nitride and Molybdenum Disulfide from Compressible Flow Exfoliation." University of Toledo / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1607085667908185.

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Nassar, Nashaat. "Melt exfoliation in montmorillonitepolystyrene nanocomposites." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19613.

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Polymer clay nanocomposites (PCN) exhibit many advantages over conventional composites, while using substantially smaller quantities of filler. For various reasons, it is desirable, in nanocomposite manufacturing, to employ processes based on melt exfoliation of modified clay particles. While various researchers have studied the effects of processing variables and material properties on the effectiveness of melt exfoliation, many issues remain unresolved. This study attempts to deal with some of these. In this study an amorphous polymer, atactic polystyrene (PS), has been chosen to avoid complications related to crystallization. Three grades of (PS), having different molecular weight, were pre-blended with Cloisite® 1OA (a modified montmorillonite) in a twin-screw extruder (TSE). The TSE blends were subsequently fed to a single screw extruder, fitted with one of three specially designed attachments at the front of the screw. The attachments were designed to provide combinations of shear and elongational deformations. The resins, TSE blends, and final nanocomposites were characterized for the degree of exfoliation, mechanical properties, and rheological behavior using capillary and rotational rheometers, FTIR, XRD and TEM. The effects of molecular weight, mixing time, and levels of shear and elongational stresses, on the degree of intercalation and the properties of the nanocomposites were studied. Surprisingly, the complex and shear viscosities of the nanocomposites were found to be lower than the corresponding viscosities of the virgin polystyrene. Intercalation was achieved with in a short residence time. However, the degradation of the clay intercalant increased with residence time which causes degradation of PS.
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Roscher, Sarah [Verfasser], and Oliver [Akademischer Betreuer] Ambacher. "Reduktive elektrochemische Exfoliation von Graphenflocken." Freiburg : Universität, 2020. http://d-nb.info/1221959921/34.

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Zhu, Xiaowen. "Exfoliation of Two-Dimensional Materials." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1428063152.

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Butler, Sheneve. "Exfoliation and Air Stability of Germanane." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366295898.

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Suter, Theo M. "Crystalline carbon nitrides : characterisation, intercalation and exfoliation." Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10045282/.

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In recent years there has been significant interest in, and research into, carbon nitride materials for use in applications such as photocatalysis. The most commonly described C/N materials are referred to as graphitic carbon nitride (gCN), though due to the layered amorphous nature structural characterisation is difficult. Polytriazine imide (PTI) is a crystalline layered carbon nitride that is less explored within the literature compared to gCN due to its more difficult synthetic procedure. In this thesis the synthesis, characterisation, intercalation chemistry and exfoliation of PTI is explored. The synthesis of a related material, triazine based graphitic carbon nitride (TGCN) is explored and the product characterised in detail. PTI refers to the carbon, nitrogen and hydrogen framework (C6N9H3) within which different ionic intercalants can be accommodated; then give rise to several different crystalline materials with the same underlying carbon nitride backbone. The structure of these crystalline, layered PTI was synthesised by reversibly removing and replacing the intercalated ions without affecting the carbon nitride structure. The structures of these new materials was investigated and how changing the intercalant can be used to tune the structures and properties. This methodology may facilitate the fine-tuning and optimisation of carbon nitrides for a number of applications. I have also explored the exfoliation of the layered PTI materials. A number of methods have been used including intercalation and ultrasonication. Remarkably, however I found that the PTI gently, and even spontaneously dissolves to form solutions in highly polar organic solvents and even in water. This process takes place without the need for mechanical mixing, sonication or centrifugation. The resultant separated nanosheets solutions are characterised indepth. Few layer stacks of undamaged crystallites are observed. The photoluminescence of the nanosheets have been found to depend on the number of stacked layers, presenting exciting opportunities for optoelectronic devices.
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Webb, Melanie. "Blistering and exfoliation of ion-implanted GaAs." Thesis, University of Surrey, 2005. http://epubs.surrey.ac.uk/844157/.

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This thesis investigates a technique of transferring thin layers of GaAs onto other substrates, called the ion-cut (or smart-cut) process. The process, and the progress that had already been made to optimise and understand it is described in detail in the first chapter, and the project aims are presented in the context of these developments. The following chapter describes the experimental setups used in this work, with the main techniques involving ion beam analysis, x ray diffraction and Nomarksi, atomic force and electron microscopy. The development of a new method for controlling the flux and temperature of implantation is described in this thesis, and is now available to other users of the Ion Beam Centre at the University of Surrey. A new method for interpreting the channelling RBS (Rutherford Backscattering Spectrometry) spectra in blistered samples has been developed, and is described in chapter 4. The results presented in this thesis show that the ion-cut process is dependent on the flux of ion implantation, and demonstrate that this can be explained in terms of the relative concentration of damage introduced by the ion implantation process. In addition, the role of implant temperature on the process has also been investigated in detail for the first time. Finally, the suitability of implanting helium or neon under different conditions instead of hydrogen has been investigated and it is shown that while helium is more effective than hydrogen (around half the dose is required for helium implantation compared with hydrogen), neon is not a suitable alternative. Such an investigation is essential for optimisation of this process, which has eclectic applications including the fabrication of lasers, solar cells and the integration of GaAs and silicon materials on a single chip.
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Petitjean, Dominique. "Synthèse et exfoliation de composés graphite-acide." Nancy 1, 1992. http://www.theses.fr/1992NAN10413.

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Le thème principal de ce mémoire est l'étude générale de l'exfoliation des composés graphite-acide nitrique, sulfurique, perchlorique. La synthèse et la caractérisation de ces composés sont présentées dans une première partie. L'étude du système graphite acide perchlorique commercial (70%) a été particulièrement développée. Les conditions d'insertion de cet acide sont précisées et les propriétés structurales et de transport : résistivité électrique, ont été abordées. L'exfoliation de ces composés est étudiée dans la seconde partie de ce travail. L'analyse des travaux antérieurs et les recherches expérimentales ont permis d'établir une classification des types d'expansion. Il est ainsi distingué et analysé l'expansion endothermique réversible obtenue par chauffage lent d'un composé d'insertion et l'exfoliation irréversible observée à la suite d'un chauffage à vitesse modérée ou rapide. Un nouveau mode d'exfoliation est étudié : l'expansion par décompression brusque. Des mécanismes de l'exfoliation sont présentés et l'influence de divers paramètres discutés. Les recherches expérimentales se sont poursuivies par l'étude de l'exfoliation exothermique qui est obtenue soit par voie chimique en phase liquide, soit par chauffage d'un composé dont l'espèce intercalée est instable thermiquement.
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Trantow, Colleen. "Genetic pathways of Lyst and exfoliation syndrome." Diss., University of Iowa, 2009. https://ir.uiowa.edu/etd/896.

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Human eyes with exfoliation syndrome (XFS) exhibit a distinctive pattern of iris transillumination defects that are recapitulated in Lyst mutant mice carrying the beige allele. Here I present the identification and characterization of the B6-Lystbg-J mouse model of XFS, modifiers of Lyst mediated ocular phenotypes, mechanisms of intraocular pressure (IOP) pathology related to circadian rhythms, and mechanisms of iris transillumination defects in the B6-Lystbg-J mice. Clinical and histological analysis shows that the B6-Lystbg-J mice have multiple similarities to human XFS including: iris transillumination defects, production of an exfoliative-like material, and pronounced pigment dispersion. Despite these insults, Lyst mutation does not cause increased IOP or optic nerve damage within the context of a C57BL/6J genetic background. However, defects in the circadian rhythm regulation of IOP were identified. Sequence analysis identifies that the beige mutation is predicted to delete a single isoleucine from the WD40 domain of the LYST protein. I identified CSNK2B as a binding partner of LYST and showed that LYSTbg-J completely disrupts the interaction. CSNK2B function in regulating E-cadherin and β-catenin binding is subsequently disrupted. These results lead to a working hypothesis that aspects of the XFS phenotype involve LYST and CSNK2B pathways, likely influencing cell-cell adherens junctions. Epistasis experiments were used to test for genetic modifiers of Lyst, which demonstrated that albino Lyst mutant mice exhibited complete rescue of Lyst-dependent iris phenotypes. In a genetic background-driven approach, a DBA/2J strain of congenic mice was created. The DBA/2J background, which harbors multiple mutations influencing melanosomal-proteins, enhanced Lyst dependent iris phenotypes. Thus, both experimental approaches implicated melanosomes, a potential source of oxidative stress, as mechanistically contributory. Supporting a contributory role of oxidative damage, Lyst mutation resulted in genetic context sensitive changes in iris lipid hydroperoxide levels, being lowest in albino and highest in DBA/2J mice. These results identified an association between oxidative damage to lipid membranes and severity of Lyst-mediated phenotypes, uncovering a new mechanism contributing to pathophysiology involving LYST. In conclusion these results demonstrate that mutation of the Lyst gene can produce ocular features of human XFS and suggests that LYST or LYST-interacting genes may contribute to XFS.
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Zhao, Xinyan. "Exfoliation corrosion kinetics of high strength aluminum alloys." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1140154773.

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Books on the topic "Exfoliation"

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Peels and chemical exfoliation. 2nd ed. Clifton Park, NY: Cengage Learning, 2010.

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Khan, Raju, Neeraj Kumar, Mohd Abubakar Sadique, and Arpana Parihar, eds. Electrochemical Exfoliation of Graphene and Its Derivatives. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-2128-3.

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Environment, Great Britain Department of the. Secretary of State's guidance - exfoliation of vermiculite and expansion of perlite. London: H.M.S.O., 1991.

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Johnson, Ben. Transform your skin naturally: Groundbreaking alternatives to exfoliation and other damaging antiaging strategies. El Segundo, CA: Active Interest Media, 2010.

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Naib, Zuher M. Exfoliative cytopathology. 3rd ed. Boston: Little, Brown, 1985.

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Naib, Zuher M. Exfoliative cytopathology. 3rd ed. Boston: Little, Brown, 1985.

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1931-, Kline Tilde S., ed. Essentials of exfoliative cytology. New York: Igaku-Shoin, 1992.

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Lotti, Torello M., Uwe Wollina, Olga Olisova, and Mohammad Jafferany, eds. Clinical Cases in Exfoliative Dermatitis. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-08466-9.

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K, McClure Donald, ed. A handbook of exfoliative cytology. New York: Igaku-Shoin, 1985.

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Lotti, Torello M., Uwe Wollina, Olga Olisova, and Mohammad Jafferany, eds. Clinical Cases in Geriatric Exfoliative Dermatitis. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09436-1.

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Book chapters on the topic "Exfoliation"

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Bährle-Rapp, Marina. "Exfoliation." In Springer Lexikon Kosmetik und Körperpflege, 197. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_3832.

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Loktionov, Alexandre. "Exfoliation of Cells." In Encyclopedia of Cancer, 1–5. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-27841-9_2056-2.

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Loktionov, Alexandre. "Exfoliation of Cells." In Encyclopedia of Cancer, 1663–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-46875-3_2056.

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Loktionov, Alexandre. "Exfoliation of Cells." In Encyclopedia of Cancer, 1357–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16483-5_2056.

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Konstas, Anastasios G. P., Gábor Holló, and Robert Ritch. "Exfoliation Syndrome and Glaucoma." In The Glaucoma Book, 507–16. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-0-387-76700-0_39.

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Konstas, Anastasios-Georgios P., Gábor Holló, Miguel A. Teus, and Robert Ritch. "Exfoliation Syndrome and Glaucoma." In Clinical Glaucoma Care, 345–59. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-4172-4_17.

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Scherzer, B. M. U. "Bubbles, Blisters, and Exfoliation." In Erosion and Growth of Solids Stimulated by Atom and Ion Beams, 222–46. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4422-0_13.

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Liu, Jilei. "Electrochemical Exfoliation Synthesis of Graphene." In Graphene-based Composites for Electrochemical Energy Storage, 39–50. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3388-9_2.

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Jaiswal, Rimpa, Mantu Modak, and Sudeepa Devi. "Overview of Electrochemical Exfoliation Approaches." In Electrochemical Exfoliation of Graphene and Its Derivatives, 1–31. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-2128-3_1.

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Gopalakrishnan, Prakadeeswari, Aravind Haripriya, Banushree Ratukondla, and Periasamy Sundaresan. "Genetics of Exfoliation Syndrome in Asians." In Essentials in Ophthalmology, 381–91. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0884-0_31.

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Conference papers on the topic "Exfoliation"

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Xu, Chun, and Shuhui Li. "Correlation Between Strain and Exfoliating Performance of Galvannealed DP Steels." In ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21021.

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The galvannealed dual-phase steels are used in automotive applications. However, galvannealed coating is often exfoliated when it is in the pressing process. Galvannealed exfoliation is examined as a function of strain state using double reserve Olsen test to simulate forming process. Distances of punch in first and second reverse Olsen tests are changed to used to generate other strain state. The circle grids are etched on sheet to measure strain. Significant exfoliating is encountered in biaxial compress strain zone while no exfoliating occurred in biaxial tensile strain zone. Exfoliating is measured at specific locations and correlated with strains in those locations. An exfoliating map is generated in strain space.
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Watanabe, Yutaka, and Hiroaki Kikkawa. "Steam Oxidation of Creep-Strength Enhanced 9Cr Ferritic Steel: Void Formation in Oxide Scale and Its Relation to Scale Exfoliation." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2575.

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The purposes of this research are (1) evaluating the importance of voids existing in oxide scales to exfoliation of oxide scales formed in superheated steam, (2) discussing possible role of Cr-rich layer in void formation in the oxide scales. First, superheater tubes, which are made of 9Cr-1MoVNb ferritic steel and were experienced with scale exfoliation, were removed from a fossil power plant and oxidation interfaces of the boiler tubes were examined in terms of structure, void distribution, elemental profile of the oxide scales and exfoliation characteristics. Then, exfoliation behaviors of oxide scales were evaluated on actual superheater tubes and on the steam oxidation specimens experimentally oxidized in autoclaves by tensile tests in terms of exfoliation strength and of position of exfoliation and its relation with void distribution in the scales. The results indicated an important role of void formation and growth in exfoliation of scale exfoliation. Void formation mechanism was also discussed based on the observed characteristics of the oxide scales.
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Cherekdjian, S., J. G. Couillard, C. Wilcox, Jiro Matsuo, Masataka Kase, Takaaki Aoki, and Toshio Seki. "Hydrogen Implants for Layer Exfoliation." In ION IMPLANTATION TECHNOLOGY 2101: 18th International Conference on Ion Implantation Technology IIT 2010. AIP, 2011. http://dx.doi.org/10.1063/1.3548364.

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Tran, Nguyen, Michael Wilson, Adriyan Milev, Gary Dennis, G. S. Kamali Kannangara, and Robert Lamb. "Mechanism of Exfoliation of Clays." In SYNCHROTRON RADIATION INSTRUMENTATION: Ninth International Conference on Synchrotron Radiation Instrumentation. AIP, 2007. http://dx.doi.org/10.1063/1.2436382.

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Xu, Hong. "Effects of Oxygenated Treatment on Exfoliation of Duplex Scale in Steam Path." In ASME 2011 Power Conference collocated with JSME ICOPE 2011. ASMEDC, 2011. http://dx.doi.org/10.1115/power2011-55397.

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Oxygenated treatment (OT) is an excellent choice for supercritical (SC) and ultrasupercritical (USC) fossil units to alleviate flow accelerated corrosion (FAC). Unfortunately, many large utility boilers had suffered series bursts caused by exfoliation of duplex scale in steam path after adopting OT measures. It has been hopeful always about that OT should be independent of scale exfoliation, but many tube failures in fossil power plants go by contraries. Ecocide hypothesis which has been verified reveals the secret of the causal relationship between OT and exfoliation. Ecocide is the abbreviation of “Evaporating Consumption of Chromium Induced Disastrous Exfoliation” and that’s the essence of our hypothesis. We can explain the mechanism of exfoliation of duplex scale in oxygenated steam path with the help of ecocide hypothesis, and furthermore we can predict the risk of OT. Concerned with operating utility boilers which intend to apply OT, the longer the operating history, the greater the risk; the higher the concentration of oxygen in steam, the greater the risk; the higher the parameters of steam, the greater the risk. To avoid the risk of exfoliation, OT should be synchronously scheduled in commissioning.
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Diepart, Claude P., E. Roger Thompson, and James Harrison. "Exfoliation Corrosion Located by Search Peening." In Airframe Finishing, Maintenance & Repair Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1995. http://dx.doi.org/10.4271/951147.

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Srivastava, Pawan Kumar, Premlata Yadav, and Subhasis Ghosh. "Doping of graphene during chemical exfoliation." In SOLID STATE PHYSICS: PROCEEDINGS OF THE 57TH DAE SOLID STATE PHYSICS SYMPOSIUM 2012. AIP, 2013. http://dx.doi.org/10.1063/1.4791122.

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Sarver, J. M., and J. M. Tanzosh. "Effect of Temperature, Alloy Composition and Surface Treatment on the Steamside Oxidation / Oxide Exfoliation Behavior of Candidate A-USC Boiler Materials." In AM-EPRI 2013, edited by D. Gandy and J. Shingledecker. ASM International, 2013. http://dx.doi.org/10.31399/asm.cp.am-epri-2013p0765.

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Abstract As part of the Boiler Materials for Ultrasupercritical Coal Power Plants program, sponsored by the United States (U.S.) Department of Energy (DOE) and the Ohio Coal Development Office (OCDO), the steamside oxidation and oxide exfoliation behavior of candidate alloys have been thoroughly evaluated in steam at temperatures between 620°C and 800°C (1148°F and 1472°F) for times up to 10,000 hours. The results from this test program indicate that the oxidation rates and oxide morphologies associated with steamside oxidation are a strong function of the crystallographic lattice structure and the chromium content of the material. Oxide exfoliation correlates to oxide thickness. The time required to reach the critical oxide thickness for exfoliation can be estimated based on oxidation kinetic relationships. For austenitic stainless steels, shot peening is effective in reducing steamside oxidation/exfoliation, but the efficacy of this technique is limited by the operating temperature. Nickel-based alloys exhibit very low oxidation/exfoliation rates, but have a propensity to form aluminum/titanium oxides along near surface grain boundaries.
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Song, Chunfang, Weiwei Lin, Qi Wang, and Yiping Qiu. "Effect of Curing Process on Intercalation and Exfoliation Behavior of Epoxy/Clay Nanocomposites." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39483.

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Effects of curing agents, curing conditions, and curing degree on intercalation and exfoliation behavior of epoxy/clay nanocomposites were investigated. Epoxy was cured with five curing agents, DETA, DDM, DMP-30 and two modified amines, with different curing speeds at various temperatures (from low to high). Curing degree and distance between layers of clay were measured by FTIR, XRD and TEM respectively. It was found that it was easy to intercalate clay in epoxy resin, while clay exfoliation in epoxy resin was dependent more on the curing conditions than on curing agents. Under certain curing conditions when curing speed of interlayer epoxy resin is faster than that of extralayer and fully reaches curing, exfoliation easily takes place with all these curing agents and epoxy/clay nanocomposites can be prepared. At the same time, the distance between clay layers increased from 17.5Å to about 100Å. When the curing temperature was too low, diffusion speed of the epoxy resin and the curing agents can influence the clay exfoliation. When the curing temperature was too high, epoxy was cured too rapidly, such that the high viscosity and the resultant mechanical forces will stop the exfoliation process. Only under properly temperatures when the curing speed of the interlayer epoxy is higher than that of the extralayer epoxy can exfoliation take place.
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Yang, Guang, Haixu Wang, Ning Wang, Rong Sun, and Ching-Ping Wong. "Hydrothermal Exfoliation for Two-Dimension Boron Nitride Nanosheets." In 2018 IEEE 68th Electronic Components and Technology Conference (ECTC). IEEE, 2018. http://dx.doi.org/10.1109/ectc.2018.00217.

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Reports on the topic "Exfoliation"

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Padmanabhan, Prashant, Kevin Kwock, Finn Buessen, Roxanne Tutchton, Samuel Gilinsky, Min Lee, Srinivasa Rao, et al. The transient properties of 2D magnets: from mechanical exfoliation to ultrafast optical spectroscopy of CrX3 materials. Office of Scientific and Technical Information (OSTI), September 2020. http://dx.doi.org/10.2172/1669071.

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Author, Not Given. High efficiency (> 20%) heterojunction solar cell on 30μm thin crystalline Si substrates using a novel exfoliation technology. Office of Scientific and Technical Information (OSTI), December 2012. http://dx.doi.org/10.2172/1356325.

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Bahat, D., K. Grossenbacher, and K. Karasaki. Investigation of exfoliation joints in Navajo sandstone at the Zion National Park and in granite at the Yosemite National Park by tectonofractographic techniques. Office of Scientific and Technical Information (OSTI), April 1995. http://dx.doi.org/10.2172/70735.

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