Thematische Bibliographien / Pull-off adhesion testing

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Auswahl der wissenschaftlichen Literatur zum Thema „Pull-off adhesion testing“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Pull-off adhesion testing"

Cleland, D. J., und L. Basheer. „Pull-off adhesion testing for concrete repairs“. Magazine of Concrete Research 59, Nr. 10 (Dezember 2007): 771–76. http://dx.doi.org/10.1680/macr.2007.59.10.771.

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Dilik, Tuncer, Seda Erdinler, Ender Hazır, Hüseyin Koç und Salim Hiziroglu. „Adhesion Strength of Wood Based Composites Coated with Cellulosic and Polyurethane Paints“. Advances in Materials Science and Engineering 2015 (2015): 1–5. http://dx.doi.org/10.1155/2015/745675.

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The objective of this study was to determine adhesive strength of particleboard and medium density fiberboard (MDF) finished with two types of paints. Samples were coated using cellulosic and polyurethane based paints. Adhesion strength and coating layer thickness of each sample were measured using pull-off testing method and PosiTector equipment, respectively. The highest adhesion strength value of 3.62 MPa was found for MDF samples coated with paint. Based on the statistical analysis type of substrate significantly influenced overall adhesion strength of the samples while type and layer thickness of paint as well as number of layers applied to the surface of specimens have not affected significantly adhesion resistance of the panels used in this work. It appears that pull-off test can effectively be used to determine and evaluate adhesion strength of the samples considered in the experiments.

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Gustke, Kevin, Jana Gebauer, Rico Drehmann, Andrés Fabián Lasagni und Thomas Lampke. „Enhancement of the Adhesion of Wire Arc Sprayed Coatings on Carbon Fiber-Reinforced Plastic by Surface Laser Structuring“. Coatings 11, Nr. 4 (16.04.2021): 467. http://dx.doi.org/10.3390/coatings11040467.

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Due to their outstanding stiffness-to-weight ratio, fiber-reinforced plastics are established materials for weight reduction in the aerospace and automotive industries. To improve certain properties, such as their low thermal and electrical conductivity, metallic coatings can be applied to the polymer surface. One of the methods used for this purpose is thermal spraying. Studies have shown that the adhesion strength of metallic coatings on polymer surfaces is low. To improve the adhesion strength, the surface of the fiber-reinforced plastics was pretreated with pulsed laser-based methods. This study describes in detail the process chain, the resulting surface conditions and their effect on the adhesion strength of wire arc sprayed copper coatings in pull-off and shear tensile testing. The results show up to ~200% increase in adhesion strength for the laser-structured samples compared to the grit-blasted reference samples in the pull-off test.

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Gorumlu, Serdar, und Burak Aksak. „Sticking to rough surfaces using functionally graded bio-inspired microfibres“. Royal Society Open Science 4, Nr. 6 (Juni 2017): 161105. http://dx.doi.org/10.1098/rsos.161105.

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Synthetic fibrillar adhesives inspired by nature, most commonly by the gecko lizard, have been shown to strongly and repeatedly attach to smooth surfaces. These adhesives, mostly of monolithic construction, perform on par with their natural analogues on smooth surfaces but exhibit far inferior adhesive performance on rough surfaces. In this paper, we report on the adhesive performance of functionally graded microfibrillar adhesives based on a microfibre with a divergent end and a thin soft distal layer on rough surfaces. Monolithic and functionally graded fibre arrays were fabricated from polyurethanes and their adhesive performance on surfaces of varying roughness were quantified from force–distance data obtained using a custom adhesion measurement system. Average pull-off stress declined significantly with increasing roughness for the monolithic fibre array, dropping from 77 kPa on the smoothest (54 nm RMS roughness) to 19 kPa on the roughest (408 nm RMS roughness) testing surface. In comparison, pull-off stresses of 81 kPa and 63 kPa were obtained on the same respective smooth and rough surfaces with a functionally graded fibre array, which represents a more than threefold increase in adhesion to the roughest adhering surface. These results show that functionally graded fibrillar adhesives perform similar on all the testing surfaces unlike monolithic arrays and show potential as repeatable and reusable rough surface adhesives.

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Szymanowski, Jacek, und Łukasz Sadowski. „Adhesion Assessment between Concrete Layers Using the Ultrasonic Pulse Velocity Method“. Applied Mechanics and Materials 797 (November 2015): 145–50. http://dx.doi.org/10.4028/www.scientific.net/amm.797.145.

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Adhesion assessment between concrete layers with the use of the non-destructive ultrasonic pulse velocity (UPV) method has been described in the article. Two-layer concrete elements, obtained by drilling the core from a large size multilayer element, were the object of testing. The ultrasonic wave velocity of the element and the materials of which its layers were made were assigned for each element. On that basis, the comparative velocity i.e. the velocity at which an ultrasonic wave going through the boundary surface of layers wouldn’t cause any change in the velocity, was determined. The ratio of the two velocities has been compared to adhesion values obtained through the semi-destructive pull-off method. It was revealed that when the ratio of the ultrasonic wave velocity of the element to comparative velocity increases, the pull-off adhesion value also increases.

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Kolegar, Tomas, Martin Matousek, Monika Vilemova und Vladimir Stary. „ADHESION OF BIOCOMPATIBLE TiNb COATING“. Acta Polytechnica CTU Proceedings 8 (30.06.2017): 5–7. http://dx.doi.org/10.14311/app.2017.8.0005.

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Preparation of a coating with a high quality requires good adhesion of the film to the substrate. The paper deals with the adhesion of biocompatible TiNb coating with different base materials. Several materials such as titanium CP grade 2, titanium alloys Ti6Al4V and stainless steel AISI 316L were measured. Testing samples were made in the shape of small discs. Those samples were coated with a TiNb layer by using the PVD method (magnetron sputtering). Onto the measured layer of TiNb an assistant cylinder was stuck using a high strength epoxy adhesive E1100S. The sample with the assistant cylinder was fixed into a special fixture and the whole assembly underwent pull-off testing for adhesion. The main result of this experiment was determining the strength needed to peel the layer and morphology and size of the breakaway. As a result, we will be able to determine the best base material and conditions where the coating will be remain intact with the base material.

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Ullah, Sana, Ronald Weilguny, Sorschag Kurt und Gunter Zieger. „Optimizing Combination of Parameters for Pull-off Adhesion Testing through Design of Experiment Study“. Journal of Nano- and Electronic Physics 10, Nr. 4 (2018): 04007–1. http://dx.doi.org/10.21272/jnep.10(4).04007.

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Heepe, Lars, Alexander E. Kovalev und Stanislav N. Gorb. „Direct observation of microcavitation in underwater adhesion of mushroom-shaped adhesive microstructure“. Beilstein Journal of Nanotechnology 5 (25.06.2014): 903–9. http://dx.doi.org/10.3762/bjnano.5.103.

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In this work we report on experiments aimed at testing the cavitation hypothesis [Varenberg, M.; Gorb, S. J. R. Soc., Interface 2008, 5, 383–385] proposed to explain the strong underwater adhesion of mushroom-shaped adhesive microstructures (MSAMSs). For this purpose, we measured the pull-off forces of individual MSAMSs by detaching them from a glass substrate under different wetting conditions and simultaneously video recording the detachment behavior at very high temporal resolution (54,000–100,000 fps). Although microcavitation was observed during the detachment of individual MSAMSs, which was a consequence of water inclusions present at the glass–MSAMS contact interface subjected to negative pressure (tension), the pull-off forces were consistently lower, around 50%, of those measured under ambient conditions. This result supports the assumption that the recently observed strong underwater adhesion of MSAMS is due to an air layer between individual MSAMSs [Kizilkan, E.; Heepe, L.; Gorb, S. N. Underwater adhesion of mushroom-shaped adhesive microstructure: An air-entrapment effect. In Biological and biomimetic adhesives: Challenges and opportunities; Santos, R.; Aldred, N.; Gorb, S. N.; Flammang, P., Eds.; The Royal Society of Chemistry: Cambridge, U.K., 2013; pp 65–71] rather than by cavitation. These results obtained due to the high-speed visualisation of the contact behavior at nanoscale-confined interfaces allow for a microscopic understanding of the underwater adhesion of MSAMSs and may aid in further development of artificial adhesive microstructures for applications in predominantly liquid environments.

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Goth, Christian, Thomas Kuhn, Gerald Gion und Jörg Franke. „Hot Pin Pull Method – New Test Procedure for the Adhesion Measurement for 3D-MID“. Advanced Materials Research 1038 (September 2014): 115–20. http://dx.doi.org/10.4028/www.scientific.net/amr.1038.115.

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The adhesion test of metallic structures on MID (Molded Interconnect Devices) parts is an unsolved issue. So far no method really works reliably. The test methods which are conventionally used are the pull-off test and the shear-test. Both show large standard deviation and the reproducibility is not assured. Nordson DAGE has introduced the new micro-material testing system 4000Plus. This device enables a new test method for the determination of the adhesion strength of MID structures using the hot pin pull (hot bump pull) method. Copper pins (tinned or untinned) are heated up with a user defined temperature profile, soldered to a metallized structure on the MID and then removed vertically upward, while the force is recorded. In this contribution investigations with this new test method are presented.

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Lachance-Tremblay, Éric, Michel Vaillancourt, Daniel Perraton und Hervé Di Benedetto. „Comparison of the moisture damage of bituminous binder coupled with glass and limestone substrate using pull-off test“. Canadian Journal of Civil Engineering 46, Nr. 3 (März 2019): 188–94. http://dx.doi.org/10.1139/cjce-2018-0152.

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In this paper, the moisture susceptibility of different bituminous binders with two substrates (glass and limestone) was investigated. To that end, the tensile strength of different combinations of bituminous binder–substrate bond was measured using a pull-off test. This test was adapted from the pneumatic adhesion tensile testing instrument (PATTI) test to improve repeatability. Samples were tested in dry condition and after a 7-day conditioning in hot water bath (60 °C). An analysis of variance (ANOVA) was performed on the test results. Overall, the results show that in dry condition, the pull-off strength is a function of the bituminous binder type rather than of the substrate type. After water conditioning, an increase in the pull-off strength was observed for the bituminous binder without polymers and coupled with glass substrate. This was associated with an increase in binder stiffness. For the limestone substrate, the effect of water conditioning was significant only for one type of binder.

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Dissertationen zum Thema "Pull-off adhesion testing"

Běloch, Martin. „Optimalizace předúpravy povrchu oceli a hliníkové slitiny pro následnou aplikaci práškové barvy“. Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-444543.

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This diploma thesis deals with various procedures of surface pretreatment of steel and aluminum alloy for subsequent application of powder coating substance. The work begins with an overview of the general characteristics of the materials used. The core part of the work is then a summary of the individual methods of pretreatment that can be used to modify the material surface. A special chapter is devoted to methodologies for the application of powder substances. Before separate application, the sample must first be carefully pretreated to ensure removal of organic compounds (e.g. oils from primary processing - grinding, cutting), or dust impurities to ensure the correct barrier effect. After dividing the individual methods of surface preparation, a powder paint system with a total thickness of approximately 50 µm is applied to the test material. Samples with different surface pretreatments will be compared both in terms of mechanical properties and in terms of electrochemical properties.

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Buchteile zum Thema "Pull-off adhesion testing"

Liao, Chu-Tsen, und Po-Juin Wu. „A Study on the Vertical Pull-off Testing and Horizontal Shear Testing Strength of External Wall Tile Adhesion“. In Lecture Notes in Civil Engineering, 1001–10. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8079-6_94.

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Konferenzberichte zum Thema "Pull-off adhesion testing"

Han, Jeahyeong, Daniel Joe, Rich I. Masel und Mark A. Shannon. „AFM Verification of CFn Surface Treatment Effect and Its Correlation to Stiction Reduction in Microvalves“. In ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/detc2008-49842.

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The purpose of this paper is to show AFM verification of adhesion reduction between valve seat/membrane interfaces by surface coatings from a C4F8/Ar plasma in an ICP DRIE. Our check valves utilize a polyimide (PI, Polyimide 5878G, HD Microsystem) membrane on a Si/SiO2 valve seat. These valves form a seal between a polished Si/SiO2 substrate and a smooth polymer membrane. PI absorbs moisture up to 3.4% wt per volume, and the SiO2 surface also has an affinity to water. The smooth PI membrane touches the SiO2 surface, giving rise to relatively strong van der Waals adhesion. Under humid conditions, hydrogen-bonded stiction can occur at the interface between the PI and SiO2 during the drying step. The C4F8/Ar plasma coating is utilized for the actual device in order to lower the interface adhesion between Si/SiO2 and PI film. The opening pressures of devices with/without CFn film are measured. The valves without non-stiction coating did not open with inlet pressures up to 210 KPa. With a non-stiction coating, the valves showed an initial opening pressure of 32.5±11 KPa. AFM pull-off measurements using nano-sized tips and micro sized tips are performed to quantify the effect of the CFn film-treated surface between solid-solid surface pairs. The original surface pair for the microvalve membrane and seat surface is Si/SiO2 and PI film. The CFn film treatment is possible on one or both sides of the surfaces. AFM pull-off testing has been performed to measure the work of adhesion between four possible surface combinations, including SiO2/PI, CFn/PI, CFn/SiO2, and CFn/CFn. The work of adhesion of the surface pairs is obtained using the Johnson-Kendall-Roberts (JKR) theory. Two types of AFM probes were used, a regular nano-sized AFM probe and a one micron particle AFM probe. The work of adhesions obtained for the pairs above are 257.6±37.1, 59.4±29.2, 89.6±18.2, and 41.0±8.2 [mJ/m2] from regular tips, and 159.48±4.0, 41.9±2.0, 65.7±12.2, and 37.4±3.7 [mJ/m2] from the particle tips. The CFn film treatment reduced the adhesion energy up to 84% for the regular AFM tip results, and up to 76.7% from the particle AFM tip results. The static contact angle of CFn film with respect to de-ionized water is 116.4 ± 0.9°. The surface coatings from a C4F8/Ar plasma in an ICP DRIE can reduce the contact adhesion forces and capillary forces during the fabrication process preventing stiction.

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TabkhPaz, Majid, Dong-Yeob Park und Simon Park. „Investigation of Zinc- and Carbon-Nanoparticle-Based Nanocomposite Coatings“. In 2016 11th International Pipeline Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ipc2016-64132.

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High performance coatings of pipelines should possess properties such as high adhesion to the substrate, low gas permeability, high corrosion resistance, etc. In this study, novel nanocomposite materials are studied for coating of steel plates. The coatings consist of two-layer composites with different nanoparticulates. Zinc particles, multi-walled carbon nanotubes (MWCNT), and graphene nanoplatelets (GNP) are used for the base layer bonded to the steel. Zinc particles are used as a filler and act as sacrificial anode against corrosion (cathodic protection). Hexagonal boron nitride (hBN) is added to the matrix for the second layers. Adhesion of the coatings is studied through pull-off tests. To examine the corrosion protection capabilities, cathodic disbondment tests are conducted on the coated steel plates. The gas permeability of the coatings is evaluated through a standard testing technique. Results show that addition of Zinc particulates could enhance corrosion protection. The addition of GNP and hBN nanoparticulates resulted in lower gas penetration. Results of this research will contribute to the development of advanced pipeline coatings.

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