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Добірка наукової літератури з теми "HVOF SPRAYED"

Автор: Grafiati

Опубліковано: 11 вересня 2023

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Дисертації з теми "HVOF SPRAYED"

1

Mercier, Dominic. "Oxidation behavior of nanostructured CoNiCrAlY and NiCoCrAlY sprayed by HVOF." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=86775.

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Анотація:

In recent years, much development has been made in the world of nanotechnologies. Hence, nanomaterials, which possess unique characteristics and excellent mechanical properties, are now being used in innovative and advanced applications. Despite the incredible potential of nanomaterials, their use is still at an embryonic stage as a result of the difficulty to mass-produce them. Among the potentially viable application remains the fabrication of nanostructured powders to produce high temperature oxidation resistance coatings.<br>Nanostructured coatings were obtained by thermally spraying cr

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2

Abdollah, Sabrina. "Evaluating properties of corrosion resistance in thermal-sprayed (HVOF) coatings." Thesis, University of Manchester, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.490179.

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Анотація:

Thermal sprayed coatings had increased interest in surface engineering for applications in aggressive aqueous corrosive environments. With the advent of the high-velocity oxy-fuel (HVOF) spray process, thermal-sprayed coatings have gained popularity and are being studied extensively for their corrosion-resistant properties. It is a technique for enhancing the components and aircraft landing gear systems. The main aim of this research project is to improve the anti-corrosion (barrier) properties of hard thermal-sprayed coatings. X The coatings provided by the research project's partner, Greenhe

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3

Jones, Mark. "Properties of HVOF sprayed TiC and TiB2-based cermet coatings." Thesis, University of Nottingham, 2002. http://eprints.nottingham.ac.uk/12353/.

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Анотація:

This work reports research concerning the properties of cermet coatings deposited by high velocity oxy-fuel spraying, which are designed to exhibit resistance to abrasive wear and high-temperature oxidation. Cermet powders have been produced by self-propagating high-temperature synthesis (SHS) reaction of elemental powder mixtures of Fe, Cr, Ti and C or B, to produce a cermet, containing an Fe(Cr) binder phase and a hard ceramic phase, TiC or TiB2. The Ti and C content in the powder mixtures were varied in order to evaluate the effect of the C: Ti ratio of TiC on the overall integrity of three

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4

Nahvi, Saied Mehran. "Abrasive wear behaviour of steels and advanced HVOF-sprayed WC-M coatings." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/12118/.

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Анотація:

This thesis concerns a study of the three-body abrasive wear behaviour of two groups of materials with different abrasive particles using the Dry Sand Rubber Wheel (DSRW) test method. This investigation can be divided into three sections: In the first section, the abrasion of a range of steels with an ash from a biomass power station was compared with that observed for abrasion with a conventional silica abrasive. It was seen that the wear rate of the steels when abraded with silica increased in proportion to the applied load and decreased with the hardness of the steel. However, the bottom-as

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5

Wirojanupatump, Sittichai. "Characterisation and wear performance of HVOF sprayed Cr-xC-y-NiCr coatings." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311718.

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6

Shrestha, Suman Kumar. "Corrosion and erosion-corrosion of High Velocity Oxy-Fuel (HVOF) sprayed NiCrSiB coatings." Thesis, University of Glasgow, 2000. http://theses.gla.ac.uk/2866/.

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7

Saeidi, Saman. "Microstructure, oxidation & mechanical properties of as-sprayed and annealed HVOF & VPS CoNiCrAIY coatings." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/11731/.

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Анотація:

Three HVOF and a VPS CoNiCrAlY coating were sprayed using Praxair CO-210-24 and Sulzer Metco Amdry 9951 powders. All coatings were subject to vacuum annealing treatments at different temperatures for different exposure times in order to achieve equilibrium microstructures in all test samples. Both HVOF and VPS, as sprayed and heat treated coatings were oxidised at 850°C and 1100°C for periods of up to 250 hours. Scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), X-ray diffraction (XRD) and laser diffraction powder size analyses w

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8

Kutschmann, Pia, Thomas Lindner, Kristian Börner, Ulrich Reese, and Thomas Lampke. "Effect of Adjusted Gas Nitriding Parameters on Microstructure and Wear Resistance of HVOF-Sprayed AISI 316L Coatings." MDPI AG, 2019. https://monarch.qucosa.de/id/qucosa%3A34775.

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Анотація:

Gas nitriding is known as a convenient process to improve the wear resistance of steel components. A precipitation-free hardening by low-temperature processes is established to retain the good corrosion resistance of stainless steel. In cases of thermal spray coatings, the interstitial solvation is achieved without an additional surface activation step. The open porosity permits the penetration of the donator media and leads to a structural diffusion. An inhomogeneous diffusion enrichment occurs at the single spray particle edges within the coating’s microstructure. A decreasing diffusion dept

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9

Elo, Robin. "Evaluation of HVAF sprayed STR coatings." Thesis, Uppsala universitet, Tillämpad materialvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-176954.

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Анотація:

The Seamless Stressometer® roll (Seamless STR) is used to measure the flatness of aluminum and steel strip when there is an extreme demand on the surface finish. To protect the roll and strip, the roll is coated with two layers deposited by high velocity oxygen fueled spraying (HVOF), Cr-Ni(Si,B) closest to the roll and WC-Co on top. This solution has several disadvantages; high cost and complicated logistics, corrosion sensitivity and high residual stresses creates the need for two coatings which in turn complicates the process. Cobalt is, in addition, sensitive to low pH coolants and environ

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10

Sadeghimeresht, Esmaeil. "Corrosion Behavior of HVAF-Sprayed Bi-Layer Coatings." Licentiate thesis, Högskolan Väst, Avdelningen för avverkande och additativa tillverkningsprocesser (AAT), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-9929.

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Анотація:

In a variety of engineering applications, components are subjected to corrosive environment. Protective coatings are essential to improve the functional performances and/or extend the lifetime of the components. Thermal sprayingas a cost-effective coating deposition technique offers high flexibility in coatings' chemistry/morphology/microstructure design. However, the inherent pores formed during spraying limit the use of coatings for corrosion protection. The recently developed supersonic spray method, High-Velocity-Air-Fuel (HVAF), brings significant advantages in terms of cost and coating p

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