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Showing 1 to 20 of 91 for “"PTFE"”.
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Development and analysis of aluminum-PTFE reactive composite material
… even explosives. A composite with composition Al-PTFE (90-10 wt. %) is prepared through Cryomilling and is shown to be a better method of preparation as compared to room temperature milling. The prepared materials are studied to identify best conditions. The analysis methods include thermal …
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Friction, wear and mechanical properties of electron beam modified PTFE-based rubber compounds
… Die Verwendung von mit Elektronen modifizierten PTFE-Pulvern in Ethylen-Propylen-Dien-Monomer (EPDM) Kautschuken führt zu einer signifikanten Reduzierung der Reibung, Erhöhung der Verschleißfestigkeit und gleichzeitig zu verbesserten mechanischen Eigenschaften in Folge einer speziellen chemischen …
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The tribological behaviour of glass filled polytetrafluoroethylene(PTFE) under dry and water lubrication
… % wt glass fibre filled polytetrafluoroethylene (PTFE) under dry sliding conditions. The experimental work was extended to compare and include its wear behaviour with other fillers such as bronze, carbon and graphite and to conduct tests under under water lubrication. Polyester-based materials, …
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Development and Evaluation of NI-P-PTFE Based Nano-Composite Coatings for Medical Devices
… this study, two kinds of Ni-P-PTFE based coatings including Ni-P-PTFE-ZrO2 and Ni-P-PTFE-ZrO2-TiO2 were developed by electroless plating technique. The assays of bacterial adhesion and removal were conducted on nano-composite Ni-P-PTFE-ZrO2 and Ni-P-PTFE-ZrO2-TiO2 coatings to …
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Avaliação tribológica de compósitos de PTFE e rejeito de scheelita aplicáveis a mancais secos
… tribologically, a scheelite tailings- filled PTFE composites to dry rubbing journal bearings application, to reduce cost and extend life service of this parts. The tailing of scheelite, obtained from scheelite mining to produce tungsten, is a mineral spoilage composed of oxides, as a silicon …
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Friction and Wear of Polytetrafluoroethylene/Graphene Oxide Composite Thin Films
<p>Polytetrafluoroethylene (PTFE) is a commonly used solid lubricant due to its low coefficient of friction and chemical inertness. As a polymer, PTFE suffers from high wear and low adhesion to substrates limiting its use as a thin film. Thin PTFE films are ideal candidates for solid lubrication in …
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Assessing differential scanning calorimetry as a retrospective dosimetry method for the verification of uranium enrichment activities
… application, based on polytetrafluoroethylene (PTFE) and the thermal analysis techniques differential scanning calorimetry (DSC) and fast scanning calorimetry (FSC). The DSC-PTFE system shows statistically significant sensitivity in the dose ranges expected. The FSC-PTFE system demonstrates …
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Construction of an Initiated Chemical Vapor Deposition (iCVD) Reactor and Deposition of Polytetrafluoroethylene (Ptfe) Thin Films Using Perfluoro-1-Octanesulfonyl Fluoride as the Initiator
… and use it to grow polytetrafluoroethylene (PTFE) thin films. Perfluoro-1-octanesulfonyl fluoride (PFOSF) was used as the initiator while hexafluoropropylene oxide (HFPO) was used as the monomer. HPFO is well known for its good thermal decomposition. Nichrome filaments were resistively heated …
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Elevated-Temperature Oxidative Curing, Friction and Wear of Polyphenylene Sulfide (PPS) and its Composites
… and the role of conventional fillers like PTFE, graphite, and carbon fiber on its performance. In this study, thermal colorimetry was used to describe the influence of processing parameters on PPS morphology due to its oxidative curing reaction. Then a set of PPS composites with different …
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Evaluation of the Effect of Microporous Sublayer Design and Fabrication on Performance and Adhesion in PEM Fuel Cell Assemblies
… of carbon black and polytetrafluoroethylene (PTFE), which is typically applied to the gas diffusion layer (GDL). The composition (wt.% PTFE) and loading (mg/cm2) can be varied to optimize the electrochemical performance of the PEMFC and the overall adhesion of the layers within the PEMFC. This …
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Interaction between membrane and protein properties on flux decline during sterile microfiltration
… using uncoated polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF) membranes, and PTFE and PVDF membranes coated with polyvinyl alcohol (PVA). Feed streams consisted of lysozyme, β-lactoglobulin and ovalbumin. The pH values of the solution were set at the isoelectric point …
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Tribology of polymeric coatings for aggressive bearing applications
… performance, polytetrafluoroethylene (PTFE)- and polyetheretherketone (PEEK)-based polymeric coatings have received interest in ACR compressor applications, as a potential solution to supplement and potentially replace conventional oil lubricants. However, compared to a great amount of …
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Characterization of a green electric solid propellant for electric propulsion
… thruster propellant, polytetrafluoroethylene or PTFE. Impulse bit measurements for PTFE indicate 100 μN-s at an initial energy level of 5 J, which increases linearly by ~30 μN-s/J with initial energy. Measurements of the impulse bit for the electric solid propellant are on average lower than PTFE …
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Cesium hydrogen sulphate and cesium dihydrogen phosphate based solid composite electrolyte for fuel cell application
… proton conducting material in composition with PTFE and SiO2 to enhance the solid electrolyte composites mechanical strength and conductivity. Conductivity measurements for CsHSO4 and CsH2PO4 and composites thereof, in temperature ranges 0 to 180 oC and 0 to 250 oC respectively, were carried …
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Der femoropopliteale P1-Bypass mittels Fluoropassiv - Erfahrungen mit einem neuen alloplastischen Gefäßersatz
… Polyesterprothese (Fluoropassiv™) und von PTFE-Standardprothesen zur supragenualen Gefäßrekonstruktion bei peripherer arterieller Verschlusskrankheit. Methoden: Von August 1996 bis Januar 1997 wurden bei 37 Patienten 21 Fluoropassiv- und 20 PTFE-Prothesen implantiert, die …
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Development of novel nano-coating applied on metal stencils used in the manufacture of printed circuit boards and similar products
… was explored, with Al2O3, SiC, ZrO2 and PTFE as reinforcing nanocomposites. The optimized physical parameters obtained earlier were utilized with reinforcing nanocomposites varied. The grain size was seen to decrease further with the addition of reinforcing nanocomposite. The change in …
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Tribology of engineering and coated materials in the presence of environmentally friendly refrigerant
… (ATSP), blended with 5% polytetrafluoroethylene (PTFE), namely ATSP/PTFE, has been evaluated under unlubricated and boundary lubricated conditions. Current state-of-art polymeric coatings have also been considered for comparative purposes. Tribological and morphological investigations revealed …
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