A5073633670- High-Temperature Coating Behaviors
- Metal and Thin Film Mechanics
- Advanced materials and composites
- Metal Alloys Wear and Properties
- High Entropy Alloys Studies
- Advanced ceramic materials synthesis
- Surface Treatment and Coatings
- Tribology and Wear Analysis
- Material Properties and Applications
- Magnesium Oxide Properties and Applications
- Electrodeposition and Electroless Coatings
- Diamond and Carbon-based Materials Research
- Technical Engine Diagnostics and Monitoring
- Intermetallics and Advanced Alloy Properties
- Catalytic Processes in Materials Science
National Interuniversity Consortium of Materials Science and Technology
2015-2024
Sapienza University of Rome
2014-2024
University West
2020-2021
Tecnologia Energia Ambiente Materiali (Italy)
2013
In this study, effect of feedstock particle size and nozzle configuration on deposition, microstructural features, hardness sliding wear behaviour high velocity air fuel (HVAF)-sprayed WC-CoCr coatings was evaluated. Three different powders with nominal sizes 5/20 μm (fine), 5/30 (medium) 15/45 (coarse) were sprayed employing a HVAF gun four distinct DeLaval configurations involving lengths and/or exit diameters. Microstructure, phase constitution mechanical characteristics the evaluated...
Deployment of a suspension feedstock has been known to alleviate problems associated with using sub-micron and nanosized powder for thermal spraying monolithic as well powder-suspension 'hybrid' composite coatings. However, hybrid never previously used in high-velocity air-fuel (HVAF) spraying. In this work, the very first time, chromium carbide (Cr3C2) co-sprayed along an Inconel-625 (IN-625) by HVAF process illustrative case study. Two variants IN-625 + Cr3C2 coatings were produced varying...
Several contents of silicon in AlSi coatings, and substrate nature, were investigated this present research. For purpose, thin films deposited by Physical Vapour Deposition onto three substrates: The effect content on the microstructure mechanical properties coatings was studied. microstructural observations showed that coating carried out with 7 wt-%. reduced porosities making microstructures more homogeneous denser. Also, influence characteristics evolution distribution formed during is...
<div>In this study, we have investigated the microstructural characteristics, mechanical properties, and dry sliding wear behavior of a ceramic coating consisting zirconia (ZrO<sub>2</sub>) alumina (Al<sub>2</sub>O<sub>3</sub>) deposited by flame spraying. A series tests were carried out under variety loads at two different speeds. The evaluation included an examination microstructure, microhardness, coefficient friction (COF), resistance...
Different techniques are usually employed to evaluate the mechanical properties of arc-sprayed coatings. In many situations, comparing is complex, and values extracted from tensile tests required for structural projects. X6CrNi18-8 stainless steel molybdenum were sprayed onto a mild substrate using electric arc thermal spray technique discuss this issue. After detailed microstructure characterization, performed on both coatings determine yield strength total elongation. Easy also applied:...
Hot corrosion affects the components of diesel engines and gas turbines working at high temperatures, in presence low-melting salts oxides, such as sodium sulfate vanadium oxide. Thermal-sprayed coatings nickel–chromium-based alloys reinforced with ceramic phases, can improve hot erosion resistance exposed metals, a sealing thermal, post-treatment prove effective reducing permeability aggressive species. In this study, effect purposely-optimized high-power diode laser reprocessing on...
Nanostructured Al2O3-TiO2 wear resistant coatings were produced by air plasma spray from plasma-densified agglomerated nano-powders. Conventional also deposited for direct comparison of tribological performance. Operating parameters optimized a DOE (Design Experiment) procedure, to produce coherent and well adherent ceramic minimize dwell times in the torch order reduce risk excessive grain growth or complete remelting. Optimal behaviour was selected as main goal function. Microstructural...
Abstract Wear-resistant cobalt–based alloy (Stellite 12) coatings deposited by plasma transferred arc (PTA), commonly used to protect critical mechanical components in harsh environments, were modified addition of hard ceramic particles (TiC) and solid lubricant compounds (MoS2 CaF2) improve the overall tribological performance. In this preliminary study, microstructural, microhardness analyses carried out assess: a) feasibility PTA deposition thermally sensitive phases characterised very...