All Outputs (81)

Influence of KCl and HCl on high temperature corrosion of HVAF-sprayed NiCrAlY and NiCrMo coatings (2018)
Journal Article

The oxidation performance of NiCrAlY and NiCrMo coatings thermally sprayed by high velocity air-fuel (HVAF) technique has been investigated in a chloridizing-oxidizing environment, with and without a KCl deposit, at 600 °C for up to 168 h. Both coati... Read More about Influence of KCl and HCl on high temperature corrosion of HVAF-sprayed NiCrAlY and NiCrMo coatings.

Experimental and thermodynamic investigations on the chlorine-induced corrosion of HVOF thermal sprayed NiAl coatings and 304 stainless steels at 700 °C (2018)
Journal Article

Alumina-forming β-NiAl coatings were deposited by high Velocity Oxy-fuel (HVOF) thermal spray onto 304 stainless steels for protection against chlorine induced corrosion in a biomass-fired boiler. The corrosion test was conducted in a synthetic gas c... Read More about Experimental and thermodynamic investigations on the chlorine-induced corrosion of HVOF thermal sprayed NiAl coatings and 304 stainless steels at 700 °C.

Microstructure and wear behaviour of powder and suspension hybrid Al2O3–YSZ coatings (2018)
Journal Article

Suspension based plasma sprayed coatings can yield superior microstructural and tribological properties compared to conventional powder based plasma sprayed coatings. This study investigates a new hybrid method, using simultaneous spraying from powde... Read More about Microstructure and wear behaviour of powder and suspension hybrid Al2O3–YSZ coatings.

Chlorine-induced high temperature corrosion of HVAF-sprayed Ni-based alumina and chromia forming coatings (2017)
Journal Article

Chlorine-induced corrosion of HVAF-sprayed Ni21Cr and Ni5Al coatings was investigated in 5 vol.% O2 + 500vppm HCl + N2 with and without KCl at 600 °C up to 168 h. Both coatings were protective in the absence of KCl. With KCl, Ni21Cr degraded through... Read More about Chlorine-induced high temperature corrosion of HVAF-sprayed Ni-based alumina and chromia forming coatings.

Effect of particle and carbide grain sizes on a HVOAF WC-Co-Cr coating for the future application on internal surfaces: microstructure and wear (2017)
Journal Article

The use of nanoscale WC grain or finer feedstock particles are possible methods of improving the performance of WC-Co-Cr coatings. Finer powders are being pursued for the development of coating internal surfaces, as less thermal energy is required to... Read More about Effect of particle and carbide grain sizes on a HVOAF WC-Co-Cr coating for the future application on internal surfaces: microstructure and wear.

Heat treatment of cold-sprayed C355 Al for repair: microstructure and mechanical properties (2017)
Journal Article

Cold gas dynamic spraying of commercially pure aluminum is widely used for dimensional repair in the aerospace sector as it is capable of producing oxide-free deposits of hundreds of micrometer thickness with strong bonding to the substrate, based on... Read More about Heat treatment of cold-sprayed C355 Al for repair: microstructure and mechanical properties.

Microstructural evolution in solution heat treatment of gas- atomised Al alloy (7075) powder for cold spray (2017)
Journal Article

Cold gas dynamic spray is being explored as a repair technique for high-value metallic components, given its potential to produce pore and oxide-free deposits of between several micrometers and several millimeters thick with good levels of adhesion a... Read More about Microstructural evolution in solution heat treatment of gas- atomised Al alloy (7075) powder for cold spray.

Microstructure and phase stability of suspension high velocity oxy-fuel sprayed yttria stabilised zirconia coatings from aqueous and ethanol based suspensions (2017)
Journal Article

Two commercial 7-8 wt.% Yttria Stabilised Zirconia (YSZ) suspensions were sprayed by Suspension High Velocity Oxy Fuel (SHVOF) thermal spraying for advanced high temperature coatings. Heat treatments of the free-standing coatings were conducted at 80... Read More about Microstructure and phase stability of suspension high velocity oxy-fuel sprayed yttria stabilised zirconia coatings from aqueous and ethanol based suspensions.

Alumina-graphene nanocomposite coatings fabricated by suspension high velocity oxy-fuel thermal spraying for ultra-low-wear (2017)
Journal Article

An alumina coating containing 1 wt.% graphene nanoplatelets (GNPs) is deposited for the first time by suspension high velocity oxy-fuel (SHVOF) thermal spraying – an emerging coating deposition technique. Raman spectroscopy shows the GNPs survive the... Read More about Alumina-graphene nanocomposite coatings fabricated by suspension high velocity oxy-fuel thermal spraying for ultra-low-wear.

Suspension high velocity oxy-fuel spraying of a rutile TiO2 feedstock: Microstructure, phase evolution and photocatalytic behaviour (2017)
Journal Article

© 2017 The Authors Nano-structured TiO2 coatings were produced by suspension high velocity oxy fuel (SHVOF) thermal spraying using water-based suspensions containing 30 wt% of submicron rutile powders (~180 nm). By changing the flame heat powers from... Read More about Suspension high velocity oxy-fuel spraying of a rutile TiO2 feedstock: Microstructure, phase evolution and photocatalytic behaviour.

Laser clad and HVOF sprayed Stellite 6 coating in chlorine rich environment with KCI at 700 °C (2017)
Journal Article

Laser clads and HVOF coatings from a stellite 6 alloy (Co–Cr–W–C alloy) on 304 stainless steel substrates were exposed both bare and with KCl deposits in 500 ppm HCl with 5% O2 for 250 h at 700 C. SEM/EDX and PXRD analyses with Rietveld refinement we... Read More about Laser clad and HVOF sprayed Stellite 6 coating in chlorine rich environment with KCI at 700 °C.

HVOF and laser cladded Fe-Cr-B coating in simulated biomass combustion: microstructure and fireside corrosion (2017)
Journal Article

Biomass is often considered as a low carbon alternative to fossil fuels in the power industry. However the heat exchangers in biomass plants can suffer from chloride based aggressive fireside corrosion. A commercially available amorphous Fe-Cr-B allo... Read More about HVOF and laser cladded Fe-Cr-B coating in simulated biomass combustion: microstructure and fireside corrosion.

Role of oxides and porosity on high temperature oxidation of liquid fuelled HVOF thermal sprayed Ni50Cr coatings (2017)
Journal Article

High chromium content in Ni50Cr thermally sprayed coatings can generate a dense and protective scale at the surface of coating. Thus, the Ni50Cr coating is widely used in high temperature oxidation and corrosion applications. A commercially available... Read More about Role of oxides and porosity on high temperature oxidation of liquid fuelled HVOF thermal sprayed Ni50Cr coatings.

Fabrication and microstrain evolution of Al-TiB2 composite coating by cold spray deposition (2017)
Journal Article

This paper investigates the microstructure evolution of Al-TiB2 coatings prepared by cold spraying. In situ Al-TiB2 composite powders containing uniformly distributed titanium diboride (TiB2) particles with a size range of 5 to 100 nm in the Al matri... Read More about Fabrication and microstrain evolution of Al-TiB2 composite coating by cold spray deposition.

Advanced diamond-reinforced metal matrix composites via cold spray: properties and deposition mechanism (2017)
Journal Article

Diamond-reinforced metal matrix composites (DMMC) have great potential for wear-resistance applications due to the superior hardness of the diamond component. Cold spray as an emerging coating technique is able to fabricate coatings or bulk materials... Read More about Advanced diamond-reinforced metal matrix composites via cold spray: properties and deposition mechanism.

High-temperature performance of ferritic steels in fireside corrosion regimes: temperature and deposits (2016)
Journal Article

The paper reports high temperature resistance of ferritic steels in fireside corrosion regime in terms of temperature and deposits aggressiveness. Four candidate power plant steels: 15Mo3, T22, T23 and T91 were exposed under simulated air-fired combu... Read More about High-temperature performance of ferritic steels in fireside corrosion regimes: temperature and deposits.

Suspension High Velocity Oxy-Fuel (SHVOF)-Sprayed Alumina Coatings: Microstructure, Nanoindentation and Wear (2016)
Journal Article

© 2016, ASM International. Suspension high velocity oxy-fuel spraying can be used to produce thermally sprayed coatings from powdered feedstocks too small to be processed by mechanical feeders, allowing formation of nanostructured coatings with impro... Read More about Suspension High Velocity Oxy-Fuel (SHVOF)-Sprayed Alumina Coatings: Microstructure, Nanoindentation and Wear.

Suspension high velocity oxy-fuel spraying of TiO2: a quantitative approach to phase composition (2016)
Journal Article

A range of coatings from a water based suspension of anatase has been prepared by suspension high velocity oxy-fuel spraying with the aim to study effects of heat power of the flame on phase composition, microstructure and surface topography. Three m... Read More about Suspension high velocity oxy-fuel spraying of TiO2: a quantitative approach to phase composition.

Gas and liquid-fuelled HVOF spraying of Ni50Cr coating: microstructure and high temperature oxidation (2016)
Journal Article

Ni50Cr thermally sprayed coatings are widely used for high temperature oxidation and corrosion in thermal power plants. In this study, a commercially available gas atomised Ni50Cr powder was sprayed onto a power plant alloy (ASME P92) using both gas... Read More about Gas and liquid-fuelled HVOF spraying of Ni50Cr coating: microstructure and high temperature oxidation.

A novel method for metal–diamond composite coating deposition with cold spray and formation mechanism (2016)
Journal Article

This paper describes the application of cold spray to the deposition of a diamond grade pre-coated with Cu and Ni. This is the first time that pre-coated diamond powders are used as the sole feedstock without the addition of binders (ductile phases)... Read More about A novel method for metal–diamond composite coating deposition with cold spray and formation mechanism.