All Outputs (48)

Mechanical properties and microstructure of VPS and HVOF CoNiCrAlY coatings (2011)
Journal Article

HVOF and VPS coatings were sprayed using a Praxair (CO-210-24) CoNiCrAlY powder. Free standing coatings underwent vacuum annealing at different temperatures for times of up to 840h. Feedstock powder, as-sprayed and annealed coatings were characterise... Read More about Mechanical properties and microstructure of VPS and HVOF CoNiCrAlY coatings.

The effects of microstructural features on the performance gap in corrosion resistance between bulk and HVOF sprayed Inconel 625 (2010)
Journal Article

It is commonly observed that there is a performance gap between the corrosion resistance of thermally sprayed coatings and the equivalent bulk material. This is attributed to the significantly modified microstructure of the sprayed coatings. However,... Read More about The effects of microstructural features on the performance gap in corrosion resistance between bulk and HVOF sprayed Inconel 625.

X-ray photoelectron spectroscopy study of the passive films formed on thermally sprayed and wrought Inconel 625 (2010)
Journal Article

There is a well known performance gap in corrosion resistance between thermally sprayed corrosion resistant coatings and the equivalent bulk materials. Interconnected porosity has an important and well known effect, however there are additional relev... Read More about X-ray photoelectron spectroscopy study of the passive films formed on thermally sprayed and wrought Inconel 625.

Investigation into the effect of beam shape on melt pool characteristics using analytical modelling (2010)
Journal Article

An established analytical model is used to simulate an extended laser beam. Multiple Gaussian sources are superimposed to form a rectangular beam and results are compared with a single circular Gaussian source model as well as experimental results fr... Read More about Investigation into the effect of beam shape on melt pool characteristics using analytical modelling.

Visualisation of the local electrochemical activity of thermally-sprayed anti-corrosion coatings using scanning electrochemical microscopy (2009)
Journal Article

Scanning electrochemical microscopy was used to probe the local electrochemical activity of anti-corrosion coatings formed from Inconel 625, a Ni-Cr-Mo alloy commonly used in engineering applications. The coatings were formed using a high velocity ox... Read More about Visualisation of the local electrochemical activity of thermally-sprayed anti-corrosion coatings using scanning electrochemical microscopy.

The effect of laser transformation notching on the controlled fracture of a high carbon (C70S6 ) steel (2008)
Journal Article

A high carbon (C70S6) steel has been laser surface treated using CO2 and Diode lasers in order to produce an embrittled region to act as a fracture notch. Such a process has been investigated as a precursor to the fracture splitting of automotive eng... Read More about The effect of laser transformation notching on the controlled fracture of a high carbon (C70S6 ) steel.

Inhibition of metal dusting using thermal spray coatings and laser treatment (2006)
Journal Article

Alloy 600 and Alloy 800H are susceptible to metal dusting. Both alloys were thermally sprayed with two different corrosion resistant coatings: Ni50Cr and Ni31Cr11Al0.6Y. Laser remelting was used to enhance further the effectiveness of these coatings... Read More about Inhibition of metal dusting using thermal spray coatings and laser treatment.

Inhibition of metal dusting of alloy 800H by laser surface melting (2006)
Journal Article

Metal dusting is a catastrophic carburisation phenomenon that occurs at temperatures of 450-850°C in atmospheres of high carbon activity. The resistance of alloys to corrosion, including metal dusting, relies on the formation of a dense, adherent oxi... Read More about Inhibition of metal dusting of alloy 800H by laser surface melting.