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Characterisation of dispersions within annealed HVOLF thermally sprayed AlSnCu coatings

By Chang-Jing Kong, Grigore Moldovan, Mike W. Fay, D. Graham McCartney and Paul D. Brown


High velocity oxy-liquid fuel (HVOLF) AlSnCu coatings are characterised following annealing for up to 5 hours at 300°C. A combination of statistical analysis of BSE images and TEM observations demonstrate the decrease in the number of sub-micron and nanoscale Sn particles with annealing, commensurate with a decrease in the coating microhardness. TEM evidence further suggests the coarsening of nanoscale Sn through a mechanism of a liquid phase migration within the Al matrix. EELS and EFTEM additionally allow the identification of the precipitation of theta'

Publisher: Institute of Physics Publishing
Year: 2004
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Provided by: Nottingham ePrints

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