Characterisation of dispersions within annealed HVOLF thermally sprayed AlSnCu coatings
Kong, Chang-Jing and Moldovan, Grigore and Fay, Mike W. and McCartney, D. Graham and Brown, Paul D. (2004) Characterisation of dispersions within annealed HVOLF thermally sprayed AlSnCu coatings. In: Electron Microscopy and Analysis 2003: Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference, University of Oxford, 3-5 September 2003. Institute of Physics conference series (179). Institute of Physics Publishing, Bristol, pp. 245-248. ISBN 0750309679
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'.
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