TY - GEN
T1 - Phase composition changes of plasma sprayed TiO2 coatings deposited under different in-flight temperatures and velocities
AU - Cizek, J.
AU - Khor, K. A.
PY - 2009
Y1 - 2009
N2 - Changes in phase composition of titania (TiO2) coatings were studied with respect to the in-flight characteristics of the powder during atmospheric plasma spraying. Utilizing SprayWatch CCD camera system, average temperature and velocity of TiO2 particles were recorded within the plasma jet under various spraying parameters modified according to Taguchi design of experiment. Six unique combinations of parameters resulting in low/medium/high in-flight temperatures and/or velocities were selected for coating preparation. Phase composition of the produced coatings was assessed using X-ray diffractometry and numerically specified using Rietveld analysis. Relative changes of the composition with respect to the phase composition of the initial heat treated powder feedstock were observed with respect to the measured in-flight characteristics. It was found the in-flight temperature has moderate effect on the phase composition of the produced coatings. For comparison purposes, additional coatings were deposited utilizing cold spray technology. Inferior phase composition changes were observed in cold sprayed samples.
AB - Changes in phase composition of titania (TiO2) coatings were studied with respect to the in-flight characteristics of the powder during atmospheric plasma spraying. Utilizing SprayWatch CCD camera system, average temperature and velocity of TiO2 particles were recorded within the plasma jet under various spraying parameters modified according to Taguchi design of experiment. Six unique combinations of parameters resulting in low/medium/high in-flight temperatures and/or velocities were selected for coating preparation. Phase composition of the produced coatings was assessed using X-ray diffractometry and numerically specified using Rietveld analysis. Relative changes of the composition with respect to the phase composition of the initial heat treated powder feedstock were observed with respect to the measured in-flight characteristics. It was found the in-flight temperature has moderate effect on the phase composition of the produced coatings. For comparison purposes, additional coatings were deposited utilizing cold spray technology. Inferior phase composition changes were observed in cold sprayed samples.
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U2 - 10.1361/cp2009itsc1002
DO - 10.1361/cp2009itsc1002
M3 - Conference contribution
AN - SCOPUS:76749113434
SN - 9781615030040
T3 - Proceedings of the International Thermal Spray Conference
SP - 1002
EP - 1005
BT - Expanding Thermal Spray Performance to New Markets and Applications - Proceedings of the 2009 International Thermal Spray Conference, ITSC 2009
T2 - Expanding Thermal Spray Performance to New Markets and Applications - 2009 International Thermal Spray Conference, ITSC 2009
Y2 - 4 May 2009 through 7 May 2009
ER -