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@ARTICLE{Berger:845009,
author = {Berger, Lutz-Michael and Sempf, Kerstin and Sohn, Yoo Jung
and Vaßen, Robert},
title = {{I}nfluence of {F}eedstock {P}owder {M}odification by
{H}eat {T}reatments on the {P}roperties of {APS}-{S}prayed
${A}l2{O}3-40\%$ {T}i{O}2 {C}oatings27},
journal = {Journal of thermal spray technology},
volume = {27},
number = {4},
issn = {1544-1016},
address = {Boston, Mass.},
publisher = {Springer},
reportid = {FZJ-2018-02338},
pages = {654 - 666},
year = {2018},
abstract = {The formation and decomposition of aluminum titanate
(Al2TiO5, tialite) in feedstock powders and coatings of the
binary Al2O3-TiO2 system are so far poorly understood. A
commercial fused and crushed $Al2O3-40\%TiO2$ powder was
selected as the feedstock for the experimental series
presented in this paper, as the composition is close to that
of Al2TiO5. Part of that powder was heat-treated in air at
1150 and 1500 °C in order to modify the phase composition,
while not influencing the particle size distribution and
processability. The powders were analyzed by thermal
analysis, XRD and FESEM including EDS of metallographically
prepared cross sections. Only a maximum content of about 45
$wt.\%$ Al2TiO5 was possible to obtain with the heat
treatment at 1500 °C due to inhomogeneous distribution of
Al and Ti in the original powder. Coatings were prepared by
plasma spraying using a TriplexPro-210 (Oerlikon Metco) with
Ar-H2 and Ar-He plasma gas mixtures at plasma power levels
of 41 and 48 kW. Coatings were studied by XRD, SEM including
EDS linescans of metallographically prepared cross sections,
and microhardness HV1. With the exception of the powder
heat-treated at 1500 °C an Al2TiO5-Ti3O5
(tialite–anosovite) solid solution Al2−xTi1+xO5 instead
of Al2TiO5 existed in the initial powder and the coatings.},
cin = {IEK-1},
ddc = {670},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113)},
pid = {G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000430378200009},
doi = {10.1007/s11666-018-0716-0},
url = {https://juser.fz-juelich.de/record/845009},
}