TY  - JOUR
AU  - Mauer, Georg
AU  - Schlegel, Nadin
AU  - Guignard, Alexandre
AU  - Vassen, Robert
AU  - Guillon, Olivier
TI  - Effects of Feedstock Decomposition and Evaporation on the Composition of Suspension Plasma-Sprayed Coatings
JO  - Journal of thermal spray technology
VL  - 24
IS  - 7
SN  - 1059-9630
CY  - Boston, Mass.
PB  - Springer
M1  - FZJ-2015-01449
SP  - 1187-1194
PY  - 2015
AB  - Emerging new applications and growing demands of plasma-sprayed coatings have initiated the development of new plasma spray processes. One of them is suspension plasma spraying (SPS). The use of liquid feedstock such as suspensions yields higher flexibility compared to the conventional atmospheric plasma spray processes (APS) as even submicron- to nano-sized particles can be processed. This allows, e.g., achieving porous segmented or columnar-structured TBCs or thin and dense coatings for gas separation membranes. To exploit the potentials of such novel plasma spray processes, the plasma-feedstock interaction must be understood better.In this study, decomposition and evaporation of feedstock material during spraying were investigated, since particular difficulties can occur with respect to stoichiometry and phase composition of the deposits. Plasma conditions of SPS were analyzed by optical emission spectroscopy (OES). Experimental results are given, namely for gadolinium zirconate (GZO) and for lanthanum strontium cobalt ferrite (LSCF) deposition by SPS. Moreover, the applied OES approach is validated by comparison with the simpler actinometry method.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000363038600007
DO  - DOI:10.1007/s11666-015-0250-2
UR  - https://juser.fz-juelich.de/record/187942
ER  -