Authors: Chigozie K Muoto Eric H Jordan Maurice Gell Mark Aindow
Publish Date: 2011/03/24
Volume: 20, Issue: 4, Pages: 802-
Abstract
In solution precursor plasma spray chemical precursor solutions are injected into a standard plasma torch and the final material is formed and deposited in a single step This process has several attractive features including the ability to rapidly explore new compositions and to form amorphous and metastable phases from molecularly mixed precursors Challenges include a moderate deposition rates due to the need to evaporate the precursor solvent b dealing on a case by case basis with precursor characteristics that influence the spray process viscosity endothermic and exothermic reactions the sequence of physical states through which the precursor passes before attaining the final state etc Desirable precursor properties were identified by comparing an effective precursor for yttriastabilized zirconia with four less effective candidate precursors for MgOY2O3 The critical parameters identified were a lack of major endothermic events during precursor decomposition and highly dense resultant particlesThe authors thank Dr Dianying Chen for helpful discussions Dr Jack Gromek for assistance with the Xray experiments and Dr Roger Ristau for assistance with the FIB SEM and TEM experiments This work was supported by Raytheon Company as part of a DARPAsponsored ONR project
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