By a News Reporter-Staff News Editor at Journal of Technology -- Investigators publish new report on Ceramics. According to news reporting originating from Valencia, Spain, by VerticalNews correspondents, research stated, "In this work, Al2O3-13 wt% TiO2 submicron-nanostructured powders were deposited using atmospheric plasma spraying. The feedstocks were obtained by spray drying two starting suspensions of different solids content, prepared by adding nanosized TiO2 and submicron-sized Al2O3 powders to water."
Our news editors obtained a quote from the research from Valencia Polytechnic University, "The spray-dried granules were heat-treated to reduce their porosity and the powders were fully characterised in both untreated and thermally treated state. Comparison with two commercial feedstocks was carried out. Characterisation allowed a temperature for the thermal treatment to be chosen on the basis of the sprayability of the feedstock and the preservation as much as possible of the submicron-sized structure of the unfired agglomerates. Optimisation of the deposition conditions enabled the reconstituted powders to be successfully deposited, yielding coatings that were well bonded to the substrate. The coating microstructure, characterised by SEM, was mostly formed by a matrix of fully molten particles where the presence of semi-molten feedstock agglomerates was also observed. Moreover, microhardness, toughness, adhesion and tribological behaviours were determined, and the impact of the granule characteristics on these properties was studied. It was found that changing the feedstock characteristics allows controlling the coating quality and properties."
According to the news editors, the research concluded: "In general, good mechanical properties were obtained using a feedstock comprising a binary mixture of submicrometric Al2O3 and nanometric TiO2 particles in the spray-dried powder."
For more information on this research see: Atmospheric plasma spraying coatings from alumina-titania feedstock comprising bimodal particle size distributions. Journal of the European Ceramic Society, 2013;33(15-16):3313-3324. Journal of the European Ceramic Society can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier - www.elsevier.com; Journal of the European Ceramic Society - www.elsevier.com/wps/product/cws_home/405935)
The news editors report that additional information may be obtained by contacting M. Vicent, Valencia Polytechnic University, ITM, Valencia, Spain. Additional authors for this research include E. Bannier, R. Moreno, M.D. Salvador and E. Sanchez.
Keywords for this news article include: Spain, Europe, Valencia, Ceramics
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