2026-04-14T02:28:24Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1578172025-12-04T20:52:56Zcom_2072_1057col_2072_478796col_2072_478917

00925njm 22002777a 4500 dc Robotti, Marco author Dosta Parras, Sergi author García Cano, Irene author Concustell i Fargas, Amadeu author Cinca i Luis, Núria author Guilemany, J. M. (José María) author 2020-04-28T08:16:55Z 2020-04-28T08:16:55Z 2016-04-19 2020-04-28T08:16:56Z Inside the wide field of thermal spray, the possibility to spray ceramic nano-particles by Low Pressure Cold Gas Spray (LP-CGS) represents an interesting and innovative trend. In this work, titanium dioxide TiO2 nanoparticles were mixed with a polymer in order to obtain a tailor-made nanocomposite powder and afterwards cold-sprayed coatings were produced, which might be attractive for their photocatalytic activity. Firstly, two different routes were used to incorporate the ceramic nanoparticles within the polymeric matrix: Attrition Milling (AM) and Cryogenic Milling (CM). Samples composition was not varied, while milling time was changed. The main objective was to investigate the mechanical physical union of TiO2 nanoparticles around polymeric microparticles. The effect of ceramic particles on the structure and morphology of the polymer, as well as the influence of the temperature of the different combining processes were studied. The fundamental properties of the nanocomposite mixture were investigated by Scanning Electron Microscopy (SEM), Laser Scattering (LS Beckman Coulter) and X-ray Diffraction (XRD). Secondly, the best mechanically combined mixture was selected in order to be sprayed by LP-CGS technology. Adequate spraying parameters were chosen in order to develop different composite coatings. Thickness, roughness and porosity of manufactured products were measured. Nanopartícules Revestiments Nanoparticles Coatings Attrition and cryogenic milling production for low pressure cold gas spray and composite coatings characterization