Naslov
Low thermal treatment optimisation of sol-gel derived composite-coating for multi-purpose functionality and protection of all-metals

Autori
Mandić, Vilko ; Tricoteaux, Arnaud ; Nivot, Christelle

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
BOOK OF ABSTRACTS MCM2017 / Gajović, Andreja ; Weber, Igor ; Kovačević, Goran ; Čadež, Vida ; Šegota, Suzana ; Peharec Štefanić, Petra ; Vidoš, Ana - Zagreb : Institut Ruđer Bošković ; Hrvatsko mikroskopijsko društvo, 2017, 511-512

ISBN
978-953-7941-19-2

Skup
13th Multinational Congress on Microscopy

Mjesto i datum
Rovinj, Hrvatska, 24.09.2017. - 29.09.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Ceramic coatings, Composite, Anticorrosive, Tribological, Sol-gel

Sažetak
Development of protective coatings for the metal surfaces has been continuous demand in wide industrial area and therefore was continuously scientifically researched. Inorganic as well as hybrid organic-inorganic coatings were found to be very favourable solutions. Recently achieved multifunctional layers shown it is possible to exhibit simultaneously both anticorrosion and tribological efficiency. However discrepancies arise upon consideration of: (a) the up-scale to high area, (b) the price of deposition techniques, (c) the overall stability and (d) the requirements for thermal treatment, all of which prevents real technological applicability. This investigation aims to surpass these discrepancies and yield multifunctional (hard, anticorrosive, tribo-effective) multi-layer coatings (2 or more layers) on behalf of advanced sol-gel-based (cheap, simple) procedure with lower-temperature treatment (applicable, easy scale-up). First of all we withhold from one-pot synthesis and thereof maximise distinctive properties in each of the layers. Sol-gel method was utilised to tailor different but compatible layers. This investigation aims to evaluate the feasibility of a crystalline coating, which was rarely done. As a (metal-contacted) protection-layer, i.e. corrosion barrier (both from environment and chemicals), dense, crystalline (anatase) and thin (50-100nm) was considered. This layer was shown to have low porosity and SS surface, closed pores and good mechanical properties. Next layer was the container-type layer ; it was shown to be thicker (300-500nm), consisting of amorphous TiO2, porous (open mezzo-pores with uniform pore distribution and size 10-50nm) capable of accepting infiltration with another liquid anti-corrosive agent (benzotriazole). This layer show great anti-corrosive behaviour with reasonable mechanical properties. The final layer consists of core-shell particles which somewhat penetrate the pores of the 2nd layer thus closing them (and close the infiltrated anti-corrosive liquid) and forming additional top layer. The tribo-active core-material was enclosed in outer hybrid shell for stability finally offering reasonable mechanical properties. Materials were extensively characterised using thermal, structural, microstructural and functional methods. Overall, the 3-layer-coating (<1µm) processed below 350°C shows physical, anti-corrosive efficiency and tribo-activity with good mechanical properties.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo, Temeljne tehničke znanosti

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