Synthesis and characterization of TiO2/GE nanocomposite films deposited on AISI 304 stainless steel
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2024
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BRAZIL MRS MEETING, 22nd
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Resumo
TiO2 and TiO2/exfoliated graphite (GE) films were prepared by the sol-gel method and
applied to the surface of AISI 304 stainless steel using the cold spray technique. Initially,
natural graphite was subjected to the liquid phase exfoliation process in an aqueous solution
containing isopropanol and acetone under UVC irradiation, where expanded graphite was
obtained. A solution containing titanium isopropoxide and ethanol was prepared to obtain
the sol. The exfoliated graphite, after drying, was then added to the solution in
concentrations between 2.5 and 10%, mass/volume ratio. The films were dried in an oven at
100ºC and heat treated at temperatures between 400 and 500 ºC in a tubular oven, under
an argon atmosphere. Electrochemical techniques, field emission gun scanning electron
microscopy (SEM-FEG), Raman spectroscopy and X-ray diffraction were used to
characterize the coatings. The results confirm the formation of the anatase phase in all films
and the presence of GE in the composite films. The films have a cracked morphology and
TiO2 and GE particles on the surface of the sample were present. The samples were
evaluated using potential x time and linear polarization techniques in a 3.5% NaCl aqueous
solution at room temperature. The corrosion resistance of the samples increased compared
to the substrate, suggesting that the coating act as a physical barrier [1].
Como referenciar
SANTOS, THIAGO F. dos; COTINHO, SAMUEL P.; CORREA, OLANDIR V.; PILLIS, MARINA F. Synthesis and characterization of TiO2/GE nanocomposite films deposited on AISI 304 stainless steel. In: BRAZIL MRS MEETING, 22nd, September 29 - October 3, 2024, Santos, SP. Abstract... São Carlos, SP: Aptor Software, 2024. p. 334-334. Disponível em: https://repositorio.ipen.br/handle/123456789/48945. Acesso em: 12 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.