Influence of long-term aqueous exposure on surface properties of plasma sprayed oxides Al 2 O 3 , TiO 2 and their mixture Al 2 O 3 -13TiO 2

Mika Harju, Mikael Järn, Per Dahlsten, Jarl B. Rosenholm, Tapio Mäntylä

Tutkimustuotos: LehtiartikkeliArtikkeliTieteellinenvertaisarvioitu

19 Sitaatiot (Scopus)

Abstrakti

The surface properties of plasma sprayed Al 2 O 3 - and TiO 2 -based coating materials were characterized in order to investigate the influence of surface strain and phase inhomogenity. The materials were water exposed up to 8 months. The bulk crystallographic structure, dissolution behaviour, effective charge (zeta potential, isoelectric point), surface compositions and oxidation states were determined. In addition, the properties of the aging solutions, such as conductivity, supernatant pH (point of zero charge), and redox potential, were monitored during aging. It was shown that the materials were stable under aging conditions, but that considerable surface rearrangements, such as dissolution-reprecipitation and surface site redistributions may occur. However, overall only minor changes in surface properties results from this restructuring process. © 2008 Elsevier B.V. All rights reserved.
AlkuperäiskieliEnglanti
Sivut7272-7279
Sivumäärä8
JulkaisuApplied Surface Science
Vuosikerta254
Numero22
DOI - pysyväislinkit
TilaJulkaistu - 2008
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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