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Journal of Materials Science

Erschienen in:

01.07.2020 | Composites & nanocomposites

Ion-exchange modification of potassium magnesium titanate for high-performance wear–corrosion-resistant composite coatings

verfasst von: Ze Zhou, Chang Li, Liming Shen, Ningzhong Bao

Erschienen in: Journal of Materials Science | Ausgabe 28/2020

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Abstract

K₂MgTi₇O₁₆@K_0.8Mg_0.4Ti_1.6O₄(PMTC) core–shell composite whiskers and TiO₂ (TO) whiskers have been obtained from potassium magnesium titanate whisker (K_0.8Mg_0.4Ti_1.6O₄, KMTO) by a first different degree ion-controlled exchange reaction and a subsequent heat treatment. These materials have been successfully used as functional fillers to enhance the performance of fluorine–olefin vinyl ether copolymer (FEVE) fluorocarbon coatings. The tribological and electrochemical impedance spectroscopy results indicated that PMTC and TO whiskers can significantly enhance the friction and corrosion resistance of FEVE composite coatings compared with KMTO/FEVE composite coatings. Particularly, the 5 wt. % PMTC/FEVE composite coating displays an enhanced wear resistance (Friction coefficient is 0.632. Wear volume loss is 0.006 mm³) than that of pure FEVE coating. (Fiction coefficient is 0.865 and wear volume loss is 0.177 mm³.) And the |Z|_0.01 Hz value of 10 wt.% TO/FEVE composite coating is 10^9.8 Ω·cm², which indicates its highly protective nature when compared to that of pure coating (~ 10⁷ Ω·cm²). Besides, the microstructure of cross sections, worn surfaces and wear debris of the composite coatings was analyzed by scanning electron microscopy (SEM), and the related anti-wear and anti-corrosion mechanisms were revealed. The present process and design can be extended to the synthesis and modification of a variety of other layered materials including titanates, tantalates, chalcopyrites, etc.

Vorheriger Artikel Versatile application of a modern scanning electron microscope for materials characterization

Nächster Artikel Determining the crystal and electronic structures of the magnesium secondary battery cathode material MgCo2−xMnxO4 using first-principles calculations and a quantum beam during discharge

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Titel: Ion-exchange modification of potassium magnesium titanate for high-performance wear–corrosion-resistant composite coatings
verfasst von: Ze Zhou
Chang Li
Liming Shen
Ningzhong Bao
Publikationsdatum: 01.07.2020
Verlag: Springer US
Erschienen in: Journal of Materials Science / Ausgabe 28/2020
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-020-04992-x

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