Oxidation protection of carbon fiber by sol-gel derived boron doped yttria stabilized zirconia coatings

[Display omitted] •Carbon fibers were dip coated by a boron doped yttria stabilized zirconia sol.•Obtained zirconia coatings were confirmed by electron microscopy.•Coated carbon fibers were characterized by thermal gravimetry.•Coated carbon fibers exhibited a significant enhancement in oxidation res...

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Bibliographic Details
Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2018-03, Vol.229, p.59-64
Main Authors: Ratnayake, S.P., De Silva, N., Kaupuge, T.K., Weerasekera, T.S., Senarath Yapa, M.D, Karunaratne, V., Amaratunga, G.A.J.
Format: Article
Language:English
Subjects:
Boron fibers
Carbon fiber
Carbon fiber reinforced plastics
Carbon fibers
Composite materials
Nanoparticles
Oxidation
Oxidation protection coating
Phase composition
Protective coatings
Roasting
Sol-gel processes
Sols
Yttria stabilized zirconia
Yttrium oxide
Zirconium
Zirconium dioxide
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Summary:[Display omitted] •Carbon fibers were dip coated by a boron doped yttria stabilized zirconia sol.•Obtained zirconia coatings were confirmed by electron microscopy.•Coated carbon fibers were characterized by thermal gravimetry.•Coated carbon fibers exhibited a significant enhancement in oxidation resistance. The sol-gel approach was utilized to prepare boron doped yttria stabilized zirconia coated carbon fiber and their thermal characteristics were evaluated against yttria stabilized zirconia coated carbon fiber and uncoated fiber. Coated carbon fiber was characterized by TGA, SEM and FT-IR while calcined sols were analyzed by XRD to study the phase composition. Carbon fiber was coated multiple times and the coating thickness was observed to increase with the number of dipping cycles. Nanoparticles obtained by calcining the boron doped yttria stabilized zirconia system, exhibited the cubic phase while pure zirconia nanoparticles represented monoclinic and tetragonal phases. The sol system with Zr: B: Y molar ratio set as 1: 1: 0.14 was observed to provide superior oxidation protection of carbon fiber compared to the conventional yttria stabilized zirconia sol system. The new coating system showed promise concerning oxidation retardation of carbon fiber and its composites at high temperatures.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2017.12.011