Olivier Guillon

New method shows promise repairing localized damage in thermal barrier coatings

By Lisa McDonald / July 12, 2022

Repairing localized damage in thermal barrier coatings on aircraft turbine blades can require full coat removal and reapplication to avoid blocking cooling holes in the blade. Forschungszentrum Jülich researchers proposed a new laser-cladding-based additive manufacturing technique that shows promise repairing localized damage without the need for full coat removal.

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Harmonized testing procedure more accurately determines ionic conductivity of ceramic electrolytes

By Lisa McDonald / July 5, 2022

Deviations in the reported ionic conductivity of nominally identical ceramic electrolytes can be attributed in part to differences in the measurement and analysis methods used. Researchers in Germany developed a harmonized testing procedure that facilitates reliable assessment of errors that are due to inherent sample properties rather than analysis-related choices.

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New wiki on ceramics processing—ready to join us?

By Lisa McDonald / September 21, 2021

To date, there are few textbooks that cover the topic of ceramic processing well. A new wiki initiated by ACerS members Olivier Guillon and Wolfgang Rheinheimer provides a platform for practical articles to help anybody working on ceramics to set up their lab.

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No more inert atmospheres—Molten salt synthesis prevents oxidation of materials in air

By Lisa McDonald / April 19, 2019

Nonoxide ceramics typically undergo high-temperature synthesis in an inert atmosphere to prevent spontaneous oxidation. Researchers at Forschungszentrum Jülich have now found that potassium bromide keeps nonoxide ceramics from oxidizing when synthesized in normal air.

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Transparent ceramics: Stronger than Gorilla Glass

By Lisa McDonald / December 21, 2018

Jülich scientists created yttria-coated transparent zirconia ceramics that demonstrated fracture toughness values far higher than tempered glass. Their method is suitable for industrial mass production.

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Previews of the latest articles in the Journal of the American Ceramic Society

By Eileen De Guire / May 14, 2012

New papers that have been accepted for publication in the Journal of the American Ceramic Society are posted to “Early View” on the Wiley website and can be read even before…

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