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Synthesis and characterisation of compositionally complex coatings: Invited presentation
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Inorganic Chemistry.ORCID iD: 0000-0001-8617-4834
2016 (English)Conference paper, Oral presentation only (Other academic)
Abstract [en]

There is a clear tendency in the materials research to move towards more compositionally complexmaterials, using more elements in a single coating material. This is true both for entire structures,such as multi-layer coatings, but also single layers. The presentation will focus on the latter, and thechallenges such materials pose both from a synthesis / process point of view, and from a materialsanalysis point of view. Examples of such materials are complex solid solution phases, such as Cr-Al-O-N and Al-Ge-O-N, but also new classes of materials such as the high-entropy / concentratedsolid solution alloys and their nitrides, carbides and oxides.Synthesis using reactive sputter deposition offers many different possibilities to deposit multicomponentcoatings, with different types of targets (elemental, segmented, composite, alloy,compound, and powder), as well as different process modifications (dc, pulsed dc, HiPIMS, etc)and also the possibility to use one or several reactive gases. All this will influence the processes atthe target, the transport to the substrate, as well as the growth of the coating. The presentation willguide you through some basic concepts of attaining compositional control of your material, andexamples of what kind of pit-falls to avoid, and discuss the importance of understanding theatomistic processes from target to coating.From the above paragraph it is understood that it will never be obvious what is actually deposited.Therefore careful analysis of the deposited material will always be needed. This includes elementcomposition data, chemical bonding as well as structural information, which all becomes moredifficult to extract and interpret as the number of elements in the material increases. ¬Thepresentation will present some of the challenges that multi-component coatings give rise to, anddiscuss possible methods to overcome them.Examples will to a large extent be taken from the presenter’s recent research into quaternaryoxynitride materials based on AlN and high-entropy nitrides, but also from relevant literature.

Place, publisher, year, edition, pages
2016.
National Category
Other Materials Engineering Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-336811OAI: oai:DiVA.org:uu-336811DiVA: diva2:1167131
Conference
RSD 2016, Ghent
Available from: 2017-12-18 Created: 2017-12-18 Last updated: 2017-12-18

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