Please use this identifier to cite or link to this item: doi:10.22028/D291-31133
Title: Micromechanical investigations of CVD coated WC-Co cemented carbide by micropillar compression
Author(s): El Azhari, Idriss
García, José
Zamanzade, Mohammad
Soldera, Flavio
Pauly, Christoph
Motz, Christian
Llanes, Luis
Mücklich, Frank
Language: English
Title: Materials & Design
Volume: 186
Publisher/Platform: Elsevier
Year of Publication: 2019
Free key words: WC plasticity
Cobalt deformation
Zr(C,N) (ZrCN) CVD hard coating
TiN interlayer
Interfacial strength
DDC notations: 600 Technology
Publikation type: Journal Article
Abstract: Deformation behavior of an industrial coated cemented carbide (WC-Co substrate coated with CVD multilayer of TiN/Zr(C,N)/Ti(C,N,O)/Al2O3) was investigated by means of micropillar compression method. In addition to the WC-Co substrate pillars, new composite pillar combination consisting of substrate, TiN interlayer and carbonitride hard coating were tested. The study targeted to document and analyze interactions between different phases and components (substrate, interlayer and coating) while subjected to compressive stress. It is found that deformation of the substrate depends mainly on the assemblage and the distribution of WC and Co phases within the pillar. The phase assemblage is subjected to changes after deformation which has an impact on the stiffness. Detailed analysis of plastic deformation within WC coarse grains pointed out that strain energy can be extensively dissipated in this phase by means of single and multiple slip. The composite/hybrid pillar formed by association of the substrate and the coating enhanced the ultimate strength in comparison to their respective individual components, highlighting the effective load-bearing response of coating and substrate acting as a coated system. This assessment was further supported by the excellent interfacial strength attested by the established TiN interlayer between the substrate and the coating.
DOI of the first publication: 10.1016/j.matdes.2019.108283
Link to this record: urn:nbn:de:bsz:291--ds-311330
ISSN: 0264-1275
Date of registration: 8-Jun-2020
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Christian Motz
NT - Prof. Dr. Frank Mücklich
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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