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Adhesive-deformation relationships and mechanical properties of nc-AlCrN/a-SiNx hard coatings deposited at different bias voltages
Slovak Univ Technol Bratislava, Slovakia.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, Faculty of Science & Engineering.
Slovak Univ Technol Bratislava, Slovakia.
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2018 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 650, p. 11-19Article in journal (Refereed) Published
Abstract [en]

A series of Al-Cr-Si-N hard coatings were deposited on WC-Co substrates with a negative substrate bias voltage ranging from -50 to -200 V using cathodic arc evaporation system. A Rockwell-C adhesion test demonstrated that excellent adhesion was observed at lower bias voltages of -50 V and -80 V, while further increases in bias voltage up to -200 V led to severe delamination and worsening of the overall adhesion strength. X-ray diffraction and transmission electron microscopy analysis revealed a single phase cubic B1-structure identified as an AlCrN solid solution with a nanocomposite microstructure where cubic AlCrN nanocrystals were embedded in a thin continuous amorphous SiNx matrix. Coatings exhibited a 002-texture evolution that was more pronounced at higher bias voltages (amp;gt;=-120 V). Stress-induced cracks were observed inside the coatings at high bias voltages (amp;gt;=-150 V), which resulted in stress relaxation and a decline in the overall residual stresses.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2018. Vol. 650, p. 11-19
Keyword [en]
Aluminum-chromium-silicon-nitride; Hard coating; Lateral rotating cathode; Adhesion; Deformation; Hardness; Transmission electron microscopy
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-145738DOI: 10.1016/j.tsf.2018.02.006ISI: 000426426200003OAI: oai:DiVA.org:liu-145738DiVA, id: diva2:1192530
Note

Funding Agencies|Ministry of Education, Science, Research and Sport of the Slovak Republic within the Research and Development Operational Programme [ITMS 26240220084, ITMS: 26220120048]; Slovak Research and Development Agency [APVV-15-0168, APVV-14-0173]

Available from: 2018-03-22 Created: 2018-03-22 Last updated: 2018-03-22

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