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  Can micro-compression testing provide stress–strain data for thin films? A comparative study using Cu, VN, TiN and W coatings

Dehm, G., Wörgötter, H. P., Cazottes, S., Purswani, J. M., Gall, D., Mitterer, C., et al. (2009). Can micro-compression testing provide stress–strain data for thin films? A comparative study using Cu, VN, TiN and W coatings. Thin Solid Films, 518(5), 1517-1521. doi:10.1016/j.tsf.2009.09.070.

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Dehm, Gerhard1, 2, Autor           
Wörgötter, H. P.3, Autor           
Cazottes, Sophie2, Autor           
Purswani, J. M.4, Autor           
Gall, Daniel4, Autor           
Mitterer, Christian5, Autor           
Kiener, Daniel6, Autor           
Affiliations:
1Department Materialphysik, Montanuniversität Leoben, Austria, ou_persistent22              
2Erich Schmid Institute of Material Science, Austrian Academy of Sciences, Leoben, Austria, ou_persistent22              
3Materials Center Leoben, Forschungs GmbH, Leoben, Austria, ou_persistent22              
4Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA, ou_persistent22              
5Department of Physical Metallurgy and Materials Testing, Christian-Doppler Laboratory for Advanced Coatings, University of Leoben, Austria, ou_persistent22              
6Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Austria, ou_persistent22              

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 Zusammenfassung: Micro-compression testing using an instrumented micro- or nanoindenter equipped with a flat punch is a promising approach to measure the stress–strain response of miniaturized materials and to complement hardness and modulus measurements gained by nanoindendation. Focussed ion beam milling is employed to fabricate micron-sized compression pillars from 1 μm thick single crystal Cu(001), TiN(001), and VN(001) films grown on MgO(001), and from a 6.7 μm thick polycrystalline W coating deposited on Si(001). In situ micro-compression tests in a scanning electron microscope reveal reproducible stress–strain curves for W, a considerable statistical scatter in the flow stress for Cu and VN, and failure of TiN pillars by cleavage. A linear work-hardening rate of 2.7±1.2 GPa is determined for the polycrystalline W coating. The results are critically discussed taking into account material defects and the stiffness of the film-substrate system.

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Sprache(n): eng - English
 Datum: 2009-12-31
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1016/j.tsf.2009.09.070
 Art des Abschluß: -

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Titel: Thin Solid Films
  Kurztitel : Thin Solid Films
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Lausanne, Switzerland, etc. : Elsevier
Seiten: - Band / Heft: 518 (5) Artikelnummer: - Start- / Endseite: 1517 - 1521 Identifikator: ISSN: 0040-6090
CoNE: https://pure.mpg.de/cone/journals/resource/954925449792