Schmid, Christoph ; Hetzner, Harald ; Tremmel, Stephan ; Hilpert, Felix ; Durst, Karsten (2014)
Tailored Mechanical Properties and Residual Stresses of a-C:H:W Coatings.
In: Advanced Materials Research, 996
doi: 10.4028/www.scientific.net/AMR.996.14
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In this study, three different a-C:H:W coatings with predefined hardness values, ranging from 10 up to 16 GPa, were deposited by adjusting bias voltage according to a previously created regression model. For this purpose, the influence of the main process parameters of the used reactive unbalanced magnetron sputtering process on the mechanical properties of the a-C:H:W coating was investigated previously by nanoindentation. For a systematical evaluation of the single effects, parameters were varied according to a central composite design. The three coating variants of this study were investigated in terms of microstructure, mechanical properties and residual stresses. It turned out, that by the use of the regression model, a-C:H:W coatings with tailored mechanical properties can be deposited. Residual stresses were measured by means of focused ion beam milling of a double-slit geometry, which causes the internal stresses to relax, and mapping of the resultant relief strain by digital image correlation. A linear relation between the applied bias voltage and the hardness, the modulus of the coating as well as the determined relief strain was observed. Thus, residual stresses of the coatings increase disproportionately with applied bias voltage. The obtained results can be helpful for tailored coating design and further optimization of a-C:H:W coatings.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Schmid, Christoph ; Hetzner, Harald ; Tremmel, Stephan ; Hilpert, Felix ; Durst, Karsten |
| Art des Eintrags: | Bibliographie |
| Titel: | Tailored Mechanical Properties and Residual Stresses of a-C:H:W Coatings |
| Sprache: | Englisch |
| Publikationsjahr: | 2014 |
| Verlag: | Trans Tech Publications, Switzerland |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Materials Research |
| Jahrgang/Volume einer Zeitschrift: | 996 |
| DOI: | 10.4028/www.scientific.net/AMR.996.14 |
| Kurzbeschreibung (Abstract): | In this study, three different a-C:H:W coatings with predefined hardness values, ranging from 10 up to 16 GPa, were deposited by adjusting bias voltage according to a previously created regression model. For this purpose, the influence of the main process parameters of the used reactive unbalanced magnetron sputtering process on the mechanical properties of the a-C:H:W coating was investigated previously by nanoindentation. For a systematical evaluation of the single effects, parameters were varied according to a central composite design. The three coating variants of this study were investigated in terms of microstructure, mechanical properties and residual stresses. It turned out, that by the use of the regression model, a-C:H:W coatings with tailored mechanical properties can be deposited. Residual stresses were measured by means of focused ion beam milling of a double-slit geometry, which causes the internal stresses to relax, and mapping of the resultant relief strain by digital image correlation. A linear relation between the applied bias voltage and the hardness, the modulus of the coating as well as the determined relief strain was observed. Thus, residual stresses of the coatings increase disproportionately with applied bias voltage. The obtained results can be helpful for tailored coating design and further optimization of a-C:H:W coatings. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Physikalische Metallkunde 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 03 Dez 2014 12:47 |
| Letzte Änderung: | 03 Dez 2014 12:47 |
| PPN: | |
| Sponsoren: | The authors gratefully acknowledge the funding of the German Research Council (DFG) within the DFG project Du-424/7-1 and the scope of the Transregional Collaborative Research Centre on sheet bulk metal forming (SFB/TR 73) in the subproject B4. |
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