Journal
SCRIPTA MATERIALIA
Volume 68, Issue 12, Pages 917-920Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2013.01.039
Keywords
Sputtering; CrN/AlN multilayers; Fracture; Crack; Coating
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Funding
- START project of the Austrian Science Fund FWF [Y371]
- Austrian Science Fund (FWF) [Y371] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [Y 371] Funding Source: researchfish
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In situ scanning electron microscopy compression tests clearly demonstrate that a multilayered arrangement of CrN and AlN when stabilized by coherency strains to its cubic metastable phase for AlN layer thicknesses below 3 nm - exhibits increased fracture toughness as compared to single-layered CrN. This allows increasing the maximum loading from similar to 5.25 to 6.80 GPa. If the AlN layers mainly crystallize in their stable wurtzite structure - for thicknesses above 3 nm spontaneous and fatal cracking occurs under loads as small as 3.80 GPa. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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