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Prediction of fracture in grain boundaries of nano‐coatings using cohesive zone elements
Author(s) -
Rezaei Shahed,
Wulfinghoff Stephan,
Reese Stefanie
Publication year - 2016
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201610070
Subject(s) - materials science , composite material , ceramic , high power impulse magnetron sputtering , grain boundary , robustness (evolution) , fracture (geology) , coating , boundary element method , cohesive zone model , sputter deposition , finite element method , sputtering , microstructure , structural engineering , thin film , nanotechnology , gene , engineering , biochemistry , chemistry
A cohesive zone element technique (CZ) is applied to study grain boundary fracture in nano coating layers (see [1]). This goes along with the investigations of the delamination and fracture behavior of the coatings and the substrate interface. The main motivation is to investigate antiadhesive and wear resistant properties of coatings made of ceramics produced by the High Power Pulsed Magnetron Sputtering (HPPMS) technique [2]. Different physical conditions in HPPMS result into different grain morphologies with different mechanical properties. Therefore prediction of fracture and damage in such systems can lead to the optimum choice of process parameters in order to gain the best fracture resistance properties for the coatings. To illustrate the applicability of the model, several simulations with different mechanical and structural properties are performed. The developed CZ element model is capable of modeling the separation, the contact and also the irreversible reloading conditions in different directions [3]. The model is further developed to be applicable for geometrically complex interfaces including different bonding behaviors, with a high robustness. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)