Experimental and predicted mechanical properties of Cr1−xAIxN thin films, at high temperatures, incorporating in situ synchrotron radiation X-ray diffraction and computational modelling

E. Mohammadpour; Z-T Jiang; M. Altarawneh; N. Mondinos; M.M. Rahman; H.N. Lim; N.M. Huang; Z. Xie; Z-F Zhou; B.Z. Dlugogorski

doi:10.1039/c7ra00342k

$Experimental and predicted mechanical properties of Cr1−xAIxN thin films, at high temperatures, incorporating in situ synchrotron radiation X-ray diffraction and computational modelling$

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Experimental and predicted mechanical properties of Cr1−xAIxN thin films, at high temperatures, incorporating in situ synchrotron radiation X-ray diffraction and computational modelling

E. Mohammadpour, Z-T Jiang, M. Altarawneh, N. Mondinos, M.M. Rahman, H.N. Lim, N.M. Huang, Z. Xie, Z-F Zhou and B.Z. Dlugogorski

RSC Advances, Vol.7(36), pp.22094-22104

2017

DOI: https://doi.org/10.1039/c7ra00342k

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Abstract

Cr1−xAlxN coatings, synthesised by an unbalanced magnetic sputtering system, showed improved microstructure and mechanical properties for ∼14–21% Al content. In situ SR-XRD analysis indicated various crystalline phases in the coatings that included: CrN, AlN, α-Cr with small amounts of AlO2 and Al2O3 over the 25–700 °C range. Al doping improves resistance to crystal growth, stress release and oxidation resistance of the coatings. Al doping also enhances the coating hardness (H) from 29 to 42 GPa, elastic modulus (E) from 378 to 438 GPa and increased the resistance to deformation. First-principles and quasi-harmonic approximation (QHA) studies on bulk CrN and AlN were incorporated to predict the thermo-elastic properties of Cr1−xAlxN thin film coatings in the temperature range of 0–1500 °C. The simulated results at T = 1500 °C give a predicted hardness of H = ∼41.5 GPa for a ∼21% Al doped Cr1−xAlxN coating.

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Title: Experimental and predicted mechanical properties of Cr1−xAIxN thin films, at high temperatures, incorporating in situ synchrotron radiation X-ray diffraction and computational modelling
Authors/Creators: E. Mohammadpour (Author/Creator) - Murdoch University
Z-T Jiang (Author/Creator) - Murdoch University
M. Altarawneh (Author/Creator) - Murdoch University
N. Mondinos (Author/Creator) - Murdoch University
M.M. Rahman (Author/Creator) - Murdoch University
H.N. Lim (Author/Creator) - Universiti Putra Malaysia
N.M. Huang (Author/Creator) - Xiamen University Malaysia
Z. Xie (Author/Creator) - The University of Adelaide
Z-F Zhou (Author/Creator) - City University of Hong Kong
B.Z. Dlugogorski (Author/Creator) - Murdoch University
Publication Details: RSC Advances, Vol.7(36), pp.22094-22104
Publisher: Royal Society of Chemistry
Identifiers: 991005540099707891
Murdoch Affiliation: School of Engineering and Information Technology
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 5 Physics; 5.188 Deposition, Hardening & Coating; 5.188.318 Nitride Coatings
Web Of Science research areas: Chemistry, Multidisciplinary
ESI research areas: Chemistry