Abstract
Cr 1-x Al x N 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 AlO 2 and Al 2 O 3 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 Cr 1-x Al x N 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 Cr 1-x Al x N coating.
| Original language | English |
|---|---|
| Pages (from-to) | 22094-22104 |
| Number of pages | 11 |
| Journal | RSC Advances |
| Volume | 7 |
| Issue number | 36 |
| Early online date | 20 Apr 2017 |
| DOIs | |
| Publication status | Published - 2017 |
| Externally published | Yes |
Fingerprint
Cite this
}
Experimental and predicted mechanical properties of Cr 1-x AI x N thin films, at high temperatures, incorporating in situ synchrotron radiation X-ray diffraction and computational modelling. / Mohammadpour, Ehsan; Jiang, Zhong Tao; Altarawneh, Mohmmednoor; Mondinos, Nicholas; Rahman, M. Mahbubur; Lim, H. N.; Huang, N. M.; Xie, Zonghan; Zhou, Zhi Feng; Dlugogorski, Bogdan Z.
In: RSC Advances, Vol. 7, No. 36, 2017, p. 22094-22104.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Experimental and predicted mechanical properties of Cr 1-x AI x N thin films, at high temperatures, incorporating in situ synchrotron radiation X-ray diffraction and computational modelling
AU - Mohammadpour, Ehsan
AU - Jiang, Zhong Tao
AU - Altarawneh, Mohmmednoor
AU - Mondinos, Nicholas
AU - Rahman, M. Mahbubur
AU - Lim, H. N.
AU - Huang, N. M.
AU - Xie, Zonghan
AU - Zhou, Zhi Feng
AU - Dlugogorski, Bogdan Z.
PY - 2017
Y1 - 2017
N2 - Cr 1-x Al x N 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 AlO 2 and Al 2 O 3 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 Cr 1-x Al x N 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 Cr 1-x Al x N coating.
AB - Cr 1-x Al x N 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 AlO 2 and Al 2 O 3 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 Cr 1-x Al x N 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 Cr 1-x Al x N coating.
UR - http://www.scopus.com/inward/record.url?scp=85021722115&partnerID=8YFLogxK
U2 - 10.1039/c7ra00342k
DO - 10.1039/c7ra00342k
M3 - Article
VL - 7
SP - 22094
EP - 22104
JO - RSC Advances: an international journal to further the chemical sciences
JF - RSC Advances: an international journal to further the chemical sciences
SN - 2046-2069
IS - 36
ER -