| HOLZAPFEL, Damian M, Denis MUSIC, Stanislav MRAZ, Soheil Karimi AGHDA, Martin ETTER, Pavel ONDRAČKA, Marcus HANS, Dimitri BOGDANOVSKI, Simon EVERTZ, Lena PATTERER, Paul SCHMIDT, Alexander SCHOKEL, Anders O ERIKSSON, Mirjam ARNDT, Daniel PRIMETZHOFER and Jochen M SCHNEIDER. Influence of ion irradiation-induced defects on phase formation and thermal stability of Ti0.27Al0.21 N (0.52) coatings. Acta Materialia. OXFORD: Elsevier Ltd, 2022, vol. 237, 15 pp. ISSN 1359-6454. Available from: https://dx.doi.org/10.1016/j.actamat.2022.118160. |
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@article{2297081,
author = {Holzapfel, Damian M and Music, Denis and Mraz, Stanislav and Aghda, Soheil Karimi and Etter, Martin and Ondračka, Pavel and Hans, Marcus and Bogdanovski, Dimitri and Evertz, Simon and Patterer, Lena and Schmidt, Paul and Schokel, Alexander and Eriksson, Anders O and Arndt, Mirjam and Primetzhofer, Daniel and Schneider, Jochen M},
article_location = {OXFORD},
doi = {http://dx.doi.org/10.1016/j.actamat.2022.118160},
keywords = {Frenkel pairs; thermal stability; TiAlN; Hard coatings; Cathodic arc evaporation},
issn = {1359-6454},
journal = {Acta Materialia},
title = {Influence of ion irradiation-induced defects on phase formation and thermal stability of Ti0.27Al0.21 N (0.52) coatings},
volume = {237},
year = {2022}
}
TY - JOUR
ID - 2297081
AU - Holzapfel, Damian M - Music, Denis - Mraz, Stanislav - Aghda, Soheil Karimi - Etter, Martin - Ondračka, Pavel - Hans, Marcus - Bogdanovski, Dimitri - Evertz, Simon - Patterer, Lena - Schmidt, Paul - Schokel, Alexander - Eriksson, Anders O - Arndt, Mirjam - Primetzhofer, Daniel - Schneider, Jochen M
PY - 2022
TI - Influence of ion irradiation-induced defects on phase formation and thermal stability of Ti0.27Al0.21 N (0.52) coatings
JF - Acta Materialia
VL - 237
PB - Elsevier Ltd
SN - 13596454
KW - Frenkel pairs
KW - thermal stability
KW - TiAlN
KW - Hard coatings
KW - Cathodic arc evaporation
N2 - The influence of changes induced by ion irradiation on structure and thermal stability of metastable cu-bic (Ti,Al)N coatings deposited by cathodic arc evaporation is systematically investigated by correlating experiments and theory. Decreasing the nitrogen deposition pressure from 5.0 to 0.5 Pa results in an ion flux-enhancement by a factor of three and an increase of the average ion energy from 15 to 30 eV, caus-ing the stress-free lattice parameter to expand from 4.170 to 4.206 A, while the chemical composition of Ti0.27Al0.21N0.52 remains unchanged. The 0.9% lattice parameter increase is a consequence of formation of Frenkel pairs induced by ion bombardment, as revealed by density functional theory (DFT) simulations. The influence of the presence of Frenkel pairs on the thermal stability of metastable Ti0.27Al0.21N0.52 is investigated by scanning transmission electron microscopy, differential scanning calorimetry, atom probe tomography and in-situ synchrotron X-ray powder diffraction. It is demonstrated that the ion flux and ion energy induced formation of Frenkel pairs increases the thermal stability as the Al diffusion enabled crystallization of the wurtzite solid solution is retarded. This can be rationalized by DFT predictions since the presence of Frenkel pairs increases the activation energy for Al diffusion by up to 142%. Hence, the thermal stability enhancement is caused by a hitherto unreported mechanism -the Frenkel pair impeded Al mobility and thereby retarded formation of wurtzite solid solution. (C) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
ER -
HOLZAPFEL, Damian M, Denis MUSIC, Stanislav MRAZ, Soheil Karimi AGHDA, Martin ETTER, Pavel ONDRAČKA, Marcus HANS, Dimitri BOGDANOVSKI, Simon EVERTZ, Lena PATTERER, Paul SCHMIDT, Alexander SCHOKEL, Anders O ERIKSSON, Mirjam ARNDT, Daniel PRIMETZHOFER and Jochen M SCHNEIDER. Influence of ion irradiation-induced defects on phase formation and thermal stability of Ti0.27Al0.21 N (0.52) coatings. \textit{Acta Materialia}. OXFORD: Elsevier Ltd, 2022, vol.~237, 15 pp. ISSN~1359-6454. Available from: https://dx.doi.org/10.1016/j.actamat.2022.118160.
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