Fracture properties of α– and k–Al2O3 hard coatings deposited by chemical vapor deposition
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
Standard
in: Coatings, Jahrgang 11.2021, Nr. 11, 1359, 04.11.2021.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
Harvard
APA
Vancouver
Author
Bibtex - Download
}
RIS (suitable for import to EndNote) - Download
TY - JOUR
T1 - Fracture properties of α– and k–Al2O3 hard coatings deposited by chemical vapor deposition
AU - Konstantiniuk, Fabian
AU - Tkadletz, Michael
AU - Czettl, Christoph
AU - Schalk, Nina
N1 - Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/11/4
Y1 - 2021/11/4
N2 - Although α– and κ–Al 2 O 3 hard coatings deposited by chemical vapor deposition are well established in the metal-cutting industry for their ability to increase the performance and lifetime of cutting tools, the literature on their fracture properties is scarce. Thus, within this study, the mi-crostructure and mechanical properties of α– and κ–Al 2 O 3 coatings were investigated and compared to each other. X-ray diffraction and scanning electron microscopy combined with electron backscatter diffraction showed that both coatings exhibited a fiber texture, where the α–Al 2 O 3 coating displayed a (0001) texture and the κ–Al 2 O 3 coating a (001) texture with a certain (013) contribution. Higher hardness and Young’s modulus values of 31.0 ± 0.9 GPa and 474.6 ± 12.5 GPa, respectively, were ob-tained for the α–Al 2 O 3 coating, compared to 24.2 ± 0.8 GPa and 356.8 ± 7.9 GPa for κ–Al 2 O 3 . While the α–Al 2 O 3 coating exhibited a higher fracture stress of 8.1 ± 0.3 GPa (compared to 6.4 ± 0.6 GPa for κ–Al 2 O 3 ), the κ–Al 2 O 3 coating showed a higher fracture toughness of 4.4 ± 0.3 MPa*m 1/2 (compared to 3.2 ± 0.3 MPa*m 1/2 for alpha).
AB - Although α– and κ–Al 2 O 3 hard coatings deposited by chemical vapor deposition are well established in the metal-cutting industry for their ability to increase the performance and lifetime of cutting tools, the literature on their fracture properties is scarce. Thus, within this study, the mi-crostructure and mechanical properties of α– and κ–Al 2 O 3 coatings were investigated and compared to each other. X-ray diffraction and scanning electron microscopy combined with electron backscatter diffraction showed that both coatings exhibited a fiber texture, where the α–Al 2 O 3 coating displayed a (0001) texture and the κ–Al 2 O 3 coating a (001) texture with a certain (013) contribution. Higher hardness and Young’s modulus values of 31.0 ± 0.9 GPa and 474.6 ± 12.5 GPa, respectively, were ob-tained for the α–Al 2 O 3 coating, compared to 24.2 ± 0.8 GPa and 356.8 ± 7.9 GPa for κ–Al 2 O 3 . While the α–Al 2 O 3 coating exhibited a higher fracture stress of 8.1 ± 0.3 GPa (compared to 6.4 ± 0.6 GPa for κ–Al 2 O 3 ), the κ–Al 2 O 3 coating showed a higher fracture toughness of 4.4 ± 0.3 MPa*m 1/2 (compared to 3.2 ± 0.3 MPa*m 1/2 for alpha).
UR - http://www.scopus.com/inward/record.url?scp=85118974737&partnerID=8YFLogxK
U2 - 10.3390/coatings11111359
DO - 10.3390/coatings11111359
M3 - Article
VL - 11.2021
JO - Coatings
JF - Coatings
SN - 2079-6412
IS - 11
M1 - 1359
ER -