<div class="csl-bib-body">
<div class="csl-entry">Glechner, T., Zauner, L., Hahn, R., Bahr, A. A. I., Wojcik, T., Ramm, J., Hunold, O., Polcik, P., & Riedl-Tragenreif, H. (2022, May 25). <i>Si alloyed transition metal diborides – A novel class of oxidation resistant coating materials</i> [Conference Presentation]. 48th International Conference on Metallurgical Coatings and Thin Films, ICMCTF, San Diego, CA, USA, United States of America (the). http://hdl.handle.net/20.500.12708/152915</div>
</div>
-
dc.identifier.uri
http://hdl.handle.net/20.500.12708/152915
-
dc.description.abstract
Surface protection of highly stressed components used in aviation or energy production is of great interest, especially to extend the operation ranges in oxidative high-temperature environments. Here, transition metal (TM) ceramics are a suitable class to resist such conditions. However, studies on a drastic improvement of the oxidation resistance of TM-diborides based coatings are relatively rare, as up to now many studies focus on the synthesis and mechanical properties of such films.
Therefore, within this study we suggest the combination of TM-boride based coating materials – as a high temperature stable ceramic – with the excellent oxide former Si, resulting in coatings with outstanding oxidation resistance, tested up to 1500 °C. Various TM-Si-B2±z (TM=Ti, Cr, Hf, Ta, W) films have been sputter deposited and subsequently oxidized in a DTA/TG setup to study their oxidation kinetics. Above certain Si contents, Ti-Si-B2±z, Cr-Si-B2±z, and Hf-Si-B2±z coatings exhibit strongly retarded oxidation kinetics obtaining kp values below 10-11 kg2m-4s-1 at 1100 °C. Long term oxidation tests at 1200 °C (up to 60 h in ambient air on hard substrates) confirmed the superior protective capability of these coatings, with i.e. Hf0.20Si0.23B0.57 possessing an oxide scale thickness of only 1.5 µm after 60 h. Along with a broad set of high-resolution characterization techniques (i.e. HR-TEM, APT) the study introduces this new class of hard coatings for oxidation protection at ultra-high temperatures.
-
dc.description.sponsorship
CDG Christian Doppler Forschungsgesellschaft
-
dc.language.iso
en
-
dc.subject
Oxidation Resistance
en
dc.subject
Transition Metal Ceramics
en
dc.subject
Thin Films
en
dc.subject
Borides
en
dc.subject
UHTC
en
dc.title
Si alloyed transition metal diborides – A novel class of oxidation resistant coating materials
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.contributor.affiliation
Oerlikon (Liechtenstein), Liechtenstein
-
dc.contributor.affiliation
Oerlikon (Liechtenstein), Liechtenstein
-
dc.contributor.affiliation
Plansee (Germany), Germany
-
dc.relation.grantno
CDL-SEC
-
dc.type.category
Conference Presentation
-
tuw.project.title
Oberflächentechnik von hochbeanspruchten Präzisionskomponenten
-
tuw.researchinfrastructure
Röntgenzentrum
-
tuw.researchinfrastructure
Universitäre Service-Einrichtung für Transmissionselektronenmikroskopie