High temperature fracture toughness of single-layer CrAlN and CrAlSiN hard coatings

Aljaz Drnovsek; Hi Vo; Marisa Rebelo de Figueiredo; Szilárd Kolozsvári; Peter Hosemann; Robert Franz

doi:10.1016/j.surfcoat.2021.126909

High temperature fracture toughness of single-layer CrAlN and CrAlSiN hard coatings

Aljaz Drnovsek
, Hi Vo
, Marisa Rebelo de Figueiredo
, Szilárd Kolozsvári
, Peter Hosemann
, Robert Franz

Lehrstuhl für Funktionale Werkstoffe und Werkstoffsysteme (425)

University of California, Berkeley
Plansee Composite Materials GmbH, Lechbruck
Jožef Stefan Institute, Ljubljana
Lawrence Berkeley National Laboratory

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Begutachtung

1 Zitat (Scopus)

Abstract

Hardness and toughness are among of the most important physical properties of hard coatings and it is important to analyze them at temperatures present during coating applications. CrAlN and CrAlSiN are hard coating materials frequently used in high temperature applications. While both possess high oxidation resistance and thermal stability, they differ in their microstructure. In this work, the fracture toughness of magnetron-sputtered single-layer CrAlN and CrAlSiN hard coatings was determined up to 700 °C by in-situ scanning electron microscopy micro-cantilever deflection tests. The results show a decreasing trend of the fracture toughness with increasing temperature. While both coatings' fracture toughness trends are similar up to 400 °C, they diverge at higher temperatures. In general, the evolution of the fracture toughness with increasing temperature shows similarities to the observed changes in hardness in the same temperature range.

Originalsprache	Englisch
Aufsatznummer	126909
Seitenumfang	7
Fachzeitschrift	Surface & coatings technology
Jahrgang	409.2021
Ausgabenummer	15 March
Frühes Online-Datum	29 Jan. 2021
DOIs	https://doi.org/10.1016/j.surfcoat.2021.126909
Publikationsstatus	Veröffentlicht - 15 März 2021

Bibliographische Notiz

Funding Information:
The authors are grateful to Sabrina Hirn (Montanuniversität Leoben, Austria) for her support in synthesis and characterization of the coatings. We acknowledge the CENN Nanocenter (Ljubljana, Slovenia) for the use of FIB and also the financial support by the Österreichische Forschungsförderungsgesellschaft mbH within the framework of the project HT-WEAR-RESISTANCE (project number 846510 ) and we acknowledge the DOE-NEUP program DE-NE 00008767, and 00008768 the Department of Energy National Nuclear Security Administration through the Nuclear Science and Security Consortium student support under Award Number DE-NA0003180.

Publisher Copyright:
© 2021 Elsevier B.V.

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abstract = "Hardness and toughness are among of the most important physical properties of hard coatings and it is important to analyze them at temperatures present during coating applications. CrAlN and CrAlSiN are hard coating materials frequently used in high temperature applications. While both possess high oxidation resistance and thermal stability, they differ in their microstructure. In this work, the fracture toughness of magnetron-sputtered single-layer CrAlN and CrAlSiN hard coatings was determined up to 700 °C by in-situ scanning electron microscopy micro-cantilever deflection tests. The results show a decreasing trend of the fracture toughness with increasing temperature. While both coatings' fracture toughness trends are similar up to 400 °C, they diverge at higher temperatures. In general, the evolution of the fracture toughness with increasing temperature shows similarities to the observed changes in hardness in the same temperature range.",

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AU - Kolozsvári, Szilárd

AU - Hosemann, Peter

AU - Franz, Robert

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