Influence of Ag additions on the structure, mechanical properties and oxidation behaviour of Cr-O coatings deposited by HiPIMS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F18%3A00328172" target="_blank" >RIV/68407700:21230/18:00328172 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.surfcoat.2018.02.025" target="_blank" >http://dx.doi.org/10.1016/j.surfcoat.2018.02.025</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.surfcoat.2018.02.025" target="_blank" >10.1016/j.surfcoat.2018.02.025</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of Ag additions on the structure, mechanical properties and oxidation behaviour of Cr-O coatings deposited by HiPIMS

Popis výsledku v původním jazyce

Here, we investigate the influence of Ag additions on the properties of Cr-O coatings deposited by magnetron sputtering. The deposition rate of Cr-O coating is 1.6 times higher than a single Cr coating, taken as reference, deposited with identical conditions. Incorporation of Ag in the Cr-O coating increases the deposition rate. Transition from a dominant columnar to a very compact morphology, as well as from crystalline to amorphous structure, was observed with the O addition. However, no morphological changes were observed with Ag additions. Annealing at temperature >= 500 degrees C promotes the crystallization of Cr-O and Cr-O-Ag coatings, i.e. the formation of a crystalline composite structure, formed by: Cr, Cr2O3 and Ag phases, the later in the case of Cr-O-Ag coatings. The increase of coatings crystallinity improved the mechanical properties. Thermogravimetric analysis showed that O and Ag additions to Cr have no influence on the onset point of oxidation. The oxidation kinetics of the Cr-based coatings is controlled by the outward diffusion of Cr ions through a top Cr2O3 layer. A dual oxide layer was formed for Cr-O and Cr-O-Ag coatings, when exposed to a continuous increase of the temperature up to 1200 degrees C. A compact layer of Cr2O3 grows on top of the coating, due to the Cr ions outwards diffusion, leaving behind a porous layer formed by Cr2O3 grains resulting from the recrystallization process, together with Ag agglomerates inside the empty porous zones.

Název v anglickém jazyce

Influence of Ag additions on the structure, mechanical properties and oxidation behaviour of Cr-O coatings deposited by HiPIMS

Popis výsledku anglicky

Here, we investigate the influence of Ag additions on the properties of Cr-O coatings deposited by magnetron sputtering. The deposition rate of Cr-O coating is 1.6 times higher than a single Cr coating, taken as reference, deposited with identical conditions. Incorporation of Ag in the Cr-O coating increases the deposition rate. Transition from a dominant columnar to a very compact morphology, as well as from crystalline to amorphous structure, was observed with the O addition. However, no morphological changes were observed with Ag additions. Annealing at temperature >= 500 degrees C promotes the crystallization of Cr-O and Cr-O-Ag coatings, i.e. the formation of a crystalline composite structure, formed by: Cr, Cr2O3 and Ag phases, the later in the case of Cr-O-Ag coatings. The increase of coatings crystallinity improved the mechanical properties. Thermogravimetric analysis showed that O and Ag additions to Cr have no influence on the onset point of oxidation. The oxidation kinetics of the Cr-based coatings is controlled by the outward diffusion of Cr ions through a top Cr2O3 layer. A dual oxide layer was formed for Cr-O and Cr-O-Ag coatings, when exposed to a continuous increase of the temperature up to 1200 degrees C. A compact layer of Cr2O3 grows on top of the coating, due to the Cr ions outwards diffusion, leaving behind a porous layer formed by Cr2O3 grains resulting from the recrystallization process, together with Ag agglomerates inside the empty porous zones.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Surface & Coatings Technology

ISSN

0257-8972

e-ISSN

—

Svazek periodika

339

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

167-180

Kód UT WoS článku

000428009300018

EID výsledku v databázi Scopus

2-s2.0-85041519146