The effect of ion irradiation and elevated temperature on the microstructure and the properties of C/W/C/B multilayer coating

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F16%3A00239371" target="_blank" >RIV/68407700:21220/16:00239371 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0169433216000179" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0169433216000179</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apsusc.2016.01.003" target="_blank" >10.1016/j.apsusc.2016.01.003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of ion irradiation and elevated temperature on the microstructure and the properties of C/W/C/B multilayer coating

Popis výsledku v původním jazyce

C/W/C/B multi-layer PVD coating with a layer period of 10 nm and 500 nm in thickness was irradiated with 45 keV N ions at fluence of 1 x 1017 cm-2. Ion irradiation was performed at room temperature or at an elevated temperature of 500 °C. The microstructure was investigated by X-ray diffraction, by X-ray photoelectron spectroscopy, and by Raman spectroscopy. The results showed that implanted N ions bond both with W atoms and with C atoms. N ion irradiation induced the formation of WC and WC1-x phases. The energetic ions transformed the C bonds in defect sp2 and defect sp3 hybridizations, resulting in graphitization of the carbon fraction in the multilayer coating. Ion irradiation reduced the cohesive strength of the monolayers, reduced hardness of the C/W/C/B coating, increased its surface roughness and increased its friction coefficient. An elevated temperature during ion irradiation caused a better arrangement of the WC phase and further graphitization of the carbon fraction, in comparison with a coating treated by ion irradiation at room temperature. There is discussion of the causes of the observed changes in surface properties.

Název v anglickém jazyce

The effect of ion irradiation and elevated temperature on the microstructure and the properties of C/W/C/B multilayer coating

Popis výsledku anglicky

C/W/C/B multi-layer PVD coating with a layer period of 10 nm and 500 nm in thickness was irradiated with 45 keV N ions at fluence of 1 x 1017 cm-2. Ion irradiation was performed at room temperature or at an elevated temperature of 500 °C. The microstructure was investigated by X-ray diffraction, by X-ray photoelectron spectroscopy, and by Raman spectroscopy. The results showed that implanted N ions bond both with W atoms and with C atoms. N ion irradiation induced the formation of WC and WC1-x phases. The energetic ions transformed the C bonds in defect sp2 and defect sp3 hybridizations, resulting in graphitization of the carbon fraction in the multilayer coating. Ion irradiation reduced the cohesive strength of the monolayers, reduced hardness of the C/W/C/B coating, increased its surface roughness and increased its friction coefficient. An elevated temperature during ion irradiation caused a better arrangement of the WC phase and further graphitization of the carbon fraction, in comparison with a coating treated by ion irradiation at room temperature. There is discussion of the causes of the observed changes in surface properties.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JK - Koroze a povrchové úpravy materiálu

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Applied Surface Science

ISSN

0169-4332

e-ISSN

—

Svazek periodika

365

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

306-313

Kód UT WoS článku

000369960300040

EID výsledku v databázi Scopus

2-s2.0-84959568572