Fretting wear mechanism of plasma-sprayed CNT-reinforced wollastonite-zirconia composite coatings for bioimplant applications
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F25%3A10002791" target="_blank" >RIV/47718684:_____/25:10002791 - isvavai.cz</a>
Výsledek na webu
<a href="https://doi.org/10.1016/j.triboint.2025.111249" target="_blank" >https://doi.org/10.1016/j.triboint.2025.111249</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.triboint.2025.111249" target="_blank" >10.1016/j.triboint.2025.111249</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Fretting wear mechanism of plasma-sprayed CNT-reinforced wollastonite-zirconia composite coatings for bioimplant applications
Popis výsledku v původním jazyce
This study investigates the fretting wear mechanisms of plasma-sprayed wollastonite-zirconia (CaSiO3-ZrO2, WaZr) composite coatings, both unreinforced and reinforced with carbon nanotubes (WaZr-CNT), for bioimplant applications. The developed coatings are compared with conventional hydroxyapatite (HA) coatings on titanium substrates. Microstructural analysis reveals that CNT reinforcement leads to a denser, more uniformly bonded WaZr-CNT coating through effective splat bridging and pore sealing. Mechanical characterization shows that WaZr-CNT coatings possess higher microhardness and lower elastic modulus than unreinforced WaZr coating.During fretting tests at a 200 µm displacement amplitude, the WaZr-CNT coating exhibited an approximately 83 % reduction in energy dissipation compared to HA coatings and a 75 % reduction compared to WaZr coatings, indicating significant improvement in fretting resistance. While HA and WaZr coatings underwent splat fracture and generated considerable amount of wear debris, the WaZr-CNT coating produced almost no debris and maintained intact splat boundaries. The novelty of this work lies in the development and evaluation of CNT-reinforced WaZr coatings that for the first time undergo fretting tests and demonstrate superior fretting wear resistance under cyclic sliding contact compared to unreinforced WaZr and conventional HA coatings.
Název v anglickém jazyce
Fretting wear mechanism of plasma-sprayed CNT-reinforced wollastonite-zirconia composite coatings for bioimplant applications
Popis výsledku anglicky
This study investigates the fretting wear mechanisms of plasma-sprayed wollastonite-zirconia (CaSiO3-ZrO2, WaZr) composite coatings, both unreinforced and reinforced with carbon nanotubes (WaZr-CNT), for bioimplant applications. The developed coatings are compared with conventional hydroxyapatite (HA) coatings on titanium substrates. Microstructural analysis reveals that CNT reinforcement leads to a denser, more uniformly bonded WaZr-CNT coating through effective splat bridging and pore sealing. Mechanical characterization shows that WaZr-CNT coatings possess higher microhardness and lower elastic modulus than unreinforced WaZr coating.During fretting tests at a 200 µm displacement amplitude, the WaZr-CNT coating exhibited an approximately 83 % reduction in energy dissipation compared to HA coatings and a 75 % reduction compared to WaZr coatings, indicating significant improvement in fretting resistance. While HA and WaZr coatings underwent splat fracture and generated considerable amount of wear debris, the WaZr-CNT coating produced almost no debris and maintained intact splat boundaries. The novelty of this work lies in the development and evaluation of CNT-reinforced WaZr coatings that for the first time undergo fretting tests and demonstrate superior fretting wear resistance under cyclic sliding contact compared to unreinforced WaZr and conventional HA coatings.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
20506 - Coating and films
Návaznosti výsledku
Projekt
<a href="/cs/project/EH23_021%2F0008594" target="_blank" >EH23_021/0008594: Evropská laboratoř aplikovaného výzkumu aditivních technologií žárového nástřiku</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2025
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Tribology International
ISSN
0301-679X
e-ISSN
—
Svazek periodika
2026/B/214
Číslo periodika v rámci svazku
February 2026
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
20
Strana od-do
nestránkováno
Kód UT WoS článku
001588137600001
EID výsledku v databázi Scopus
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