Mechanical properties, microstructure, and tribological performance of coated polyether-ketone-ketone (PEKK) polymer

Al-Rjoub, Abbas (avtor), Yaqub, Talha Bin (avtor), Nadeem, Irfan (avtor), Cavaleiro, Albano (avtor), Kalin, Mitjan (avtor), Emami, Nazanin (avtor)

This study investigates the mechanical properties, microstructure, and tribological performance of CrN and CrAlN coatings. The coatings were deposited by low power DC reactive magnetron sputtering (PVD) on semicrystalline polyether-ketone-ketone (PEKK) substrates. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) confirmed PEKK's thermal stability, with a glass transition temperature of 158.0 °C and a melting point of 309.1 °C, ensuring compatibility with low-temperature coating processes. Microstructural analysis revealed dense, columnar coatings, with CrAlN exhibiting finer grains but minor interfacial voids/cracks that unaffected its adhesion. Tribological tests against stainless steel balls (SS) showed that CrN outperformed CrAlN, reducing the coefficient of friction (COF) by 39 % and specific wear volume by 78 % compared to uncoated PEKK, owing to its higher hardness and the formation of a protective Cr-oxides tribolayer. These results establish CrN as the superior coating for enhancing PEKK's durability and tribological performance, highlighting its potential for applications demanding high durability and wear resistance.

• Jezik: Angleški jezik
• Ključne besede: coated PEKK, friction, wear, coating adhesion
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 11 str.
• Številčenje: Vol. 517, [article no.] 132872
• PID: 20.500.12556/RUL-175630
• UDK: 539.92
• ISSN pri članku: 1879-3347
• DOI: 10.1016/j.surfcoat.2025.132872
• COBISS.SI-ID: 256173571
• Datum objave v RUL: 06.11.2025

Gradivo je del revije

• Naslov: Surface & coatings technology
• Založnik: Elsevier
• ISSN: 1879-3347
• COBISS.SI-ID: 23035397

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: prevlečen PEKK, trenje, obraba, adhezija prevleke

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P2-0231
• Naslov: Tribologija

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Program financ.: Slovenian Research and Innovation Agency
• Številka projekta: MSCA-COFUND-5100-237
• Naslov: /