20.500.12556/RUL-175630 Mechanical properties, microstructure, and tribological performance of coated polyether-ketone-ketone (PEKK) polymer 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. coated PEKK friction wear coating adhesion CrN CrAlN prevlečen PEKK trenje obraba adhezija prevleke true false true Angleški jezik Slovenski jezik Članek v reviji 2025-11-06 12:25:08 2025-11-06 12:25:14 2026-07-08 14:34:09 0000-00-00 00:00:00 2025 0 0 11 str. art. 132872 Vol. 517 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.92 1879-3347 10.1016/j.surfcoat.2025.132872 256173571 RAZ_Al-Rjoub_Abbas_2025.pdf RAZ_Al-Rjoub_Abbas_2025.pdf 1 20C89600441CFED1AF05421786427851 4140887881e13cee9866d43e7043fb095e7b9716bd637274d6fc5f800cd4198a c44d40b5-bb03-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=221467 https://www.sciencedirect.com/science/article/pii/S0257897225011466 0 f2f58a6a-bb02-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=221466 Fakulteta za strojništvo 0 0 0