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On the potential of polyetheretherketone matrix composites reinforced with ternary nanolaminates for tribological and biomedical applications
Author(s) -
Javaid Sabah,
Dey Maharshi,
Kaabouch Naima,
Gupta Surojit
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.49980
Subject(s) - peek , materials science , composite material , nucleation , crystallization , microstructure , ternary operation , scanning electron microscope , compatibilization , hot pressing , polymer , polymer blend , copolymer , chemical engineering , chemistry , organic chemistry , computer science , engineering , programming language
We report the synthesis and characterization of PEEK‐MAX (Ti 3 SiC 2 , Ti 3 AlC 2 , and Cr 2 AlC), and PEEK‐MoAlB composites by hot‐pressing. Detailed microstructure analysis by scanning electron microscopy showed that Ti 3 SiC 2 particles are well dispersed in the PEEK matrix after the addition of 5 vol% Ti 3 SiC 2 but at higher concentration (≥10 vol%), the Ti 3 SiC 2 particles segregated at the phase boundaries and formed interpenetrating micro‐networks. PEEK‐Ti 3 AlC 2 and PEEK‐MoAlB composites also showed similar structuring at the microstructural level. PEEK‐Cr 2 AlC composites showed a different behavior where Cr 2 AlC particles were well dispersed in the PEEK matrix. All the three PEEK‐MAX composites have lower hardness than PEEK‐MoAlB composites as MoAlB particulates are appreciably harder than MAX phases but were harder than PEEK. Due to heterogenous nucleation, the addition of MAX phases or MoAlB reduced the crystallization temperature ( T c ) by a few o C. The formation of imperfect crystals also resulted in the lowering of melting point ( T m ) of these composites. PEEK reinforced with 10 vol% Ti 3 SiC 2 , Ti 3 AlC 2 and MoAlB showed plastic failure, and had higher strength than PEEK. Comparatively, PEEK reinforced with 10 vol% Cr 2 AlC did not show any enhancement. All the PEEK‐MAX and PEEK‐MoAlB composites showed triboactive behavior and enhanced wear resistance.