Fabrication and properties of high performance PEEK/Si₃N₄ nanocomposites

Abstract

The crystallization, morphology, microhardness, scratch hardness, dynamic modulus, and wear behavior of high performance poly(ether-ether-ketone) (PEEK) matrix nanocomposites reinforced with 0 to 30 wt % silicon nitride (Si 3 N 4 ) nanoparticles were reported. The crystallinity of PEEK nanocomposites increases at 2.5 wt % Si 3 N 4 but, thereafter it decreases with increasing Si 3 N 4 content due to the hindrance to the ordering of PEEK chains. The crystallization peak temperature and crystallization onset temperature increases by 14 C for 10 wt % nanocomposite. The melting temperature does not vary significantly with Si 3 N 4 content. SEM shows almost uniform distribution of Si 3 N 4 in the PEEK matrix. The Vickers microhardness and scratch hardness increases significantly up to 10 wt % Si 3 N 4 content.The dynamic modulus of nanocomposites increases below and above T g of PEEK. The specific wear rate of nanocomposites with 2.5 wt % Si 3 N 4 is reduced significantly and it is lowest at 10 wt % Si 3 N 4 . However, the coefficient of friction of nanocomposites is more than that of pure PEEK.

Study on high‐performance poly(etheretherketone)/Si3N4 nanocomposites: New electronic substrate materials

“…This is due to slow heating rate (3°C/min) used in this study in contrast to the reported one (5°C/min), which causes higher expansion to matrix in a given time. Second, weak reduction in CTE with increasing Si 3 N 4 content may be attributed to decreasing crystallinity of PEEK fraction in nanocomposites as confirmed from XRD and differential scanning calorimetry [28]. Nevertheless, it is interesting to note that the commercial Polyclad's product PCL‐FR‐226/240 laminate (epoxy/E‐glass) exhibits CTE of 50 × 10 −6 /°C.…”

On the Future Design of Bio‐Inspired Polyetheretherketone Dental Implants

“…One prominent group comprises the carbon fiber reinforced PEEK (CFR PEEK) composites, which are already known for a long time due to their versatility, compatibility with modern imaging technologies, adjustable mechanical properties, and biocompatibility . Other potential composites with PEEK include carbon nanotubes (CNTs); TiO 2 ‐; ZrO 2 ‐; Al 2 O 3 ‐; Si 3 N 4 ‐; ZnO‐; SiO 2 ‐; SiC‐; calcium silicate nanoparticles; bioglass; combinations of soft‐hard nanoparticles, such as Bi 2 O 3 ‐SiO 2 , CuO‐SiO 2 , or WS 2 ‐SiC; polymer blends; or mixtures of the aforementioned . These composite materials did not only demonstrate significantly improved mechanical properties but also a better in vitro biocompatibility when compared to pure PEEK.…”

Tribological Performances of Thermosetting Polyimide Matched with Steel and Ceramic

“…Even though polymer composites reinforced with ceramic materials 11, 18 have been studied 4 early, with the practical requirement, it is necessary to develop such an investigation on tribological properties of polymer (especially PI) mated with ceramic materials. Besides, due to the application of bearing of polymer in industry, it is necessary to study the tribological properties of PI-ceramic pairs.…”