Mechanical and tribological properties of carbon fiber‐reinforced polyetheretherketone composite coatings by flame‐spraying method

Abstract

The carbon fiber-reinforced polyetheretherketone (CF/PEEK) composite coatings with two types of short CFs, that is, 300-and 600-mesh, each in the contents of 10 and 30 wt% are deposited in comparison with the pure PEEK coatings by using a flame spraying method, respectively. The 300-mesh CFs with intact morphology and the 600-mesh CFs preserving fractured shape and higher graphitization degree are selected as the reinforced fillers in the CF/PEEK composite coatings. The flame-sprayed CF/PEEK composite coatings show the increased porosity with the higher CF contents. The adding of CFs in the flame-sprayed CF/PEEK composite coatings limits the thermal degradation of PEEK and restrains the PEEK crystallization showing low crystallinity degree and small crystallite size. The composite coatings in 10 wt % CF content exhibit the optimized nanoindentation behavior and tribological property. The 300-mesh CFs with large length and intact morphology in flame-sprayed CF/PEEK composite coatings lead to the increased surface hardness by 1.31 times over that of the pure PEEK coatings. The 600-mesh CFs with higher graphitization degree contribute to better tribological property of flame-sprayed CF/PEEK composite coatings with an order of magnitude lower specific wear rate.

Synergistic enhancement of interfacial adhesion for CF/PEEK composites through carbene chemistry and water‐based self‐catalyzed cross‐linkable PENK‐NH2 sizing agent

“…Carbon fiber (CF) composites have garnered significant attention as promising materials owing to their exceptional strength-to-weight ratio, corrosion resistance, and minimal thermal expansion. [1][2][3][4][5] These properties make them highly suitable for cutting-edge fields, such as aerospace, medical, and military sectors. Accordingly, extensive research efforts have focused on developing high-performance CF composites with various matrices.…”

Tribological performance of WS2/PAI composite coating reinforced with carbon nanotubes‐carbon fiber at high temperatures

“…Carbon fiber (CF), known for its exceptional mechanical and thermal properties, is the commonly used reinforcing material. [12][13][14] At high temperatures, CF can undergo graphitization and form a transfer film, improving the high-temperature tribological performance of the coatings. 15,16 However, the weak interfacial bonding between CF and the coating material limits the reinforcing effect of CF.…”

“…into the coatings to enhance their high‐temperature tribological performance. Carbon fiber (CF), known for its exceptional mechanical and thermal properties, is the commonly used reinforcing material 12–14 . At high temperatures, CF can undergo graphitization and form a transfer film, improving the high‐temperature tribological performance of the coatings 15,16 .…”

Interfacial strengthening and processing of carbon fibers reinforced poly(ether‐ether‐ketone) composites: A mini‐review

“…16 Additionally, the melt viscosity of PEEK is large (up to 350 PaÁs at 400 C), and CF has the smooth surface and strong chemical inertness, resulting in poor interfacial interaction between PEEK matrix and CF. 17,18 To solve the above problems, researchers start from the surface functionalization modification of CF, the design and synthesis of interfacial compatibilizer for CF/PEEK composites, and the corresponding advanced additive manufacturing technology. Furthermore, the structure-function relationships between "surface microstructure of CF-interfacial interaction between PEEK matrix and CF-molding process and macroscopic properties of final CF/PEEK composites" are discussed to realize the efficient preparation of highperformance composites.…”

“…Due to the high melt viscosity of PEEK, it is difficult for PEEK matrix to infiltrate CF, which seriously affects the mechanical properties of CF/PEEK composites and limits their wide applications to a certain extent 16 . Additionally, the melt viscosity of PEEK is large (up to 350 Pa·s at 400°C), and CF has the smooth surface and strong chemical inertness, resulting in poor interfacial interaction between PEEK matrix and CF 17,18 . To solve the above problems, researchers start from the surface functionalization modification of CF, the design and synthesis of interfacial compatibilizer for CF/PEEK composites, and the corresponding advanced additive manufacturing technology.…”