3d Printer Filament > PEEK Family > Carbon Fiber PEEK. Exceptional mechanical, thermal, and chemical resistance properties make this an ideal material for the most demanding applications. In addition, printing defects such as pores also contributed to the reduced strength of the CFR-PEEK parts. PEEK Filament is one of the highest performance materials on the market. We indicate that poor interfacial bonding of the CF with the PEEK matrix is a primary reason for this reduced strength. Finally, the 3D-printed CFR-PEEK parts exhibited a tensile strength of 49 MPa, lesser than unfilled PEEK. The extrusion temperature, speed, and cooling rate played a major role in forming the uniform-diameter CFR-PEEK filaments. Interestingly, increasing the CF content above 10 vol% resulted in brittle filaments. Our results indicate that 400 rpm and 4 h were apt for developing uniform CFR-PEEK mixtures. Finally, the CFR-PEEK filaments were used in a high-temperature FFF setup to develop design-specific parts. We analyzed the effects of different extrusion parameters on the uniform-diameter CFR-PEEK filament quality to make it suitable for 3D printing. Next, we fed the CFR-PEEK milled powders into a high-temperature extrusion setup to develop uniform-diameter CFR-PEEK filaments. First, we developed homogeneous CFR-PEEK mixtures via ball milling and explored the effects of different milling durations and speeds on the extent of uniform dispersion of the CFs in the PEEK matrix. Hence, in the present study, we attempted to develop CF-reinforced PEEK (CFR-PEEK) parts via FFF. Carbon fiber (CF) reinforcement is a well-known method of mitigating the low mechanical properties of PEEK. ![]() Moreover, if the PEEK parts are developed by Fused Filament Fabrication (FFF)-based 3D Printing, there is a high chance of having PEEK parts with decreased mechanical properties. Poly-ether-ether-ketone (PEEK) has several approving mechanical properties however, for certain demanding applications such as automotive, PEEK does not exhibit the required strength.
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