Carbon fiber reinforced PEEK

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Carbon fiber reinforced PEEK (also CF / PEEK or carbon fiber reinforced PEEK ) describes a fiber composite material that is created by embedding carbon fibers in a matrix made of polyetheretherketone (PEEK).

Manufacturing

Workpieces made of CF / PEEK are usually produced by hot pressing from fabric pre-impregnated with PEEK ( prepreg ) as the starting material. CF / PEEK can be machined using chip-removing processes as well as water jet cutting . To manufacture a thin-walled three-dimensional component, a flat CF / PEEK sheet is usually formed.

Material properties

CF / PEEK absorbs less moisture than CF- epoxy resin composite materials, has better fire behavior, and higher impact strength . In contrast to CF-epoxy resin composites, the impact strength increases with increasing temperature.

  • Operating temperature maximum 260 ° C
  • Radiolucent
  • good chemical resistance
  • good abrasion resistance

Differentiation from conventional fiber composite materials

The thermoplastic matrix offers the possibility of shaping by thermoforming . Conventional fiber composite materials, which usually have a thermosetting matrix (for example made of epoxy resin), cannot be processed by means of thermoforming. CF / PEEK offers a higher resistance to chemicals than conventional thermosetting carbon fiber composites and a continuous operating temperature of up to 250 ° C.

The advantage of CF / PEEK over pure, unreinforced PEEK lies in the significantly higher rigidity and strength of reinforced PEEK.

Areas of application for CF / PEEK are applications for which metals are out of the question due to the requirements for weight, low thermal expansion or X-ray permeability, for example, and conventional fiber composite materials are ruled out due to requirements for temperature resistance, strength, wear resistance, moisture absorption or fire behavior.

literature

  • Walter Krenkel: Composites: 17th Symposium on Composites and Material Compounds. Wiley-VCH 2009, ISBN 9783527326150
  • Hans-Peter Zepf: Fiber composites with a thermoplastic matrix. High-performance materials for efficient processing. , Expert-Verlag 1997, ISBN 3816913903 online
  • Kurt Moser: Fiber - plastic composite. Design and calculation bases. Springer 1997, ISBN 3540621040
  • Steven J. Hooper: Composite materials: testing and design. ASTM International 1997