Mechanical performance of laser sintered poly(ether ketone ketone) (PEKK) Conference

Benedetti, L, Brulé, B, Decraemer, N et al. (2019). Mechanical performance of laser sintered poly(ether ketone ketone) (PEKK) . 721-734.

cited authors

  • Benedetti, L; Brulé, B; Decraemer, N; Davies, R; Evans, K; Ghita, O

abstract

  • The recent progress in Additive Manufacturing Powder Bed Fusion systems are bound to attract uptake of new high performance materials. Within the Poly(aryl ether ketone) (PAEK) family, Poly(ether ketone ketone) (PEKK) shows promising mechanical properties, comparable with the commercial laser sintering grade PEK HP3, whilst processed at significantly lower temperatures. Kepstan 6002 PEKK specimens were laser sintered in multiple orientations and a range of mechanical tests were used to assess overall performance. PEKK showed outstanding ultimate tensile strength ranging between 75 and 90 MPa in x-y direction whilst maintaining an elongation at break of 2.6%. Further investigation of the fracture showed localized plastic regions attributed to a better performance. The same plastic behaviour is observed during compression, in which PEKK showed remarkable deformation with no signs of breaking. The combination of properties offered by Kepstan PEKK parts manufactured at a lower processing temperature makes it a very attractive polymer for applications in the aerospace and automotive sectors.

publication date

  • January 1, 2019

start page

  • 721

end page

  • 734