Fig. 10.

SEM images of nHA coated PETG and nHA coated PLA filament

a) nHA coated PETG filament: magnification 50×

white arrow points to one of several notches and nHA powder deposits

b) nHA coated PLA filament: magnification 50×

c) nHA coated PETG filament: magnification 250×

d) nHA coated PLA filament: magnification 250×

e) nHA coated PETG filament: magnification 500×

▲ points to smallest nHA particles with sizes of 200 nm

* points to agglomerated nHA particles with a size of 25 μm

f) nHA coated PLA filament: magnification 500×

g) nHA coated PETG filament: magnification 1,000×

h) nHA coated PLA filament: magnification 1,000×

▲ points to smallest nHA particles with sizes of 200 nm

* points to agglomerated nHA particles with a size of 7,5 μm.