Young's modulus of carbon from self-adhesive carbon grain of oil palm bunches

The Young's moduli of carbon pellets prepared from pre-carbonized oil pal empty fruit bunches were measured before and after carbonization. The ultrasonic measurements on the samples showed that the elastic modulus after carbonization in the radial and tangential directions was approximately 1.3 to 1.7 times higher and 0.8 times smaller in the axial direction than that before carbonization. This contradictory trend was interpreted as being caused by the fact that in the former directions, the structure became more monolithic after carbonization, which cannot be said on the latter direction.