Sintering behaviour of 45S5 bioactive glass

Powder bed generation in integrated modelling of additive layer manufacturing of orthopaedic implants

“…Figure 1 shows the observed influence of particle size on sintering temperature exhibiting Ushape curves. The phenomenon can be explained by some interaction effects between particle size and crystallisation during sintering [36,53].…”

The key Features expected from a Perfect Bioactive Glass –How Far we still are from an Ideal Composition?

“…It can be seen that the sintered rods of 45S5 Bioglass® are still too porous due to its poor sintering ability and early crystallization [9][10][11][12][13][14][15], leading to unsatisfactory compressive strengths values. In contrast, the compressive strength values of the scaffold fabricated from 70-Di-10FA-20TCP ( Figure 4b) were significantly higher in comparison to those reported for cancellous bone (212 MPa) [36][37][38].…”

“…Poor sintering ability and early crystallization [9][10][11][12][13][14][15] due to the close proximity between glass transition temperature (T g~5 50ºC) and the onset of crystallization (T c~6 10ºC) hindering densification and resulting in poor mechanical strength, a serious limitation for manufacturing highly porous scaffolds; c.…”

Effect of particle size on processing of bioactive glass powder for atmospheric plasma spraying

“…The sample was heated at 25 °C min -1 to a maximum temperature of 800 ºC, and the resulting material was quenched to avoid changes on cooling. XRD of this sample ( Figure 8) shows a sodium calcium silicate phase with combeite structure (Na 6 Ca 3 Si 6 O 18 ) as major phase and of a sodium calcium phosphate phase with rhenanite structure (NaCaPO 4 ) as minor phase [26][27][28]. The corundum peak corresponds to the substrate used.…”