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Microstructural design of ceramics for bone regeneration
- Source :
- Journal of the European Ceramic Society, Journal of the European Ceramic Society, Elsevier, 2020, 40 (7), pp.2555-2565. ⟨10.1016/j.jeurceramsoc.2019.10.039⟩
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- International audience; Dense tricalcium phosphate, Ca3(PO4)2 (TCP) – diopside, CaMg(SiO3)2, composites present better mechanical properties than single phase TCP. In this work, it is investigated whether the mechanical behaviour improvement by diopside is maintained in porous scaffolds. The processing parameters to obtain cylinders with ≈ 50% of aligned pores of elliptical cross sections with major axis up to 100 μm by freeze casting and sintering were established. Pore channels were introduced in the green specimens by laser ablation. After sintering, the diameter of the cross sections of the channels was ≈ 700 μm. The ceramic composite microstructure was constituted by a substructure of small diopside particles (2 −7 μm) and dense β-TCP zones of larger dimensions (up to 40 μm). Strength values, determined by diametral compression (DCDT) (≈ 2.5–4 MPa) are in the range of strength of cancellous bone. Diopside presents transgranular fracture, hindering crack propagation from the β-TCP areas and the pores, as occurred in the dense materials
- Subjects :
- 010302 applied physics
Laser ablation
Diopside
Materials science
[SDV]Life Sciences [q-bio]
Sintering
Transgranular fracture
Fracture mechanics
02 engineering and technology
021001 nanoscience & nanotechnology
Microstructure
01 natural sciences
[SPI]Engineering Sciences [physics]
visual_art
0103 physical sciences
Materials Chemistry
Ceramics and Composites
visual_art.visual_art_medium
[CHIM]Chemical Sciences
Ceramic
Composite material
0210 nano-technology
Bone regeneration
Subjects
Details
- Language :
- English
- ISSN :
- 09552219
- Database :
- OpenAIRE
- Journal :
- Journal of the European Ceramic Society, Journal of the European Ceramic Society, Elsevier, 2020, 40 (7), pp.2555-2565. ⟨10.1016/j.jeurceramsoc.2019.10.039⟩
- Accession number :
- edsair.doi.dedup.....3d92c3ec434d203baa5e00305a2931de