Spark Plasma Sintering of Load-Bearing Iron–Carbon Nanotube-Tricalcium Phosphate CerMets for Orthopaedic Applications
| Autor: | Jozef Kaiser, Miroslava Horynová, Edgar B. Montufar, Mariano Casas-Luna, Ladislav Čelko, Zdenka Fohlerova, Lenka Klakurková, Sebastian Diaz-de-la-Torre, Zdenek Spotz, Tomáš Zikmund, Guillermo Diéguez-Trejo, Karel Dvorak |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
General Engineering Sintering chemistry.chemical_element Spark plasma sintering 02 engineering and technology Cermet 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences 0104 chemical sciences Iron powder chemistry visual_art Ultimate tensile strength visual_art.visual_art_medium General Materials Science Ceramic Composite material 0210 nano-technology Titanium |
| Zdroj: | JOM. 68:1134-1142 |
| ISSN: | 1543-1851 1047-4838 |
| DOI: | 10.1007/s11837-015-1806-9 |
| Popis: | Recently, ceramic–metallic composite materials (CerMets) have been investigated for orthopaedic applications with promising results. This first generation of bio-CerMets combine the bioactivity of hydroxyapatite with the mechanical stability of titanium to fabricate bioactive, tough and biomechanically more biocompatible osteosynthetic devices. Nonetheless, these first CerMets are not biodegradable materials and a second surgery is required to remove the implant after bone healing. The present work aims to develop the next generation bio-CerMets, which are potential biodegradable materials. The process to produce the new biodegradable CerMet consisted of mixing powder of soluble and osteoconductive alpha tricalcium phosphate with biocompatible and biodegradable iron with consolidation through spark plasma sintering (SPS). The microstructure, composition and mechanical strength of the new CerMet were studied by metallography, x-ray diffraction and diametral tensile strength tests, respectively. The results show that SPS produces CerMet with higher mechanical performance (120 MPa) than the ceramic component alone (29 MPa) and similar mechanical strength to the pure metallic component (129 MPa). Nonetheless, although a short sintering time (10 min) was used, partial transformation of the alpha tricalcium phosphate into its allotropic and slightly less soluble beta phase was observed. Cell adhesion tests show that osteoblasts are able to attach to the CerMet surface, presenting spread morphology regardless of the component of the material with which they are in contact. However, the degradation process restricted to the small volume of the cell culture well quickly reduces the osteoblast viability. |
| Databáze: | OpenAIRE |
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