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In situ synthesis of osteoconductive biphasic ceramic coatings on Ti6Al4V substrate by laser-microwave hybridization
- Source :
- Surface and Coatings Technology. 330:92-101
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Microwave heating is an efficient alternative approach for synthetic chemistry with many distinctive advantages of high heating rate, selective and homogeneous heating. In this study, a new laser-microwave hybridization method, which comprises laser micropatterning, microwave heating and in situ synthesis has been developed to produce titania/hydroxyapatite/tricalcium phosphate (TiO 2 /HA/TCP) composite coating on titanium alloy (Ti6Al4V) substrate. The composite coating with a fine porous network microarchitecture was selectively produced on the Ti6Al4V surface by laser ablation and alkaline treatment. Using TiO 2 sol-gel and mixed powders of calcium carbonate (CaCO 3 ) and dicalcium phosphate dihydrate (CaHPO 4 ·2H 2 O), the composite coating synthesized at a temperature of 800 °C in a short time of 20 min exhibited homogeneous microstructure, strong hydrophilicity and good adhesion strength of 34 MPa. The in vitro apatite-forming capability of the coating was examined by immersing the coated Ti6Al4V specimen into a simulated body fluid (SBF) for up to 7 days. Biodissolution was observed in the early stage of incubation, followed by apatite precipitation. The quantity and size of the apatite globules increased over time. After 7 days of immersion, the coating surface was nearly covered by a layer of bone-like apatite, showing a significant improvement of its osteoconductive property over the uncoated sample. The laser-microwave hybridization provides an efficient route to synthesize HA/TCP based coatings for bioactivity enhancement, and serves as an effective sterilization tool for implant materials.
- Subjects :
- Laser ablation
Materials science
Simulated body fluid
Titanium alloy
030206 dentistry
02 engineering and technology
Surfaces and Interfaces
General Chemistry
engineering.material
021001 nanoscience & nanotechnology
Condensed Matter Physics
Apatite
Surfaces, Coatings and Films
03 medical and health sciences
0302 clinical medicine
Coating
visual_art
Materials Chemistry
visual_art.visual_art_medium
engineering
Surface modification
Ceramic
Composite material
0210 nano-technology
Micropatterning
Subjects
Details
- ISSN :
- 02578972
- Volume :
- 330
- Database :
- OpenAIRE
- Journal :
- Surface and Coatings Technology
- Accession number :
- edsair.doi...........5464c4fa81aba4ad39ee4679040664fb