Influence of the nano hydroxyapatite powder on thermally sprayed HA coatings onto stainless steel
| Autor: | Chamnan Randorn, Krai Kulpetchdara, Gobwute Rujijanagul, Komsanti Chokethawai, Apichart Limpichaipanit |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Scanning electron microscope Simulated body fluid 02 engineering and technology 01 natural sciences Indentation hardness law.invention chemistry.chemical_compound Powder coating law 0103 physical sciences Materials Chemistry Crystallization Thermal spraying Phosphoric acid 010302 applied physics Metallurgy technology industry and agriculture Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Surfaces Coatings and Films Chemical engineering chemistry 0210 nano-technology |
| Zdroj: | Surface and Coatings Technology. 306:181-186 |
| ISSN: | 0257-8972 |
| DOI: | 10.1016/j.surfcoat.2016.05.069 |
| Popis: | The nano Hydroxyapatite (HA) powder was derived from a novel peroxide-based route (PBR) using calcium nitrate, phosphoric acid and hydrogen peroxide as peroxo-precursor. In present work, the effect of nano HA powder on the microstructure and properties of thermally sprayed HA coatings was investigated. The obtained powders were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD pattern of hydroxyapatite powder corresponded to that of hydroxyapatite and tricalcium phosphate. The nano HA powder was then deposited onto stainless steel substrates using High Velocity Oxy-Fuel (HVOF) method. The influence of the crystallization was evaluated by XRD and SEM. Mechanical property in terms of hardness and bioactivity of the coatings were investigated by Vickers micro hardness testing and soaking in simulated body fluid (SBF), respectively. The results showed that the HA coatings were a mixture of amorphous and crystalline phase. The hardness value of 2.15 ± 0.08 GPa was obtained for the synthesized HA powder coating (SHAC). After soaking in SBF for 14 days, the layer formation of apatite could be observed. |
| Databáze: | OpenAIRE |
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