Synthesis and biodegradation evaluation of nano-Si and nano-Si/TiO2 coatings on biodegradable Mg-Ca alloy in simulated body fluid
In the present study, nano-Si and nano-Si/TiO2 composite coatings have been successfully synthesized on the surface of Mg-1 wt%Ca alloy by the physical vapor deposition (PVD) method. The surface morphology and compositions of the coated specimens were characterized by X-ray diffraction (XRD), Fourie...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Published: |
Elsevier
2014
|
| Subjects: |
| _version_ | 1796861331712770048 |
|---|---|
| author | Bakhsheshi Rad, Hamid Reza Hamzah, Esah Daroonparvar, Mohammadreza Kasiri-Asgarani, Masoud Medraj, Mamoun |
| author_facet | Bakhsheshi Rad, Hamid Reza Hamzah, Esah Daroonparvar, Mohammadreza Kasiri-Asgarani, Masoud Medraj, Mamoun |
| author_sort | Bakhsheshi Rad, Hamid Reza |
| collection | ePrints |
| description | In the present study, nano-Si and nano-Si/TiO2 composite coatings have been successfully synthesized on the surface of Mg-1 wt%Ca alloy by the physical vapor deposition (PVD) method. The surface morphology and compositions of the coated specimens were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), transmission election microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The results show the formation of thin and compact coating layers which homogeneously cover the surface of Mg alloy. Some micro-pores and micro-cracks were observed in the Si and Si/TiO2 films. It was also found that the Si and TiO2 nanoparticle had a spherical morphology with an average particle size of 30-40 nm and 70-80 nm, respectively. Electrochemical studies revealed that nano-Si/TiO2 coating offers a significant reduction in the corrosion rate (0.57 mm/year) compared to the Si coated (0.91 mm/year) and the uncoated alloys (6.21 nun/year) in simulated body fluid (SBF). Hydrogen evolution studies showed a lower degradation rate of nano-Si/TiO2 (1.57 mIkm(2)/day) than that of nano-Si coated alloy (2.22 ml/cm(2)/day). Immersion test showed that the nano-Si/TiO2 coating presented a greater nucleation site of hydroxyapatite (HA) than the uncoated sample. Thus nano-Si/TiO2 composite coating prepared by PVD on the Mg-Ca alloy is more appropriate for biomedical applications. |
| first_indexed | 2024-03-05T19:54:43Z |
| format | Article |
| id | utm.eprints-62764 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T19:54:43Z |
| publishDate | 2014 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | utm.eprints-627642017-06-07T07:44:59Z http://eprints.utm.my/62764/ Synthesis and biodegradation evaluation of nano-Si and nano-Si/TiO2 coatings on biodegradable Mg-Ca alloy in simulated body fluid Bakhsheshi Rad, Hamid Reza Hamzah, Esah Daroonparvar, Mohammadreza Kasiri-Asgarani, Masoud Medraj, Mamoun TJ Mechanical engineering and machinery In the present study, nano-Si and nano-Si/TiO2 composite coatings have been successfully synthesized on the surface of Mg-1 wt%Ca alloy by the physical vapor deposition (PVD) method. The surface morphology and compositions of the coated specimens were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), transmission election microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The results show the formation of thin and compact coating layers which homogeneously cover the surface of Mg alloy. Some micro-pores and micro-cracks were observed in the Si and Si/TiO2 films. It was also found that the Si and TiO2 nanoparticle had a spherical morphology with an average particle size of 30-40 nm and 70-80 nm, respectively. Electrochemical studies revealed that nano-Si/TiO2 coating offers a significant reduction in the corrosion rate (0.57 mm/year) compared to the Si coated (0.91 mm/year) and the uncoated alloys (6.21 nun/year) in simulated body fluid (SBF). Hydrogen evolution studies showed a lower degradation rate of nano-Si/TiO2 (1.57 mIkm(2)/day) than that of nano-Si coated alloy (2.22 ml/cm(2)/day). Immersion test showed that the nano-Si/TiO2 coating presented a greater nucleation site of hydroxyapatite (HA) than the uncoated sample. Thus nano-Si/TiO2 composite coating prepared by PVD on the Mg-Ca alloy is more appropriate for biomedical applications. Elsevier 2014 Article PeerReviewed Bakhsheshi Rad, Hamid Reza and Hamzah, Esah and Daroonparvar, Mohammadreza and Kasiri-Asgarani, Masoud and Medraj, Mamoun (2014) Synthesis and biodegradation evaluation of nano-Si and nano-Si/TiO2 coatings on biodegradable Mg-Ca alloy in simulated body fluid. Ceramics International, 40 (9PartA). pp. 14009-14018. ISSN 0272-8842 http://dx.doi.org/10.1016/j.ceramint.2014.05.126 DOI:10.1016/j.ceramint.2014.05.126 |
| spellingShingle | TJ Mechanical engineering and machinery Bakhsheshi Rad, Hamid Reza Hamzah, Esah Daroonparvar, Mohammadreza Kasiri-Asgarani, Masoud Medraj, Mamoun Synthesis and biodegradation evaluation of nano-Si and nano-Si/TiO2 coatings on biodegradable Mg-Ca alloy in simulated body fluid |
| title | Synthesis and biodegradation evaluation of nano-Si and nano-Si/TiO2 coatings on biodegradable Mg-Ca alloy in simulated body fluid |
| title_full | Synthesis and biodegradation evaluation of nano-Si and nano-Si/TiO2 coatings on biodegradable Mg-Ca alloy in simulated body fluid |
| title_fullStr | Synthesis and biodegradation evaluation of nano-Si and nano-Si/TiO2 coatings on biodegradable Mg-Ca alloy in simulated body fluid |
| title_full_unstemmed | Synthesis and biodegradation evaluation of nano-Si and nano-Si/TiO2 coatings on biodegradable Mg-Ca alloy in simulated body fluid |
| title_short | Synthesis and biodegradation evaluation of nano-Si and nano-Si/TiO2 coatings on biodegradable Mg-Ca alloy in simulated body fluid |
| title_sort | synthesis and biodegradation evaluation of nano si and nano si tio2 coatings on biodegradable mg ca alloy in simulated body fluid |
| topic | TJ Mechanical engineering and machinery |
| work_keys_str_mv | AT bakhsheshiradhamidreza synthesisandbiodegradationevaluationofnanosiandnanositio2coatingsonbiodegradablemgcaalloyinsimulatedbodyfluid AT hamzahesah synthesisandbiodegradationevaluationofnanosiandnanositio2coatingsonbiodegradablemgcaalloyinsimulatedbodyfluid AT daroonparvarmohammadreza synthesisandbiodegradationevaluationofnanosiandnanositio2coatingsonbiodegradablemgcaalloyinsimulatedbodyfluid AT kasiriasgaranimasoud synthesisandbiodegradationevaluationofnanosiandnanositio2coatingsonbiodegradablemgcaalloyinsimulatedbodyfluid AT medrajmamoun synthesisandbiodegradationevaluationofnanosiandnanositio2coatingsonbiodegradablemgcaalloyinsimulatedbodyfluid |