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 MSA  Vol.8 No.2 , February 2017
Synthesis of Co-Cr-Mo Fluorapatite Nano-Composite Coatings by Pulsed Laser Deposition for Dental Applications
Abstract: Aim: The study was to fabricate FA nanopowder/Co-Cr-Mo dental alloy nanocomposite using pulsed laser deposition (PLD), and to evaluate bioactivity properties on simulated body fluid. Methods: In this work, the FA nanopowder was prepared by mixing calcium hydroxide (Ca(OH)2), phosphorouspent oxide (P2O5) and calcium fluoride (CaF2) in a planetary high energy ball mill using zirconium vial. Fluorapatite (FA) nanopowder was processed in the form of pellet for pulsed laser deposition process. The Co-Cr-Mo alloy was coated with FA nanopowder which was approximately 35 - 65 nm at various laser energy, pressure and time. The X-ray diffraction (XRD) was used to analyze phase, crystallinity and size distribution of Co-Cr-Mo/FA nanocomposite. The surface analysis was by scanning electron microscopy (SEM), Atomic Force microscopy (AFM) and Energy dispersive spectroscopy (EDS). Results: From the results obtained, It was shown that FA nanopowder deposited on Co-Cr-Mo alloy was stable during 14 days of incubation on simulated body fluid. It was also observed that the FA nanopowder coated on the surface of the alloy was still intact after the deposition process, which indicated the bioactivity and biocompatibility of the material. Conclusions: The fabrication of FA nanocomposite based dental alloys (Co-Cr-Mo) using PLD was done successfully. This was confirmed by various characterization techniques, which included XRD, AFM, SEM and EDS.
Cite this paper: Khfagi, O. , Thovhogi, N. , Gihwala, D. , Maaza, M. and Mars, J. (2017) Synthesis of Co-Cr-Mo Fluorapatite Nano-Composite Coatings by Pulsed Laser Deposition for Dental Applications. Materials Sciences and Applications, 8, 135-152. doi: 10.4236/msa.2017.82009.
References

[1]   Galo, R., Rocha, L.A., Faria, C.A., Silveira, R.R., Ribeiro, R.F. and Chiarello de Mattos, M. (2014) Influence of the Casting Processing Route on the Corrosion Behavior of Dental Alloys. Materials Science and Engineering C, 45, 519-523.
https://doi.org/10.1016/j.msec.2014.10.006

[2]   Nuoh, T., Andre Mars, J., Thovhogi, N., Gihwala, D., Baleg, A.A. and Maaza, M. (2015) Influence of Temperature and pH on Corrosion Resistance of Ni-Cr and Co-Cr Dental Alloys on Oral Environment. Journal of Dental and Oral Health, 1, 5.

[3]   Hussain, S. (2009) Investigation of Structural and Optical Properties of Nanoceystalline Zn. M.Sc. Thesis, Available Online.

[4]   Postek, M.T.P., Howard, K.S., Johnson, A.T. and McMiche, K.L. (2001) Scanning Electron Microscopy. Ladd Research Industries, Williston.

[5]   Wang, X.Y., Rice, D.M., Lee, Y.S. and Downer, M.C. (1994) Time-Resolved Electron-Temperature Measurement in a Highly Excited Gold Target Using Femtosecond Thermionic Emission. Journal of Physical Review, 50, 8016.
https://doi.org/10.1103/PhysRevB.50.8016

[6]   Supady, J. (2010) Types of Tooth Filling Used in Dental Treatment in 19th Century. Journal of Stomatology, 63, 273-281.

[7]   Reimann, L. and Dobrzański, L.A. (2011) Microstructure and Hardness of Base Cobalt Alloys Used in Dentistry Engineering. In: Pacyna, J., Ed., Works of XXXIX Materials Engineering School. Monograph, Krakov-Krynica, Vol. 49, 198-202.

[8]   Powers, J.M. and Sakaguchi, R.L. (2006) Craig’s Restorative Dental Materials. 12th Edition, Mosby, Missouri, 386-393.

[9]   Ohtsuki, C., Aoki, Y., Kokubo, T., Bando, Y., Neo, M. and Nakamura, T. (1995) Transmission Electron Microscopic Observation of Glass-Ceramic A-W and Apatite Layer Formed on Its Surface in a Simulated Body Fluid. Journal of the Ceramic Society of Japan, 103, 449-454.
https://doi.org/10.2109/jcersj.103.449

[10]   Goodhew, P.J., Humpreys, T. and Branland, R. (2001) Electron Microscopy & Analysis. 3rd Edition, Taylor & Francis Group, New York.

[11]   Yamanaka, K., Mori, M. and Chiba, A. (2015) Surface Characterisation of Ni-Free Co-Cr-W-Based Dental Alloys Exposed to High Temperatures and the Effects of Adding Silicon. Corrosion Science, 94, 411-419.
https://doi.org/10.1016/j.corsci.2015.02.030

[12]   Kokubo, T. and Nan-Cryst, J. (1990) Surface Chemistry of Bioactive Glass-Ceramics. Journal of Nao-Crystalline Solids, 120, 138-151.
https://doi.org/10.1016/0022-3093(90)90199-V

[13]   Montero-Ocampo, C., Talavela, M. and Lopez, H. (1999) Effect of Alloy Preheating on the Mechanical Properties of As-Cast Co-Cr-Mo-C Alloys. Metallurgical and Material, 30, 611-620.
https://doi.org/10.1007/s11661-999-0052-6

[14]   Braic, M., Balaceanu, M., Vladescu, A., Kiss, A., Braic, V., Epurescu, G., Moldovan, A., Birjega, R. and Dinescu, M. (2007) Preparation and Characterization of Titanium Oxynitride Thin Films. Applied Surface Science, 253, 8210-8214.
https://doi.org/10.1016/j.apsusc.2007.02.179

[15]   Montero-Ocampo, C., Talavela, M. and Lopez, H. (1999) Effect of Alloy Preheating on the Mechanical Properties of As-Cast Co-Cr-Mo-C Alloys. Metallurgical and Materials Transactions A, 30, 611-620.
https://doi.org/10.1007/s11661-999-0052-6

 
 
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