Document Type : Original Reaearch Article
Authors
1 PhD candidate, Department of Materials and Metallurgical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
2 Associate Professor, Department of Materials and Metallurgical Engineering, Amirkabir University of Technology (Tehran Polytechnic),Tehran, Iran
3 Professor, Department of Nanotechnology and Advanced Materials, Materials and Energy Research Center, Karaj, Iran
Abstract
One of the new methods for determining the mechanical properties of thin layers and coatings is nanoindentation, which is of interest to a number of researchers. In this research, composite and graded coatings containing HA/Ti were deposited on Ti-6Al-4V substrate by mechanical coating technique and their cross-sectional structure was determined and compared using Scanning Electron Microscope (SEM). Their mechanical properties including elastic modulus and hardness were also studied through the nanoindentation method. The SEM results show that due to the presence of more hydroxyapatite particles on the top layer of the graded coating, its surface enjoys more smoothness and compactness and less porosity than the non-graded composite coating. According to the nanoindentation test results, the elastic modulus and hardness of the graded coating (modulus 36.6 ± 4.7 and hardness 0.94 GPa) is higher and more uniform than the composite coating (modulus 13.3 ± 8.5 and hardness 0.26 GPa). As illustrated in the SEM images of the cross-section of the coatings, this happens due to the greater porosity and roughness of the non-graded composite coating.
Keywords
- Mechanical Coating Technique (MCT)
- Hydroxyapatite (HA)
- Ti-6Al-4V Alloy
- Functionally Graded Coating (FGC)
- Nanoindentation
Main Subjects
- Barry, J. N., Twomey, B., Cowley, A., O'Neill, L., McNally, P. J., & Dowling, D. P. (2013). Evaluation and comparison of hydroxyapatite coatings deposited using both thermal and non-thermal techniques. Surface and Coatings Technology, 226, 82-91. https://doi.org/10.1016/j.surfcoat.2013.03.039
- Dey, A., Mukhopadhyay, A. K., Gangadharan, S., Sinha, M. K., Basu, D., & Bandyopadhyay, N. R. (2009). Nanoindentation study of microplasma sprayed hydroxyapatite coating. Ceramics International, 35(6), 2295-2304. https://doi.org/10.1016/j.ceramint.2009.01.002
- Doudkanlouy Milan, B., Mohammadzadeh, H., Jafari, R., & Soltani, M. (2022). Investigation of the Coating Methods and Types of Coatings Containing Hydroxyapatite for Applications in Tissue Engineering. Advanced Ceramics Progress, 8(4), 32-41. https://doi.org/30501/ACP.2022.365116.1108
- Ghadami, F., Saber-Samandari, S., & Rouhi, G. (2020). The Effects of Substrates' Materials on Hardness, Creep, and Residual Stress of the Hydroxyapatite Coating, Deposited by HVOF Method. In 2020 27th National and 5th International Iranian Conference on Biomedical Engineering (ICBME) (pp: 154-158), Tehran, Iran, . IEEE. https://doi.org/ 10.1109/ICBME51989.2020.9319455.
- Gross, K. A., Saber‐Samandari, S., & Heemann, K. S. (2010). Evaluation of commercial implants with nanoindentation defines future development needs for hydroxyapatite coatings. Journal of Biomedical Materials Research Part B: Applied Biomaterials: An Official Journal of The Society for Biomaterials, The Japanese Society for Biomaterials, and The Australian Society for Biomaterials and the Korean Society for Biomaterials, 93(1), 1-8. https://doi.org/10.1002/jbm.b.31537
- Hayashi, N., Ueno, S., Komarov, S. V., Kasai, E., & Oki, T. (2012). Fabrication of hydroxyapatite coatings by the ball impact process. Surface and Coatings Technology, 206(19-20), 3949-3954. https://doi.org/10.1016/j.surfcoat.2012.03.066
- Kreller, T., Sahm, F., Bader, R., Boccaccini, A. R., Jonitz-Heincke, A., & Detsch, R. (2021). Biomimetic calcium phosphate coatings for bioactivation of titanium implant surfaces: Methodological approach and in vitro evaluation of biocompatibility. Materials, 14(13), 3516. https://doi.org/10.3390/ma14133516
- McEntire, B., Bal, B. S., Rahaman, M., Chevalier, J., & Pezzotti, G. (2015). Ceramics and ceramic coatings in orthopaedics. Journal of the European Ceramic Society, 35(16), 4327-4369. https://doi.org/10.1016/j.jeurceramsoc.2015.07.034
- Ohtsu, N., Takahara, T., Hirano, M., & Arai, H. (2014). Effect of treatment temperature on the biocompatibility and mechanical strength of hydroxyapatite coating formed on titanium using calcium phosphate slurry. Surface and Coatings Technology, 239, 185-190. https://doi.org/10.1016/j.surfcoat.2013.11.038
- Romankov, S., Kaloshkin, S. D., Hayasaka, Y., Sagdoldina, Z., Komarov, S. V., Hayashi, N., & Kasai, E. (2009). Structural evolution of the Ti–Al coatings produced by mechanical alloying technique. Journal of Alloys and Compounds, 483(1-2), 386-388. https://doi.org/10.1016/j.jallcom.2008.07.199
- Romankov, S., Komarov, S. V., Vdovichenko, E., Hayasaka, Y., Hayashi, N., Kaloshkin, S. D., & Kasai, E. (2009). Fabrication of TiN coatings using mechanical milling techniques. International Journal of Refractory Metals and Hard Materials, 27(2), 492-497. https://doi.org/10.1016/j.ijrmhm.2008.10.005
- Saber-Samandari, S., & Gross, K. A. (2009). Nanoindentation reveals mechanical properties within thermally sprayed hydroxyapatite coatings. Surface and Coatings Technology, 203(12), 1660-1664. https://doi.org/10.1016/j.surfcoat.2008.12.025
- Savrai, R. A., & Morozova, A. N. (2021). A review of studies in the field of production of coatings on metals by means of mechanical alloying. Surfaces and Interfaces, 27, 101451. https://doi.org/10.1016/j.surfin.2021.101451
- Yazdani, A., & Isfahani, T. (2018). Hardness, wear resistance and bonding strength of nano structured functionally graded Ni-Al2O3 composite coatings fabricated by ball milling method. Advanced Powder Technology, 29(5), 1306-1316. https://doi.org/10.1016/j.apt.2018.02.025
- Zadorozhnyy, V. Y., Kaevitser, E., Kopylov, A. N., Borisova, Y. V., Sudarchikov, V. V., Khasenova, R. S., . . .& Kaloshkin, S. (2015). Synthesis of the hydroxyapatite coatings on the Ti substrates by mechanical alloying. Surface and Coatings Technology, 281, 157-163. https://doi.org/10.1016/j.surfcoat.2015.09.056
- Zadorozhnyy, V. Y., Shahzad, A., Pavlov, M. D., Kozak, D. S., Chirkov, A. M., Zagrebin, D. S., . .. Kaloshkin, S. D. (2017). Synthesis of the Ni-Al coatings on different metallic substrates by mechanical alloying and subsequent laser treatment. Journal of Alloys and Compounds, 707, 351-357. https://doi.org/10.1016/j.jallcom.2016.11.189
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