Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

Effect of Graded Coating on the Nanoindentation Properties of HA/Ti Composite Coatings Synthesized by Mechanical Coating Technique on Ti-6Al-4V Substrate

Document Type : Original Reaearch Article

Authors
Mahmood Jalali Bidakhavidi 1
Hamid Omidvar 2
Ali Zamanian 3
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
10.30501/jamt.2023.412015.1288
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

Subjects

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Journal of Advanced Materials and Technologies
Volume 12, Issue 4
Winter 2024
Pages 38-47

  • Receive Date 22 August 2023
  • Revise Date 05 September 2023
  • Accept Date 18 September 2023