EFFECT OF MULTI-WALLED CARBON NANOTUBES IN REINFORCED HYDROXYAPATITE COMPOSITE COATINGS FOR ORTHOPEDIC APPLICATIONS

Sachin Solanke, Sachin Shinde (), Dadarao Raut (), Ankit D. Oza (), Chander Prakash (), Kuldeep K. Saxena () and Sandeep Kumar ()
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Sachin Solanke: Department of Production Engineering, Veermata Jijabai Technological Institute (VJTI), Matunga, Mumbai 400 019
Sachin Shinde: ��Department of Mechanical Engineering, Data Meghe College of Engineering, Airoli, Navi Mumbai – Maharashtra, India 400 708
Dadarao Raut: Department of Production Engineering, Veermata Jijabai Technological Institute (VJTI), Matunga, Mumbai 400 019
Ankit D. Oza: �Department of Computer Sciences and Engineering, Institute of Advanced Research, Gandhinagar, Gujarat, 382426, India
Chander Prakash: �School of Mechanical Engineering, Shandong University of Technology, Zibo, P. R. China
Kuldeep K. Saxena: ��Department of Mechanical Engineering, GLA University, Mathura, U.P., 281 406, India
Sandeep Kumar: *Division of Research & Innovation, Uttaranchal University, Dehradun, Uttarakhand, 248007, India

Surface Review and Letters (SRL), 2025, vol. 32, issue 06, 1-12

Abstract: Hydroxyapatite (HA)-coated metallic substrates are commonly used for load-bearing orthopedic implants. In this work, Titanium grade 2 and Titanium grade 5 substrates were coated with hydroxyapatite and hydroxyapatite reinforced with 5% (by wt.) multiwalled carbon nanotubes (MCNT) separately using plasma spray coating. The wear behavior of these coated substrates was studied with the simulated body fluid (SBF) having a pH between 7.20 and 7.40. Fracture toughness and wear resistance of HA reinforced with 5% (by wt.) MCNT composite coating was found to be higher as compared to pure HA coating. This improvement is by virtue of inherent mechanical properties and the crack bridging effect offered by MCNT. The addition of MCNT also helped in restricting crack propagation in the coatings. As evident from SEM images, abrasive and adhesive wear mechanisms were observed which reduce greatly with the reinforcement of MCNT.

Keywords: Hydroxyapatite; Titanium grade 2; Titanium grade 5; plasma sprayed technique: nanoindentation; tribo-test (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1142/S0218625X23400097

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