Synthesis of functionalized TiO2-loaded HAp-coating by ball-burnishing assisted electric discharge cladding process

• Published in: Materials letters 2021-10, Vol.301, p.130282, Article 130282
• Main Authors: Prakash, Chander, Wandra, Rahul, Singh, Sunpreet, Pramanik, Alokesh, Basak, Animesh, Aggarwal, Aditya, Yadaiah, N.
• Format: Article
• Language: English
• Subjects: Ball-burnishing assisted EDC; Bioactivity; Biomechanics; Biomedical engineering; Burnishing; Cladding; Corrosion; Corrosion fatigue; Corrosion resistance; Electric discharges; Fatigue; Fatigue strength; Hydroxyapatite; Industrial applications; Materials science; Surface hardness; Synthesis; Titanium base alloys; Titanium dioxide; Zirconium dioxide; β-Ti alloy
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2021.130282

[Display omitted] •Functionated TiO2-loaded HAp-layer was cladded by BB-EDC process.•BB-EDC induced plastic-deformation by burnishing-balls that produce dense surface.•BB-EDC cladded layer comprised TiO2-loaded HAp that offer excellent corrosion resistance.•The functionalized layer comprised deformed fine grains that offered high resistance to fatigue failure.•The TiO2-renforcement acted as protein absorber that promote cell attachment and growth. The aim of research work is to synthesis a dense and compact functionalized TiO2-loaded HAp-layer using ball-burnishing assisted electric discharge cladding (BB-EDC) process to improve the biomechanical performance of the β-Ti alloy. The EDC process developed a rich layer of TiO2-loaded HAp, and ZrO2 burnishing balls induced compressive force that plastically deformed the developed layer as a result fine-grain formed in the superficial zone near the top surface that increased biomechanical properties. A flat and dense 5–10 µm thick TiO2-loaded HAp layer was synthesized that possessed high surface hardness (848 Hv) as compared to the untreated surface (285 Hv). The BB-EDC treated surface offered better fatigue strength (490 MPa) and corrosion resistance (low Icor: 8.18 µA/cm2) as compared to the untreated alloy. The TiO2-loading in HAp coating acted as a protein absorber and promoted cell growth; thus, possessed excellent bioactivity compared to the untreated surface. In conclusion, the BB-EDC can be utilized as a surface engineering technique for biomedical and other industrial applications.