Electrochemical deposition multi-walled carbon nanotube coatings on the surface of Ti6Al4V alloy for enhancing its biotribological properties

Evaluation of adhesion strength, corrosion, and biological properties of the MWCNT/TiO2 coating intended for medical applications

“… 24 Young's modulus increased from 115 to 135 MPa at 2 wt%, 22 and also from 70 to 400 MPa. 37 The deposition of MWNCTs on titanium caused about a 10% decrease under dry conditions, but even a 90% decrease in SBF (simulated body fluid), 14 and a moderate change in wear volume from 14.14 × 10 6 to 10.6 × 10 6 mm 3 was found after adding CNTs to TiO 2 in the sprayed-made coating. 32 A decreasing current density was noticed for the CNT–Hap coating from 0.54 to 0.05 μA cm −2 at 1 wt% CNTs.…”

“…10 CNTs have seldom been proposed as coating components and exceptionally as single layers. Recently, such implementations have resulted in abrasion-resistant, photothermal, and superhydrophobic anti-icing coatings, [11][12][13][14] anticorrosion and mechanically resistant coatings, [15][16][17][18] antifouling coating, 19 and coatings designed especially for heat exchangers and microwaves. 20,21 CNT-based coatings deposited on titanium and its alloys, including NiTi, are infrequent and highly diversied.…”

“…The carboxylic multi-wall carbon nanotube (MWCNT) coating on Ti alloy with CNT content from 0.05 to 0.2 wt% was designed to decrease friction and wear rates. 14 The most popular ones are hydroxyapatite (HAp) coatings reinforced with CNTs in amounts of up to 2 wt% 22 or 0.01 to 0.1 wt%, 23 which are expected to increase hardness and adhesion strength. The HAp–Ti coatings doped with 1 wt% of MWCNTs on NiTi alloy 24 and (Ce, Sr)HAp–agar–chitosan–MWCNTs (an amount unknown) on Ti 25 were proposed for their better hardness, adhesion, and biological behavior.…”