Characterization of hydroxyapatite-reduced graphene oxide nanocomposites consolidated via high frequency induction heat sintering method

An Investigation into the Relative Efficacy of High-Velocity Air-Fuel-Sprayed Hydroxyapatite Implants Based on the Crystallinity Index, Residual Stress, Wear, and In-Flight Powder Particle Behavior

“…From the FTIR studies, it could be noted that the peaks in the 1040–1125 cm –1 range, particularly ∼1094 and ∼1046 cm –1 , are associated with the asymmetric stretching of PO 4 –1 ions in the ν3 mode. The presence of a broad peak around 3400–3500 cm –1 (a peak stretch has been observed at 3425.02 and 3442.69 cm –1 , in powder and coating, respectively) confirms the presence of the hydroxyl group (−OH) stretching vibration of Ca 10 (PO 4 ) 6 (OH) 2 and HA . The identification of these groups is the fingerprint of the crystalline HA presence by the FTIR technique.…”

“…The presence of a broad peak around 3400−3500 cm −1 (a peak stretch has been observed at 3425.02 and 3442.69 cm −1 , in powder and coating, respectively) confirms the presence of the hydroxyl group (−OH) stretching vibration of Ca 10 (PO 4 ) 6 (OH) 2 and HA. 61 The identification of these groups is the fingerprint of the crystalline HA presence by the FTIR technique.…”

Bioactive surface modifications through thermally sprayed hydroxyapatite composite coatings: a review of selective reinforcements

“…Review load and stress transfer, interfacial bonding, inter-splat gluing and bridging, and pull-out effects. 13,182,207,275,317,319,320 Graphene's higher thermal conductivity (∼5300 W m −1 K −1 ) 306 as compared to HA (∼700 W m −1 K −1 ) 270 offers an adequate transfer of heat and load between the splats of the HA matrix. Graphene's higher surface area 231 further increases the extrinsic crack-tip shielding mechanisms, supplementing the strengthening and toughening mechanism.…”

“…Graphene's higher surface area 231 further increases the extrinsic crack-tip shielding mechanisms, supplementing the strengthening and toughening mechanism. 13,182,207,275,317,319,320 However, in cold spraying, toughening mechanisms might differ from the plasma spray, which needs to be investigated in the future.…”

“…The mechanisms offered were crack bridging, crack deflection, mechanical interlocking, load and stress transfer, interfacial bonding, inter-splat gluing and bridging, and pull-out effects. 13,182,207,275,317,319,320…”