Spheroidized Hydroxyapatite (HA) Powders Plasma Spraying of Combustion Flame

Plasma-sprayed CaTiSiO 5 ceramic coating on Ti-6Al-4V with excellent bonding strength, stability and cellular bioactivity

“…An important characteristic feature of a coated implant material is its sufficient bonding strength and chemical stability to maintain long-term functional loading. We showed that Ti-6Al-4V plasma-coated with sphene possessed a significantly higher bonding strength (33.2 MPa), compared with HAp-coated Ti-6Al-4V (5.9-24.5 MPa; Khor et al 1997Khor et al , 1998Tsui et al 1998;Zheng et al 2000;Kweh et al 2002) and the sol-gel sphene coating (17.4 MPa; Wu et al 2008aWu et al -c , 2008. There are two important reasons for the excellent bonding strength of sphene plasma coating.…”

Preparation and characterization of nano-sized hydroxyapatite powders produced in a radio frequency (rf) thermal plasma

“…The presence of TCP also contributed to the growth of new apatite layer. The fast dissolution of amorphous phase and TCP would increase the Ca 2+ and PO 4 3− in the SBF solution and thus result in the reprecipitate of calcium phosphate crystals. The formation of a layer of biologically active bone-like apatite on the surface of the nano-sized HA powders is an essential requirement for an artificial material to bond to living bone.…”

“…Hydroxyapatite (HA) has attracted a great deal of attention because its chemical composition is similar to that of natural bone tissues [1][2][3][4][5]. It promotes rapid bone growth and bonding between bony tissue and implant surfaces.…”

“…However, the poor mechanical properties of bulk HA ceramics have provided impetus to research in HA coatings on metallic substrates in order to maintain biocompatibility and to improve mechanical properties [6]. Thermal spraying is a widely used coating process to deposit HA powders onto a metallic substrate [3,4,7].…”

Effects of Different Hydroxyapatite Binders on Morphology, Ca/P Ratio and Hardness of Nd-YAG Laser Clad Coatings

“…In investigating the adhesive and bioactivity properties of HA and BG coatings, most previous studies have considered plasma spraying, [4][5][6] pulsed laser deposition (PLD), [7][8][9] or solgel coating [10][11][12] techniques. However, these methods generate a mechanical rather than metallurgical bonding between the coating and the substrate, and hence the bonding strength is relatively low.…”