Influence of substrate metal alloy type on the properties of hydroxyapatite coatings deposited using a novel ambient temperature deposition technique

Abstract

In addition to titanium grade 5, both cobalt chromium and stainless steel 316 were investigated. In this study HA coatings were deposited using both the CoBlast and plasma sprayed techniques, and the resultant HA coating and substrate properties were evaluated and compared. The CoBlast deposited HA coatings were found to present similar surface morphologies, interfacial properties and composition irrespective of the substrate alloy type. Coating thickness however displayed some variation with the substrate alloy, ranging from 2.0 to 3.0 μm.This perhaps is associated with the electro-negativity of the metal alloys. The APS treated samples exhibited evidence of both coating, and significantly, substrate phase alterations for two metal alloys; titanium grade 5 and cobalt chrome. Conversely, the CoBlast processed samples exhibited no phase changes to the substrates after depositions. The APS alterations were attributed to the brief, but high intensity temperatures experienced during processing.

Calcium orthophosphate deposits: Preparation, properties and biomedical applications

“…In addition, the coated substrates showed promising results in vivo [589,590,592]. Similar results were obtained for the CoBlast TM process [592][593][594][595][596][597]. In addition, there is a shot peening deposition, which differs from the CoBlast TM process just by the nature of the blast medium (silica is used in shot peening, while alumina is used in CoBlast TM ) [598].…”

“…Therefore, an idea appeared to use this property to deposit CaPO 4 on metallic (Ti and its alloys) substrates [589][590][591][592][593][594][595][596][597]. The process was performed at room temperature using a sandblaster and either a HA powder only [589,590,592], or a mixture of a HA powder with a blast medium (a CoBlast TM process developed by ENBIO, Dublin, Ireland) [592][593][594][595][596][597].…”

“…The process was performed at room temperature using a sandblaster and either a HA powder only [589,590,592], or a mixture of a HA powder with a blast medium (a CoBlast TM process developed by ENBIO, Dublin, Ireland) [592][593][594][595][596][597]. In addition, blast coating can be performed by a composite ceramic consisting of an alumina core (a carrier material) covered with a porous HA shell [591].…”

Physico-Chemical Properties and In Vitro Antifungal Evaluation of Samarium Doped Hydroxyapatite Coatings

“…Also Jouanny et al [65] reported that between the TiO 2 thin films deposited on the Si and Ti-6Al-4V substrate respectively, are differences from mechanical point of view. According to the studies reported by Barry et al [66] the nature of the substrate could influence the surface roughness and coating thickness but there are no significant differences between the interface properties and the coating composition depending on the type of alloy. Moreover, Ferraris et al [67] reported that the substrate also influences the biological properties of the samples.…”

Promotion of bone regeneration on titanium implants through a chemical treatment process using calcium phosphate slurry: Microscopic analysis, cellular response, and animal experiment

“…However, serious drawbacks such as diffusion, fracturing, delamination from the base material caused by the thickness of the film and the difference of the coefficients of thermal expansion between the film of HAp and its substrate have been reported. 8,15,16 The thickness of commercially available plasma-spray coating is generally at least several tens of micrometers, and it is difficult to prepare a homogeneous HAp film in the nanometer range. 17 Therefore, many researchers have attempted to find an adequate material that can be made into a thin, dense film for surface treatment.…”