Morphology of calcium phosphate coatings deposited on a Ti–6Al–4V substrate by an electrolytic method under 80Torr

Wang, Szu-Hao; Shih, Wei-Jen; Li, Wang-Long; Hon, Min–Hsiung; Wang, Moo–Chin

doi:10.1016/j.jeurceramsoc.2004.08.016

Cited by 49 publications

(37 citation statements)

References 25 publications

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“…HA has been clinically applied as a dense, sintered material and as a coating for bioinert metallic implant [6]. Other biologically relevant calcium phosphates, (Ca-P), involve amorphous calcium phosphate (ACP), brushite (DCPD), monetite (MCP), octacalcium phosphate (OCP), calcium pyrophosphate, and tricalcium phosphate ( -TCP), ( -TCP) and tetracalcium phosphate [7]. Nevertheless, biological apatites, whose B-type carbonate substitution, are nanostructured, comprising unique chemical, physical and electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Sr+2 and Zn+2 Incorporation in the Biomimetic Coating of a Prosthetic Alloy

Abdel-Fattah¹,

El-Sayed²,

Talaat³

et al. 2011

Open Biomat J

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Abstract:The next great wave of innovation and development for implantable medical devices focuses on surface engineering. This would enhance their performance, restore lost functions and ultimately reduce pain. Biomimetic coating is a promising approach, used in that concern. In the present work, an attempt was made to develop the function of the biomimetic coating rather than the classical biocompatibility. Corrected simulated body fluid, leading the conventional fluid concentration by one half, 1.5 c-SBF, was prepared with adequate supplement of Sr +2 , or Zn +2 according to the permissible therapeutic doses, 0.5 mM. The selection of Sr +2 and Zn +2 as additives was owing to their anti-osteoporotic and antimicrobial/bacterial activity respectively. The bioinert discs of titanium aluminum vanadium alloy, Ti-6Al-4V, were pretreated according to our previously developed protocol [Alaa Adawy et al. 2009, Biomimetic Coating of Precalcified Ti-6Al-4V Alloy, J. Open Medical Devices, 1 (2009)19]. Subsequently, they were soaked in the prepared SBFs. Stepwise surface characterization was assessed using Diffuse Reflectance Infra-red Fourier Transform Spectroscopy, DRIFTS. In parallel, the remnants of the soaking solutions were analyzed chemically by atomic absorption and biochemical kits, and physically by AC electrical conductivity measurements at room temperature. Scanning electron microscopy, SEM, was used to assess surface final morphology post the whole treatment duration. Incorporation of Sr +2and Zn +2 resulted in the growth of calcium deficient apatite of high carbonate content. The former increased the activity of biomimetic deposition while the latter induced more uniformity in the resultant coating.

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Section: Introductionmentioning

confidence: 99%

Comparative Study of Sr+2 and Zn+2 Incorporation in the Biomimetic Coating of a Prosthetic Alloy

Abdel-Fattah¹,

El-Sayed²,

Talaat³

et al. 2011

Open Biomat J

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“…[2][3][4] A lot of effort has been made in recent years to develop processing methods, such as plasma spraying, [5,6] electrophoretic methods, [7,8] and electrochemical methods, [9][10][11][12] for depositing calcium phosphate ceramics on the implant substrate alloys in order to have high strength, good processability, suitable specific density, and excellent corrosion resistance in the living body.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the electrochemical deposition of calcium phosphate bioceramic coatings has attracted considerable attention [9][10][11][12] because of its many advantages. Specifically, composition and coating structure controls are possible due to the relatively low processing temperature, and highly irregular objects can be coated relatively quickly.…”

Section: Introductionmentioning

confidence: 99%

“…[13] Since electrochemical deposition can be the result of increasing pH at the interface, which is attributed to electron incorporation to form OH -ions and H 2 through water reduction, H 2 gas evolution at the interface leads to a heterogeneous coating. [13] Recent work has used organic solutions to avoid the negative effects of H 2 gas, and more homogeneous coatings have been reported by Chen et al [14] In addition, Wang et al [11] pointed out that when calcium phosphate coatings are deposited on a Ti-6Al-4V substrate using an electrolytic method under 80 Torr, bubbles quickly lift from the cathode surface, making the deposit regular and integrated.…”

Section: Introductionmentioning

confidence: 99%

“…[15,16] Among these, HAP is the most interesting form of calcium phosphate, and has been electrochemically deposited from several solutions by a number of researchers. [9,11,[17][18][19][20] However, the effect of heat treatment on HAP formation on a Ti-6Al-4V substrate in a 0.04 M MCPM solution using an electrolytic process has not yet been discussed in detail.…”

Section: Introductionmentioning

confidence: 99%

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Phase Transformation of Calcium Phosphates by Electrodeposition and Heat Treatment

Shih

Wang

Chang

et al. 2010

Metall Mater Trans A

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The effect of heat treatment on the calcium phosphate deposited on Ti-6Al-4V substrate using an electrolytic process is investigated. The calcium phosphate was deposited in a 0.04 M Ca(H 2 PO 4 ) 2 AEH 2 O (MCPM) solution on a Ti-6Al-4V substrate at 333 K (60°C), 10 V, and 80 Torr for 1 hour, and calcined at various temperatures for 4 hours. The X-ray diffraction (XRD) results demonstrate that the phases are dicalcium phosphate (CaHPO 4 , DCPD) and hydroxyapatile [Ca(PO 4 ) 6 (OH) 2 , HAP] for the as-deposited samples. When the deposited sample was calcined at 873 K (600°C) for 4 hours, the XRD results show that the transformation of DCPD to HAP occurs. Moreover, HAP converts to b-TCP, CPP, and CaO. For the sample calcined at 1073 K (800°C) for 4 hours, the scanning electron microscopy (SEM) micrograph reveals that the crack of the calcined sample propagates with a width of about 3 lm. This result is due to HAP becoming decomposed and converting to b-TCP, CPP, CaO, and H 2 O. The vaporization of H 2 O within the calcined sample promotes the crack propagation and growth.

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Bioceramic Coatings for Medical Implants

Cabañas

2014

Bio‐Ceramics With Clinical Applications

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Morphology of calcium phosphate coatings deposited on a Ti–6Al–4V substrate by an electrolytic method under 80Torr

Cited by 49 publications

References 25 publications

Comparative Study of Sr+2 and Zn+2 Incorporation in the Biomimetic Coating of a Prosthetic Alloy

Comparative Study of Sr+2 and Zn+2 Incorporation in the Biomimetic Coating of a Prosthetic Alloy

Phase Transformation of Calcium Phosphates by Electrodeposition and Heat Treatment

Bioceramic Coatings for Medical Implants

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