Effect of gun current on the microstructure and crystallinity of plasma sprayed hydroxyapatite coatings

Morks, M.F.; Kobayashi, Akiko

doi:10.1016/j.apsusc.2007.02.183

Cited by 58 publications

(26 citation statements)

References 19 publications

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“…Absorption bands at 3440 cm -1 and 1640 cm -1 are characterised for stretching vibration of -OH. The presence of PO 4 3-group is observed at 1040 cm -1 ; 560 and 600 cm -1 . The FT-IR spectra of HAp/fCNTs nanocomposite present characteristic peaks of HAp and fCNTs.…”

Section: Resultsmentioning

confidence: 91%

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ELECTRODEPOSITION OF HYDROXYAPATITE/FUNCTIONALIZED CARBON NANOTUBES (HAp/fCNTs) COATINGS ON THE SURFACE OF 316L STAINLESS STEEL

Thơm

Năm

Phương

et al. 2017

JST

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Abstract. The coatings of hydroxyapatite/functionalized carbon nanotubes (HAp/fCNTs) were successfully synthesized on the surface of 316L stainless steel (316L SS) by electrodeposition. To improve the dispersion of CNTs into the electrolyte, CNTs were functionalized in the mixture of 67 % HNO 3 and 98 % H 2 SO 4 before electrodeposition coatings to form fCNTs. Different amounts of fCNTs were incorporated into the apatite coatings by adding fCNTs into the electrolyte solution. In this study, Fourier Transform Infrared Spectroscopy (FT-IR), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and mechanical techniques were used to analyze characteristics of HAp/fCNTs coatings. The results show that the HAp/fCNTs nanocomposite coatings contain single phase of HAp and CNTs with the coating thickness of 6.9 µm and the amount of fCNTs in the coatings is 6.95 %. With the presence of fCNTs in HAp coatings, the solubility of the coatings decreases in comparision with pure HAp coatings.

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Section: Resultsmentioning

confidence: 91%

“…Synthetic HAp has a similar chemical composition, crystal structure as the natural bone tissue [3,4]. It has bioactive and high biocompatibility with cells, tissues and can be create direct bonding with immature bone leading to the quick regeneration of bone.…”

Section: Introductionmentioning

confidence: 99%

ELECTRODEPOSITION OF HYDROXYAPATITE/FUNCTIONALIZED CARBON NANOTUBES (HAp/fCNTs) COATINGS ON THE SURFACE OF 316L STAINLESS STEEL

Thơm

Năm

Phương

et al. 2017

JST

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“…Hydroxyapatite (Ca 10 (PO 4 ) 6 (OH) 2 ,(HA) coating on metallic substrates is now becoming popular in clinically used applications due to excellent mechanical properties of substrate and good biological response of HA coating [1]. It is reported by the previous research that thermal spray techniques can develop thick, adherent and crystalline HA coatings as compared to other processes [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Role of Post Heat Treatment of Plasma Sprayed Pure and Al2O3-TiO2 Reinforced Hydroxyapatite Coating on the Microstructure and Mechanical Properties

Singh¹,

Singh²,

Prakash³

2010

JMMCE

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“…This results in severe powder decomposition and formation of a mixture of amorphous calcium phosphate (ACP), tricalcium phosphate (TCP), tetracalcium phosphate (TTCP), calcium oxide (CaO), and dehydroxylation products such as oxyhydroxyapatite (OHA) and oxyapatite (OA) . Crystallinity of APS HA coatings typically varies in the range of 65-80% ( Ref 13,14). Highly crystalline HA coatings (~92%) have been deposited using the MPS process (Ref 15), the lower thermal input of which enables the reduction of the overheating of powder particles and substrate.…”

Section: Introductionmentioning

confidence: 99%

Low-Energy Plasma Spray (LEPS) Deposition of Hydroxyapatite/Poly-ε-Caprolactone Biocomposite Coatings

et al. 2011

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Thermal spraying is widely employed to deposit hydroxyapatite (HA) and HA-based biocomposites on hip and dental implants. For thick HA coatings (>150 lm), problems are generally associated with the build-up of residual stresses and lack of control of coating crystallinity. HA/polymer composite coatings are especially interesting to improve the pure HA coatings' mechanical properties. For instance, the polymer may help in releasing the residual stresses in the thick HA coatings. In addition, the selection of a bioresorbable polymer may enhance the coatings' biological behavior. However, there are major challenges associated with spraying ceramic and polymeric materials together because of their very different thermal properties. In this study, pure HA and HA/poly-e-caprolactone (PCL) thick coatings were deposited without significant thermal degradation by low-energy plasma spraying (LEPS). PCL has never been processed by thermal spraying, and its processing is a major achievement of this study. The influence of selected process parameters on microstructure, composition, and mechanical properties of HA and HA/PCL coatings was studied using statistical design of experiments (DOE). The HA deposition rate was significantly increased by the addition of PCL. The average porosity of biocomposite coatings was slightly increased, while retaining or even improving in some cases their fracture toughness and microhardness. Surface roughness of biocomposites was enhanced compared with HA pure coatings. Cell culture experiments showed that murine osteoblast-like cells attach and proliferate well on HA/PCL biocomposite deposits.

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Effect of gun current on the microstructure and crystallinity of plasma sprayed hydroxyapatite coatings

Cited by 58 publications

References 19 publications

ELECTRODEPOSITION OF HYDROXYAPATITE/FUNCTIONALIZED CARBON NANOTUBES (HAp/fCNTs) COATINGS ON THE SURFACE OF 316L STAINLESS STEEL

ELECTRODEPOSITION OF HYDROXYAPATITE/FUNCTIONALIZED CARBON NANOTUBES (HAp/fCNTs) COATINGS ON THE SURFACE OF 316L STAINLESS STEEL

Role of Post Heat Treatment of Plasma Sprayed Pure and Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> Reinforced Hydroxyapatite Coating on the Microstructure and Mechanical Properties

Low-Energy Plasma Spray (LEPS) Deposition of Hydroxyapatite/Poly-ε-Caprolactone Biocomposite Coatings

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Effect of gun current on the microstructure and crystallinity of plasma sprayed hydroxyapatite coatings

Cited by 58 publications

References 19 publications

ELECTRODEPOSITION OF HYDROXYAPATITE/FUNCTIONALIZED CARBON NANOTUBES (HAp/fCNTs) COATINGS ON THE SURFACE OF 316L STAINLESS STEEL

ELECTRODEPOSITION OF HYDROXYAPATITE/FUNCTIONALIZED CARBON NANOTUBES (HAp/fCNTs) COATINGS ON THE SURFACE OF 316L STAINLESS STEEL

Role of Post Heat Treatment of Plasma Sprayed Pure and Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;-TiO&lt;sub&gt;2&lt;/sub&gt; Reinforced Hydroxyapatite Coating on the Microstructure and Mechanical Properties

Low-Energy Plasma Spray (LEPS) Deposition of Hydroxyapatite/Poly-ε-Caprolactone Biocomposite Coatings

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Role of Post Heat Treatment of Plasma Sprayed Pure and Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> Reinforced Hydroxyapatite Coating on the Microstructure and Mechanical Properties