Low‐Temperature Processing of Dense Hydroxyapatite–Zirconia Composites

Nayak, Yougojoti; Rana, Raghunath P.; Pratihar, Swadesh K.; Bhattacharyya, Santanu

doi:10.1111/j.1744-7402.2008.02180.x

Cited by 21 publications

(10 citation statements)

References 20 publications

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“…respectively[52][53][54][55]. The peak located at 560 and 1027 cm −1 , which is the characteristic PO4 3− band confirms the presence of HA in the coating layer.…”

supporting

confidence: 65%

Direct fabrication of crystalline hydroxyapatite coating on zirconium by single-step plasma electrolytic oxidation process

Cengiz

Uzunoğlu

Stanciu

et al. 2016

Surface and Coatings Technology

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“…respectively[52][53][54][55]. The peak located at 560 and 1027 cm −1 , which is the characteristic PO4 3− band confirms the presence of HA in the coating layer.…”

supporting

confidence: 65%

Direct fabrication of crystalline hydroxyapatite coating on zirconium by single-step plasma electrolytic oxidation process

Cengiz

Uzunoğlu

Stanciu

et al. 2016

Surface and Coatings Technology

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“…There are several events that take place within a ceramic during phase transformation. Previous research has shown the change in ZrO 2 phases by introducing heat treatment such as sintering and annealing at temperatures up to 1500 • C. Sintering at temperatures up to 1500 • C would result in an increase in hardness and toughness as found by Miao et al [37], and Nayak et al [38]. Changes in volume, strength, and the grain boundaries depending on the concentration of the additive and the critical temperature applied were also reported by Sato et al [39] as well as decreasing the grain size of the ZrO 2 reduces the amount of T to M phase transformation.…”

Section: Introductionmentioning

confidence: 93%

Mathematical modelling of the fibre laser surface processing of a zirconia engineering ceramic by means of three-dimensional finite-element analysis

Shukla

Lawrence

2011

Proceedings of the Institution of Mechanical Engineers, Part C:

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DOI: 10.1243/09544062JMES2434Abstract: The thermal effects of fibre laser surface treatment on a ZrO 2 engineering ceramic were studied using a computational finite-element model (FEM). Temperature increases on the surface and the bulk of the ZrO 2 during the fibre laser processing were measured using an infra-red thermometer and specifically located thermocouples. The results showed an error of 5 per cent with the surface and 18 per cent within the bulk of the ZrO 2 when comparing the experimental readings with those of the FEM. The FEM revealed a relationship between the traverse speed, power density, time, depth, and the temperature during various stages of the fibre laser surface treatment of the ZrO 2 . By utilizing data obtained from a thermogravimetry-differential scanning calorimetry (TG-DSC), the FEM predictions of the temperature distribution were used to map phase transformations and significant events occurring during the fibre laser surface treatment of the ZrO 2 . The mapping revealed that the fibre laser surface treatment generally resulted in a phase transformation of the ZrO 2 at various temperatures changes as further shown in the article.

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“…The absorption band peak at 2140-2165 cm − 1 verify to the existence of c-ZrO 2 45 . The stretching vibration, libration-deformation, stretching vibration and stretching vibration band peaks at 560-570, 645-655, 2340-2380 and 3730-3750 cm − 1 verify to the existence of apatite [45][46][47][48][49] . However, crystalline apatite was not observed on the MAO surfaces by XRD as seen in Fig.…”

Section: Resultsmentioning

confidence: 75%

In Vitro Biological and Antimicrobial Properties of Chitosan-based Bioceramic Coatings on Zirconium

Aktuğ

Durdu

Kalkan

et al. 2021

Preprint

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Ca-based porous and rough bioceramic surfaces were coated on zirconium by micro arc oxidation (MAO). Subsequently, an antibacterial chitosan layer was covered on the MAO-coated zirconium surfaces by dip coating method to develop an antibacterial, bioactive and biocompatible composite biopolymer and bioceramic layer for implant applications. The cubic-ZrO2, meta-stable Ca0.15Zr0.85O1.85, and Ca3(PO4)2 were detected on the MAO surface by powder-XRD. The existence of chitosan on the MAO-coated Zr surfaces was verified by FTIR. The micro-pores and thermal cracks on the bioceramic MAO surface were sealed by chitosan coating, while the MAO surface is porous and rough. All elements such as Zr, O, Ca, P and C were homogenously distributed through both surfaces. Moreover, both surfaces indicated hydrophobic properties. However, the contact angle value of the MAO surface was lower than the one of chitosan-based MAO surface. In vitro bioactivity on both surfaces was investigated by XRD, SEM and EDX analyses at post-immersion in simulated body fluid (SBF) up to 14 days. In vitro bioactivity was significantly enhanced on the chitosan-based MAO surface with respect to the MAO surface. In vitro bacterial adhesions on the chitosan-based MAO surfaces were lower compared to the MAO surfaces for Staphylococcus aureus and Escherichia coli.

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Low‐Temperature Processing of Dense Hydroxyapatite–Zirconia Composites

Cited by 21 publications

References 20 publications

Direct fabrication of crystalline hydroxyapatite coating on zirconium by single-step plasma electrolytic oxidation process

Direct fabrication of crystalline hydroxyapatite coating on zirconium by single-step plasma electrolytic oxidation process

Mathematical modelling of the fibre laser surface processing of a zirconia engineering ceramic by means of three-dimensional finite-element analysis

In Vitro Biological and Antimicrobial Properties of Chitosan-based Bioceramic Coatings on Zirconium

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