Publication detail

Synthesis and characterization on atomphospheric plasma sprayed amorphous silica doped hydrxoyapatite coatings

XU, J. JOGUET, D. ČÍŽEK, J. KHOR, K. LIAO, H. CODDET, C. CHEN, W.

Original Title

Synthesis and characterization on atomphospheric plasma sprayed amorphous silica doped hydrxoyapatite coatings

Type

journal article - other

Language

English

Original Abstract

Plasma sprayed hydroxyapatite (HA) coatings have been widely investigated for application on surface of biomedical metals to improve bonding and interaction between body tissues and implant. In this study, a small amount of amorphous silicon dioxide (silica,~1, 2, 5 wt.%) was introduced into HA slurry which was subsequently spray-dried into powder form. The powder feedstock was then sprayed onto Ti-6Al-4V alloy substrates by an atmospheric plasma spraying technology. To improve the bonding strength of as-sprayed coatings, the substrates were pre-heat treated to 250'C by plasma. The characteristics of the as sprayed coatings were investigated by various technologies inclusive of scanning electron microscopy (SEM), X-ray diffraction and X-ray photoelectron spectrometry, and Raman spectrometry. The adhesive bonding strength of the as-sprayed coatings was specified using a universal testing system. Modulus and hardness of the coatings were investigated using nano-hardness tester. The results showed that, with pre- substrate heat treatment, the presence silica have enhanced the hardness, modulus and adhesive strength of coatings. Incorporation of Si has affected the structure of HA crystal involving the exchange of oxygen and silicon. In addition, in vitro osteoblasts cellular responses were assessed and discussed to investigate the cell proliferation and differentiation on the as sprayed coatings.

Keywords

Hydroxyapatite; Silica; Atmospheric plasma spraying; Coatings;Osteoblasts

Authors

XU, J.; JOGUET, D.; ČÍŽEK, J.; KHOR, K.; LIAO, H.; CODDET, C.; CHEN, W.

RIV year

2012

Released

25. 6. 2012

Publisher

Elsevier

ISBN

0257-8972

Periodical

Surface and Coatings Technology

Year of study

206

Number

22

State

Swiss Confederation

Pages from

4659

Pages to

4665

Pages count

7

URL

http://www.sciencedirect.com/science/article/pii/S0257897212004410

Full text in the Digital Library

http://hdl.handle.net/11012/31001

BibTex

@article{BUT96783,
  author="Jinling {Xu} and David {Joguet} and Jan {Čížek} and Khiam Aik {Khor} and Han Lin {Liao} and Christian {Coddet} and Wei Ning {Chen}",
  title="Synthesis and characterization on atomphospheric plasma sprayed amorphous silica doped hydrxoyapatite coatings",
  journal="Surface and Coatings Technology",
  year="2012",
  volume="206",
  number="22",
  pages="4659--4665",
  issn="0257-8972",
  url="http://www.sciencedirect.com/science/article/pii/S0257897212004410"
}