Carbon foam/hydroxyapatite coating for carbon/carbon composites: Microstructure and biocompatibility

Carbon/carbon composites, when used as bone implant materials, do not adhere well to the bone tissues because of their non-bioactive characteristics. Therefore, we electro-deposited SiC-hydroxyapatite coatings (with an ultrasound-assisted step) on carbon/carbon composites. We analyzed how the content and size of the SiC particles affected the structure, morphology, bonding strength and dissolution of the SiC-hydroxyapatite coatings. The hydroxyapatite coating dissolution properties were assessed by the released Ca2+ and the weight loss. The SiC-hydroxyapatite coating on naked carbon/carbon composites showed a more compact microstructure in comparison to the hydroxyapatite coating on carbon/carbon composites. The reasons for the changes in the microstructure and the improvement in the adhesion of the coatings on C/C were discussed. Moreover, the addition of SiC particles increased the binding strengths of the hydroxyapatite coating on C/C composite, as well as reduced the dissolution rate of the hydroxyapatite coating.

Download Full-text

Preparation of hydroxyapatite coating using chemical liquid vaporization deposition on carbon/carbon composites

RSC Advances ◽

10.1039/c4ra05664g ◽

2014 ◽

Vol 4 (77) ◽

pp. 41129-41134 ◽

Cited By ~ 7

Author(s):

Ni Xin-Ye ◽

Chu Cen-Cen ◽

Xiong Xin-Bo ◽

Li Ai-Jun ◽

Bai Rui-Cheng

Keyword(s):

Hydroxyapatite Coating ◽

Carbon Composites

Download Full-text

Preparation and properties of in-situ growth of carbon nanotubes reinforced hydroxyapatite coating for carbon/carbon composites

Materials Science and Engineering C ◽

10.1016/j.msec.2016.09.060 ◽

2017 ◽

Vol 70 ◽

pp. 805-811 ◽

Cited By ~ 21

Author(s):

Shoujie Liu ◽

Hejun Li ◽

Yangyang Su ◽

Qian Guo ◽

Leilei Zhang

Keyword(s):

Carbon Nanotubes ◽

Hydroxyapatite Coating ◽

Carbon Composites ◽

In Situ Growth

Download Full-text

SURFACE HYDROPHILIC MODIFICATION FOR CARBON/CARBON COMPOSITES AND ITS EFFECT ON THE BONDING STRENGTH OF HYDROXYAPATITE COATING

Surface Review and Letters ◽

10.1142/s0218625x14500164 ◽

2014 ◽

Vol 21 (01) ◽

pp. 1450016 ◽

Cited By ~ 3

Author(s):

LEILEI ZHANG ◽

HEJUN LI ◽

QIANG SONG ◽

KEZHI LI ◽

JINHUA LU ◽

...

Keyword(s):

Bonding Strength ◽

Deposition Process ◽

Hydroxyapatite Coating ◽

Cooh Group ◽

Carbon Composites ◽

Water Contact ◽

Hydrophilic Modification ◽

Electrochemical Deposition Method ◽

Initial Deposition ◽

Hydroxyapatite Crystals

In order to improve the bonding strength of hydroxyapatite coating on carbon/carbon composites, a surface hydrophilic modification was performed on carbon/carbon composites using a combination of H 2 O 2 and FeSO 4 ⋅ 7 H 2 O under ultraviolet irradiation. The hydroxyapatite coating was prepared by an ultrasound-assisted electrochemical deposition method. The results showed that the surface hydrophilic modification introduced a large number of oxygen-containing functional groups ( C = O , C – O and COOH group) onto the surface of carbon/carbon composites. The surface hydrophily of the modified carbon/carbon composites was significantly improved with the water contact angle decreasing from 85.7 ± 4.1° to 11.9 ± 1.5°. The modified carbon/carbon composites had strong induction ability for the deposition of hydroxyapatite crystals. The hydroxyapatite showed a wavy-shaped crystal at initial deposition process and subsequently formed a compact and uniform coating. The bonding strength of hydroxyapatite coating on modified carbon/carbon composites (9.58 ± 0.40 MPa) was significantly higher than that of the coating on unmodified carbon/carbon composites (3.04 ± 0.20 MPa).

Download Full-text