کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1458899 | 989587 | 2016 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: La and F co-substituted hydroxyapatite bioactive coating reinforced by SiC nanowire/ZrO2 hybrid materials for carbon/carbon composites La and F co-substituted hydroxyapatite bioactive coating reinforced by SiC nanowire/ZrO2 hybrid materials for carbon/carbon composites](/preview/png/1458899.png)
La and F co-substituted hydroxyapatite (LFH) bioactive coatings reinforced by SiC nanowire/ZrO2 (SZ) hybrid materials were applied on carbon/carbon composites using a combination method of chemical vapor deposition, slurry process, electrochemical deposition and immersion process. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Raman spectroscope and X-ray photoelectron spectroscopy (XPS) were adopted to investigate the morphology, microstructure and composition of the coating. The adhesion strength of the coating was investigated by tensile test and the in-vitro bioactivity of the coating was studied using simulated body fluid (SBF) immersion test. The results showed that SZ hybrid reinforcement exhibited a porous and latticed structure, which favored the infiltration of LFH crystals and the integration between SZ and LFH. LFH showed a flake-like shape with a thickness of 20–60 nm and a length of 1–3 μm. The average adhesion strengths of unreinforced and SZ reinforced LFH coating were 2.97±0.32 MPa and 12.37±0.84 MPa, respectively. The in-vitro bioactivity test confirmed that the SZ reinforced LFH coating could induce the nucleation and growth of bone-like apatite on its surface in SBF. It was suggested that the SZ reinforced LFH coating might be an effective method to improve the surface bioactivity of carbon/carbon composites with excellent adhesion strength.
Journal: Ceramics International - Volume 42, Issue 2, Part A, 1 February 2016, Pages 2164–2169