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|標題:||Characterization of electrolytic HA/ZrO2 double layers coatings on Ti-6Al-4V implant alloy||作者:||Yen, S.K.
|關鍵字:||electrolytic deposition;HA/ZrO2 double layer coating;Ti-6Al-4V alloy;cell culture;total hip-arthroplasty;316l stainless-steel;simulated body-fluid;bioceramic coatings;calcium-phosphate;pure titanium;deposition;prosthesis;oxidation;metal||Project:||Materials Science & Engineering C-Biomimetic and Supramolecular Systems||期刊/報告no：:||Materials Science & Engineering C-Biomimetic and Supramolecular Systems, Volume 26, Issue 1, Page(s) 65-77.||摘要:||
Hydroxyapatite (HA) coating was proved having bioactive property and hence improving the bonding strength on bone tissue without inducing the growth of fiber tissue. However, the weak adhesion between HA and metal implants is still the major problem. In this study, a novel method of electrolytic HA/ZrO2 double layers coating was successfully conducted on F-136 Ti-6Al-4V implant alloy in ZrO2(NO3)(2) aqueous solution and subsequently in the mixed solution of Ca(NO3)(2) and NE4H2PO4. After annealing at 400 degrees C, 500 degrees C and 600 degrees C for 4 h in air, the coated specimens were evaluated by X-ray diffraction analyses, surface morphology observations, scratch tests, dynamic polarization tests, immersion tests and cell culture assays. In addition to corrosion resistance, the adhesion strength of electrolytic deposited HA on Ti alloy was dramatically improved from the critical scratch load 2 N to 32 N by adding the intermediate electrolytic deposition of ZrO2, which showed the strong bonding effects between Ti alloy substrate and HA coating. Based on the cell morphology and cell proliferation data, HA/ZrO2 double layers coating revealed the better substrate for the adhesion and proliferation of osteoblasts than the others. It was also found that the crystallization of HA had positive effect on the proliferation of osteoblasts. (c) 2005 Elsevier B.V. All rights reserved.
|Appears in Collections:||材料科學與工程學系|
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