Improvement of bonding strength between biomimetic apatite coating and substrate
Improvement of bonding strength between biomimetic apatite coating and substrate
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DOI：
10.1002/jbm.b.30889
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发表时间：
2008-02-01
影响因子：
3.4
通讯作者：
Wei, Mei
中科院分区：
文献类型：
--
作者：
Qu, Haibo;Wei, Mei
在改良的模拟体液(m-SBF)中，采用仿生方法制备了类骨磷灰石涂层。研究了m-SBF用量对磷灰石涂层质量的影响。采用50、100、200mL三种m-SBF溶液将钛基片浸入密闭容器中，制得不同性能的磷灰石涂层，即I型、II型和III型磷灰石涂层。用X射线衍射仪和环境扫描电子显微镜对涂层进行了表征。通过结合强度测试评价了涂层与钛基材之间的结合情况。三种磷灰石涂层都表现出结晶不良的结构，形成的涂层表面形貌均匀。进一步增加m-SBF的体积，涂层表面开始形成细小的磷灰石颗粒。I、II、III型磷灰石涂层的结合强度分别为8.52+/-2.41、10.36+/-2.78和17.23+/-2.55 MPa。失效分析表明，III型涂层主要在涂层与基材的界面处失效，而I型和II型涂层主要在磷灰石涂层内失效。研究表明，通过控制m-SBF的用量，可以获得致密、厚实、附着力良好的磷灰石涂层。(C)2007年威利期刊公司。
Bone-like apatite coatings were prepared using a biomimetic method in a modified simulated body fluid (m-SBF). The effect of the m-SBF volume on the apatite coating quality was studied. Three m-SBF volumes, 50, 100, and 200 mL, were employed to immerse titanium substrates in a sealed container so as to produce apatite coatings with different properties, namely types I, type II, and type III apatite coatings, respectively. The coatings were characterized using X-ray diffraction and environmental scanning electron microscope. The bonding between the coating and the Ti substrate was evaluated using an adhesive strength test. All three apatite coatings demonstrated a poorly crystallized structure, and the coatings formed exhibited a uniformed surface morphology. Further increasing the m-SBF volume, small globules of apatite started to form on the surface of the coating. The bonding strength for the three coating systems were 8.52 +/- 2.41, 10.36 +/- 2.78, and 17.23 +/- 2.55 MPa for types I, II, and III apatite coatings, respectively. The failure analyses suggested that type III coating failed mostly at the interface between the coating and the substrate, while type I and II coatings failed mostly within the apatite coating. Our study revealed that a dense, thick, well-adhered apatite coating could be achieved by carefully controlling the volume of m-SBF. (C) 2007 Wiley Periodicals, Inc.