Mechanical Properties of Surface Nanostructured Titanium Alloys and Their Osteoblastic Response
In this work we investigated the surface characteristics,mechanical properties and in vitro cytocompatibility of a titanium alloy with a hierarchical textured surface,consisting of nanograins and micro-roughness. The unique hierarchical texturing was produced by surface mechanical attrition treatment (SMAT). The surface characteristics were evaluated by scanning electron microscopy,X-ray diffraction,transmission electron microscopy, contact angle and surface energy measurements. Mechanical properties were evaluated in terms of tensile and fatigue tests. The in vitro cytocompatibility of the SMAT processed surfaces were assessed in terms of cellular attachment,morphology,viability,and alkaline phosphatase (ALP) activity. It is shown that yield strength was significantly improved while the fatigue limit was remarkably reduced. Nevertheless the in vitro study shows enhanced cellular functions observed on the SMAT processed substrate. This study suggests that the SMAT process may provide a novel method of surface modification to the currently available metallic biomaterials.
Titanium implants mechanical properties in vitro cytocompatibility osteoblastic behavior surface mechanical attrition treatment
Peng Cao Changli Zhao Xiaonong Zhang
Department of Chemical and Materials Engineering,The University of Auckland,Private Bag 92019,Auckla School of Materials Science and Engineering,Shanghai Jiato Tong University,Shanghai,China
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
2027-2031
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）