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  • 《Materials Science and Engineering: C》
    年:2017   卷:78   期数:   ISSN:0928-4931   点击量:362
    Title:    Innovative surface modification of Ti6Al4V alloy by electron beam technique for biomedical application
    文章编号:    20170008
    Author(s):     Claudia Ramskogler, Fernando Warchomicka, Sepideh Mostofi, Annelie Weinberg, Christof Sommitsch
    Keywords:    Titanium alloy; Electron beam structuring; Surface roughness; Osteoblastic behaviour; Surface hardening
    Abstract:     The low elastic modulus, high corrosion resistance and excellent biological response allow titanium alloys to be used for permanent orthopaedic devices. Furthermore, the design of specific multi scale surface topographies on titanium alloys can provide a fast osseointegration. This work highlights the use of electron beam as a promising technique to produce a designed surface topography and improve the tribological behaviour of Ti6Al4V alloy. The produced surface topography due to the transport of molten material is influenced by the deflection figure, the physical properties of the material and the energy input. The analysis of the surface roughness shows an increment of the area up to 26% and a canal shape in a range from 1.3 μm up to 9 μm depth and from 68.6 μm up to 119.7 μm width. The high solidification rate reached during the process affects the microstructure, provoking the formation of martensite and thus the improvement of hardness. In vitro studies with pre-osteoblastic MC3T3-E1 cells performed for several cultivation times show the cells with a polygonal shape and built connections through elongated filopodia. A notable increase of cell spreading area on surface structure with a finer canal shape is found after 48 h cultivation time.
    页码:     105-113
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