Hierarchical surface patterning of Ni- and Be-free Ti- and Zr-based bulk metallic glasses by thermoplastic net-shaping.
In order to establish a strong cell-material interaction, the surface topography of the implant material plays an important role. This contribution aims to analyze the formation kinetics of nickel and beryllium-free Ti- and Zr-based Bulk Metallic Glasses (BMGs) with potential biomedical applications. The surface patterning of the BMGs is achieved by thermoplastic net-shaping (TPN) into anisotropically etched cavities of silicon chips. The forming kinetics of the BMG alloys is assessed by thermal and mechanical measurements to determine the most suitable processing temperature and time, and load applied. Array of pyramidal micropatterns with a tip resolution down to 50nm is achievable for the Zr-BMG, where the generated hierarchical features are crucial for surface functionalization, acting as topographic cues for cell attachment. The unique processability and intrinsic properties of this new class of amorphous alloys make them competitive with the conventional biomaterials.
IFW Dresden, Institute for Complex Materials, Helmholtzstrasse 20, D-01069 Dresden, Germany; Erich Schmid Institute of Materials Science, Austrian Academy of Sciences (ÖAW), Jahnstrasse 12, A-8700 Leoben, Austria. Electronic address: b.sarac@ifw-dresden.de.
Baran
B
Sarac
IFW Dresden, Institute for Complex Materials, Helmholtzstrasse 20, D-01069 Dresden, Germany.
Supriya
S
Bera
IFW Dresden, Institute for Complex Materials, Helmholtzstrasse 20, D-01069 Dresden, Germany; ETH Zurich, Department of Materials, Metal physics und Technology, Vladimir-Prelog-Weg 4, HCI J 492, 8093 Zürich, Switzerland.
Sascha
S
Balakin
IFW Dresden, Institute for Complex Materials, Helmholtzstrasse 20, D-01069 Dresden, Germany; Politehnica University of Timisoara, P-ta Victoriei 2, RO-300006 Timisoara, Romania; Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Winterbergstrasse 28, 01277, Dresden, Germany.
Mihai
M
Stoica
IFW Dresden, Institute for Complex Materials, Helmholtzstrasse 20, D-01069 Dresden, Germany. Electronic address: m.calin@ifw-dresden.de.
Mariana
M
Calin
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences (ÖAW), Jahnstrasse 12, A-8700 Leoben, Austria; Department Materials Physics, Montanuniversität Leoben, Jahnstrasse 12, A-8700 Leoben, Austria.
Jürgen
J
Eckert
D016880:Anisotropy; D001608:Beryllium / Q000737:chemistry; D002152:Calorimetry, Differential Scanning; D005898:Glass / Q000737:chemistry*; D008670:Metals / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D010084:Oxidation-Reduction; D010969:Plastics / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry; D013052:Spectrometry, X-Ray Emission; D013499:Surface Properties; D013696:Temperature; D014025:Titanium / Q000737:chemistry; D014961:X-Ray Diffraction; D015040:Zirconium / Q000737:chemistry
D008670:Metals; D010969:Plastics; D015040:Zirconium; D014025:Titanium; D001608:Beryllium; D012825:Silicon
Biomaterials; Bulk metallic glass; Hierarchical patterning; Thermoplastic net-shaping; Titanium; Zirconium