title: Low Young's modulus Ti-based porous bulk glassy alloy without cytotoxic elements.
abstract: A new a biocompatible Ti42Zr40Ta3Si15 (atomic %) porous bulk glassy alloy was produced by combination of rapid solidification and powder metallurgy techniques. Amorphous alloy ribbons were fabricated by melt spinning, i.e. extremely fast quenching the molten alloy with 10(6)K/s from T=1973K down to room temperature. The ribbons were then cryo-milled at liquid nitrogen temperature in order to produce powder, which was subsequently hot pressed. The resulting thick pellets have a porosity of about 14vol%, a high compression strength of 337MPa and a Young's modulus of about E=52GPa, values very close to those characteristic of cortical bone. Moreover, the morphology of the samples is very similar to that of cortical bone. The biocompatibility, which is due to the absence of any toxic element in the chemical composition, together with the suitable mechanical behavior, make these samples promising for orthopedic and dentistry applications.
  
  
  
  Ti-based alloys are nowadays the standard solution for biomedical implants. However, both the conventional crystalline and amorphous alloys have higher rigidity as the human bone, leading to the damage of the bone at the interface, and contains harmful elements like vanadium, aluminum, nickel or beryllium. The hierarchical porous structures based on glassy alloys with biocompatible elements is a much better alternative. This work presents for the first time the manufacturing of such porous bodies starting from Ti-based amorphous alloy ribbons, which contains only non-harmful elements. The morphology and the compressive mechanical properties of these new products are analyzed in regard with those characteristic to the cortical bone.
authors.affiliation: Politehnica University Timisoara, P-ta Victoriei 2, 300006 Timisoara, Romania.
authors.forename: M
authors.initials: M
authors.lastname: Nicoara
authors.affiliation: Politehnica University Timisoara, P-ta Victoriei 2, 300006 Timisoara, Romania.
authors.forename: A
authors.initials: A
authors.lastname: Raduta
authors.affiliation: IFW Dresden, Institute for Complex Materials, Helmholtzstr. 20, 01069 Dresden, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Parthiban
authors.affiliation: Politehnica University Timisoara, P-ta Victoriei 2, 300006 Timisoara, Romania.
authors.forename: C
authors.initials: C
authors.lastname: Locovei
authors.affiliation: IFW Dresden, Institute for Complex Materials, Helmholtzstr. 20, 01069 Dresden, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Eckert
authors.affiliation: Politehnica University Timisoara, P-ta Victoriei 2, 300006 Timisoara, Romania; IFW Dresden, Institute for Complex Materials, Helmholtzstr. 20, 01069 Dresden, Germany. Electronic address: m.stoica@ifw-dresden.de.
authors.forename: M
authors.initials: M
authors.lastname: Stoica
mesh_terms: D000497:Alloys / Q000737:chemistry*; D055119:Elastic Modulus; D005898:Glass / Q000737:chemistry*; D006801:Humans; D016062:Porosity; D014025:Titanium / Q000737:chemistry*
chemical_list: D000497:Alloys; D014025:Titanium
keywords: Biocompatibility; Bulk glassy alloy; Mechanical properties; Porous Ti-based alloy