Porous Ti-Nb with biofunctional coatings

(Poröses Ti-Nb mit biofunktionalen Beschichtungen)


Generation of porosity in metallic biomaterials causes significant stiffness reduction and supports bone tissue ingrowth. Porous bodies were made of beta-type Ti-40Nb powder by hot pressing and sintering with space holder material. The nanocrystalline alloy powder was produced by mechanical alloying or gas atomization. Samples with porosities of up to 60% with macropore sizes of 120-400 µm were produced which showed in compression tests Young‘s modulus values <1GPa. These porous bodies are developed as load-bearing substrates for bioresorbable materials and drug-delivery-systems.
Electrodeposition of hydroxyapatite coatings with different morphologies from a complex aqueous electrolyte is demonstrated.

 


K. Zhuravleva et al., Phase transformations in ball-milled Ti-40Nb and Ti-45Nb powders upon quenching from the β-phase region,
Powder Technol. 253 (2014) 166.

K. Zhuravleva et al., Porous low modulus Ti40Nb compacts with electrodeposited hydroxyapatite coating for biomedical applications,
Mater. Sci. Eng. C 33 (2013) 2280. K. Zhuravleva et al., Mechanical alloying of b-type Ti-Nb for biomedical applications, Adv. Eng. Mater. 15 (2013) 262.