Low modulus biocompatible titanium base alloys for medical devic

Details Low modulus biocompatible titanium base alloys for medical devic Low modulus biocompatible titanium base alloys for medical devic

1997-01-31

1999-02-16

Sheehan, John

Metal treatment

Stock

Titanium, zirconium, or hafnium base

420417, C22C 1400

Patent

active

058715959

ABSTRACT:
Biocompatible titanium base alloys for medical devices which are intended to remain on or in a living human being for an extended period of time, such as surgical and medical implants. The alloys are free from toxic elements such as Al, Ni, Co, Fe, Cr, Mo, and W. They are quaternary alloys of Ti with between about 2.5% up to 13% Zr, about 20% to about 40% Nb, about 4.5% to about 25% Ta, all percentages being by weight, the balance being Ti and the total of Ta plus Nb being between about 35% and 52% by weight. The ration of Nb/Ta is between 2 and 13. These alloys may also contain limited amounts of non-toxic interstitial elements, such as C, N, and O. The relative proportions of Ti, Zr, Ta, and Nb are such that the modulus of elasticity is below 65 GPa.

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