Heat-treated tantalum-alloy products, implantable medical devices incorporating same, and methods of processing tantalum-alloy products

摘要

The present disclosure is directed to tantalum-alloy products, implantable medical devices that incorporate tantalum-alloy products such as stents or other implantable medical devices, methods of making and/or processing the tantalum-alloy products and implantable medical devices, and methods of using the implantable medical devices. In an embodiment, a stent includes a stent body having a plurality of struts. At least a portion of the stent body is made from a tantalum alloy. The tantalum alloy includes a tantalum content of about 77 weight % (“wt %”) to about 92 wt %, a niobium content of about 7 wt % to about 13 wt %, and a tungsten content of about 1 wt % to about 10 wt %. The tantalum alloy exhibits at least one mechanical property modified by heat treatment thereof, such as yield strength, ultimate tensile strength, or ductility.

主权项

1. A stent, comprising:
a stent body including a plurality of struts, at least a portion of the stent body being made from a tantalum alloy including:
a tantalum content of 77 weight % (“wt %”) to 92 wt %;a niobium content of 7 wt % to 13 wt %;a tungsten content of 1 wt % to 10 wt %; andexhibiting at least one mechanical property modified by heat treatment thereof, the at least one mechanical property being at least one of grain microstructure, ductility, yield strength, or ultimate tensile strength,wherein the grain microstructure of the tantalum alloy exhibits an average grain size of 13μm to 16 μm in a transverse orientation.