Radiopaque intraluminal stents
A stent having a cobalt-based alloy, wherein the cobalt-based alloy is free of nickel (Ni), the cobalt-based alloy including 10-65 weight % metal member selected from a platinum group metal, a refractory metal, or combinations thereof, 15-25 weight % chromium (Cr), 4-7 weight % molybdenum (Mo), 0-18 weight % iron (Fe), and 22-40 weight % cobalt (Co).
1. A stent comprising:
a cobalt-based alloy, wherein the cobalt-based alloy is free of nickel (Ni), the cobalt-based alloy consisting of:
10-65 weight % metal member selected from, the group consisting of silver, gold, hafnium, niobium, rhenium, tantalum, zirconium, platinum, palladium, ruthenium, rhodium, osmium, iridium and combinations thereof;
15-25 weight % chromium (Cr);
4-7 weight % molybdenum (Mo);
0-18 weight % iron (Fe);
22-40 weight % cobalt (Co); and
0-2 weight % of manganese.
2. The stent of claim 1 , wherein the stent has a minimum ultimate tensile strength of 125 ksi.
3. The stent of claim 1 , wherein the stent has a minimum yield strength of 45 ksi.
4. The stent of claim 1 , wherein the stent has a minimum total elongation of 30%.
5. The stent of claim 1 , wherein the metal member is selected from the group consisting of silver, gold, hafnium, niobium, rhenium, tantalum, zirconium, and combinations thereof.
6. The stent of claim 1 , wherein the metal member is selected from the group consisting of platinum, palladium, ruthenium, rhodium, osmium, iridium, and combinations thereof.
7. A stent comprising:
a cobalt-based alloy, wherein the cobalt-based alloy is free of nickel (Ni), the cobalt-based alloy consisting of:
10-60 weight % metal member selected from the group consisting of silver, gold, hafnium, niobium, rhenium, tantalum, zirconium and combinations thereof;
10-25 weight % chromium (Cr);
18-55 weight % cobalt (Co);
0-3 weight % iron (Fe);
0-3 weight % manganese (Mn);
0-10 weight % molybdenum (Mo); and
optionally, one or more trace elements selected from the group consisting of beryllium, boron, carbon, phosphorus, silicon, sulfur, and titanium.
8. The stent of claim 7 , wherein the refractor-metal member is 10-45 weight %.
9. The stent of claim 7 , wherein the beryllium, the boron, or the carbon are in lower concentration than L-605 standard permits.
10. A stent comprising:
a cobalt-based alloy, wherein the cobalt-based alloy is free of nickel (Ni), the cobalt-based alloy consisting of:
10-65 weight % metal member selected from the group consisting of platinum, palladium, ruthenium, rhodium, osmium, iridium and combinations thereof;
10-25 weight % chromium (Cr);
18-50 weight % cobalt (Co);
10-about 15 weight % tungsten (W);
0-about 2 weight % manganese (Mn); and
0-about 3 weight % iron (Fe).
11. The stent of claim 10 , wherein the metal member comprises at least one of platinum, or palladium.
12. A stent comprising:
a cobalt-based alloy, wherein the cobalt-based alloy is free of nickel (Ni), the cobalt-based alloy comprising:
10-65 weight % metal member selected from the group consisting of silver, gold, hafnium, niobium, rhenium, tantalum, zirconium, platinum, palladium, ruthenium, rhodium, osmium, iridium, and combinations thereof;
15-25 weight % chromium (Cr);
4-7 weight % molybdenum (Mo);
0-18 weight % iron (Fe);
22-40 weight % cobalt (Co); and
0-2 weight % of manganese;
wherein the alloy has a single-phase microstructure.