Metal alloys for medical devices
OwnerJoseph G. Furst, Udayan Patel +1inventors
InventorsJoseph G. Furst, Udayan Patel, Raymond W. Buckman
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Abstract
A medical device that is at least partially formed of a novel metal alloy, which novel metal alloy improves the physical properties of the medical device.
Claims59
A medical device that is at least partially formed of a metal alloy which improves the strength and ductility of the medical device, said metal alloy including at least about 90 weight percent of a solid solution or a rhenium and molybdenum alloy, said metal alloy including at least about 40 weight percent rhenium and at least about 40 weight percent molybdenum., said metal alloy having a controlled amount of nitrogen, oxygen and carbon so as to reduce micro-cracking in said metal alloy, a nitrogen content of said metal alloy less than a combined content of oxygen and carbon in said metal alloy, said metal alloy including an oxygen to nitrogen atomic ratio of at least about 1.2:1, said metal alloy including a carbon to nitrogen atomic ratio of at least about 2:1.
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A medical device that is at least partially formed of a metal alloy which improves the strength and ductility of the medical device, said metal alloy including at least about 90 weight percent of a solid solution or a rhenium and molybdenum alloy, said metal alloy including about 40-50 weight percent rhenium and about 50-60 weight percent molybdenum, said metal alloy having a controlled amount of nitrogen, oxygen and carbon so as to reduce micro-cracking in said metal alloy, said metal alloy having a nitrogen content of less than about 0.001 weight percent, said metal alloy having a carbon content of less than about 0.2 weight percent, having an oxygen content of less than about 0.1 weight percent, said metal alloy including an oxygen to carbon atomic ratio of about 0.2:1 and up to about 50:1, said metal alloy including an oxygen to nitrogen atomic ratio of at least about 1.2:1 and up to about 100:1, said metal alloy including a carbon to nitrogen atomic ratio of at least about 2:1 and up to about 100:1.
A medical device that is at least partially formed of a metal alloy which improves the strength and ductility of the medical device, said metal alloy including at least about 98 weight percent of a solid solution or a rhenium and molybdenum alloy, said metal alloy including about 45-50 weight percent rhenium and about 50-55 weight percent molybdenum, said metal alloy having a controlled amount of nitrogen, oxygen and carbon so as to reduce micro-cracking in said metal alloy, said metal alloy having a nitrogen content of less than about 0.001 weight percent, said metal alloy having a carbon content of less than about 0.2 weight percent, having an oxygen content of less than about 0.1 weight percent, said metal alloy including an oxygen to carbon atomic ratio of about 0.2:1 and up to about 50:1, said metal alloy including an oxygen to nitrogen atomic ratio of at least about 1.2:1 and up to about 100:1, said metal alloy including a carbon to nitrogen atomic ratio of at least about 2:1 and up to about 100:1, said metal alloy having an average yield strength of at least about 70 ksi and an average ultimate tensile strength of at least about 60 ksi, said metal alloy having an average grain size is about 5.2-10 ASTM, said metal alloy having an average tensile elongation of at least about 25%, said metal alloy having an average hardness of at least about 60 (HRC) at 77° F., and said metal alloy having an average density of at least about 13.4 gm/cc.
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