Stent device for spinal fusion

A bone implant used to repair a spinal column, said bone implant at least partially formed of a metal alloy, said metal alloy including at least about 90 wt. % of a solid solution or a rhenium and molybdenum alloy, said metal alloy including at least about 40 wt. % rhenium and at least about 40 wt. % 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, said metal alloy including an outer layer formed by a gas nitriding process, a salt-bath nitriding process, or a plasma nitriding process, wherein said nitride surface layer results in enhanced wear resistance properties to said rhenium and molybdenum alloy as compared to a similar rhenium and molybdenum alloy absent said nitride surface layer.