Patent ID: 7819988
Filing Date: 2010-10-26
Classification: C22C,H01F

Abstract:
1. A method of making cobalt-platinum alloys, comprising: a. providing a sample of cobalt-platinum alloy; b. annealing said sample; c. placing said annealed sample in an inert atmosphere; d. placing said annealed sample in said inert atmosphere in a furnace; e. raising the temperature of said furnace from room temperature to about 960 degrees Celsius at a ramp rate of about 15 degrees Celsius per minute; f. raising the temperature of said furnace from about 960 degrees Celsius to about 1000 degrees Celsius at a ramp rate of about 4 degrees Celsius per minute; g. maintaining said sample within said furnace within said inert atmosphere at a temperature of about 1000 degrees Celsius for a period of about 3 hours; h. cooling said sample within said furnace within said inert atmosphere from a temperature of about 1000 degrees to a temperature of about 600 degrees Celsius at a cooling rate of between about 120 and about 150 degrees Celsius per minute; i. holding said sample within said furnace within said inert atmosphere at a temperature of about 600 degrees Celsius for a period of about 10 hours; and j. quenching said sample in a suitable quenching oil to substantially reduce the temperature of said sample.