Method for imparting strength and ductility to intermetallic...

Details Method for imparting strength and ductility to intermetallic... Method for imparting strength and ductility to intermetallic...

C - Chemistry, Metallurgy

22

C

75/115

C22C 19/03 (2006.01)

Patent

CA 1266389

METHOD FOR IMPARTING STRENGTH AND DUCTILITY TO INTERMETALLIC PHASES ABSTRACT OF THE DISCLOSURE A method for achieving both improved strength and improved ductility in intermediate phases is provided. The method, briefly stated, comprises the steps of providing a melt whose composition substantially corresponds to that of a preselected intermetallic phase having a crystal structure of the Ll2 type, such as nickel aluminide, modified with from about 0.01 to 2.5 atomic percent boron, and modified further with cobalt substituent metal and rapidly solidifying the melt at a cooling rate of at least about 103°C/second to form a solid body, the principal phase of which is of the Ll2 type crystal structure in either its ordered or disordered state.

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