a method is taught for rendering a boron - doped tri - nickel aluminide resistant to mechanical failure while at intermediate temperatures of 600 ° c . to 800 ° c . due to a hot - short phenomena . the method involves incorporating between 0 . 05 and 0 . 30 of cobalt in the composition according to the expression . sub . 100 - y b . sub . y . the concentration of aluminum , z , is between 0 . 23 and 0 . 25 and the concentration of boron , y , is between 0 . 2 and 1 . 50 atomic percent . the composition is formed into a melt and the melt is rapidly solidified by atomization and consolidated . the consolidation may be simultaneous with the rapid solidification , as in spray forming , or sequential by atomization to a powder and consolidation of the powder by hipping . the consolidated body is cold worked to increase the resistance of the body to failure at intermediate temperatures and may be annealed following the cold working .