Patent ID: 6740288
Filing Date: 2004-05-25
Classification: B22F,C22C

Abstract:
A process for preparing powdered tungsten-aluminum alloy, comprising the following steps:adding by weight powdered tungsten of a particle size less than 200 mesh and a purity greater than 99.8% and powdered aluminum of a particle size less than 200 mesh and a purity greater than 99.5% into a high-energy ball mill wherein the ratio of the powdered tungsten to the powdered aluminum is in an atom ratio of W:Al of 0.99 to 0.5, and the ratio by weight of ball/powdered tungsten and powdered aluminum is in the range of 10:1-50:1; milling the powdered tungsten and powdered aluminum for 4-10 hrs in the ball mill under an argon atmosphere for solid phase synthesis of the tungsten-aluminum alloy; adding stepwise an additional amount of powdered aluminum in increments during synthesis when the ratio of W:Al is 0.5 to obtain a tungsten-aluminum alloy W1-xAlx, wherein 0.5