ALUMINUM-BASED POWDER COMPOSITE MIXTURE AND METHOD OF PRODUCTION OF SUCH MIXTURE Russian patent published in 2006 - IPC C22C21/02 C22C1/05 

FIELD: powder metallurgy; structural materials for precision mechanical engineering; production of command devices for flying vehicle control systems.

SUBSTANCE: proposed aluminum-based powder composite mixture contains the following components, mass-%: silicon, 41-43; nickel, 4.1-5.2; phosphorus, 0.05-0.1; aluminum nitride, 0.01-0.05; the remainder being aluminum. Method proposed for production of such mixture includes preparation of melt containing aluminum, silicon and nickel, spraying of melt for obtaining powder and mixing of this powder with silicon powder; melt containing additionally phosphorus is also prepared at subsequent introduction of nitrogen; spraying of melt is performed by means of nitrogen at temperature and pressure ensuring forming of aluminum nitride. As a result, finely-dispersed homogeneous structure is obtained at technological plasticity ensuring satisfactory deformation treatment of material at linear expansion coefficient, vacuum tightness and dimensional stability at beryllium level.

EFFECT: enhanced operational reliability of articles at increased service life.

3 cl, 2 tbl, 1 ex