POWDER COMPOSITE APK-1PK AND METHOD OF ITS PRODUCTION Russian patent published in 2014 - IPC C22C21/02 C22C1/04 B22F3/15 

FIELD: process engineering.

SUBSTANCE: invention relates to powder metallurgy, particularly to production of light materials with low linear expansion factor and can be used as a structural material in production of aircraft control system high-performance controllers. Proposed composition contains the following substances, in wt %: silicon - 41-45, nickel - 3.9-5.6, iron - ≤0.48, aluminium oxide ≤2.8, aluminium making the rest. Proposed process comprises silicon powder grinding to required dispersity, magnetic separation of silicon powder, mixing of the latter with powder of aluminium alloy "CAC1-50", filling of produced mix in capsule, vacuum degassing, gas-static compaction of capsules and removal of aluminium shell.

EFFECT: nontoxic material that features stable-size, low specific weight, good machinability, low linear expansion factor, low magnetic susceptibility.

2 cl, 1 tbl