| 摘要 |
FIELD: powder metallurgy. ^ SUBSTANCE: parts of devices protecting against radioactive emission or electric contacts are proposed to be manufactured from tungsten/copper pseudoalloy. Tungsten powder is mixed with binder containing 0.5-1.5% colophony and 0.05-0.15% ammonium formate or citrate. Resulting mixture is compacted and resulting porous blanc is brought into contact with copper. The total is thermally treated by gradually raising temperature: first in vacuum to remove binder and to melt copper and then in argon atmosphere to 1360-1410. ^ EFFECT: increased wettability and uniformity of impregnation, and eliminated explosive risk due to excluded use of hydrogen. ^ 3 cl, 1 tbl, 10 ex |
