FIELD: process engineering.
SUBSTANCE: invention relates to powder metallurgy and may be used for production of fine passivated powders of metals or alloys. Powder with mean particle size smaller than 10 mcm consists of one of reactive metals: zirconium, titanium or hafnium or contains one of said metals. It is produced by metallothermic reduction of the oxides of said metals or halides by reducing metal to be retarded by adding of passivation gas or gas mix in and/or after reduction of oxides or halides and/or by adding of passivation solid substance before reduction of oxides or halides. Note here that reduction and passivation are performed in one evacuated and gastight reaction pot.
EFFECT: ruled out spontaneous ignition of reactive powders of metals or oxides owing to retardation.
22 cl, 5 dwg, 4 ex
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