METHOD OF MANUFACTURING ITEMS FROM POWDER Russian patent published in 1997 - IPC

FIELD: powder metallurgy. SUBSTANCE: invention focuses on ferroelectric material powders. Reduction in static pressure with maximum effect of ultrasonic vibrations is achieved by way of using a number of new approaches including simultaneous action of vibrations with at least two frequencies; imposing, to rigid elements, static pressure close in its value to half amplitude value of acoustic pressure from at least one of frequencies imposed to rigid elements; exciting radio pulse-type vibrations in one of rigid elements; and exciting, in some rigid elements, vibrations close in frequency to characteristic vibration frequencies of these elements. Versions of ultrasonic-compression methods proposed allow avoiding conventional static pressure-involving procedures. EFFECT: considerably increased key performance characteristics of material and material-based products. 4 cl, 3 dwg