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Variation in the Particle Size of Fe–Ti–B4C Powder Induced by High-Voltage Electrical Discharge

O.N.Sizonenko,
 
G.Bagliuk,
 
A.Raychenko,
 
É.I.Taftai,
 
E.V.Lipyan,
 
A.D.Zaichenko,
 
A.S.Torpakov,
 
E.V.Guseva
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2012, #03/04
http://www.materials.kiev.ua/article/1001

Abstract

The effect of high-voltage electrical discharge in a hydrocarbon liquid on the particle size of Fe–Ti–B4C powders is studied. It is shown that high-voltage ED in the suspension of Fe–Ti–B4C powders allows to significantly increase in their particle size. Important factors are the integral processing energy and pressure in the discharge channel. The relationship between the integral processing energy and decrease in the average diameter of micropowder particles is found. It is shown that there is a value of integral processing energy up to which the dependence of change in average particle sizes on the integral processing energy monotonically decreases. The use of high-voltage ED for dispersion of the micropowders allows significant reduction in time and energy necessary to achieve the desired particle size as compared with other methods.


DISPERGATION, DISPERSIVITY, HIGH-VOLTAGE ELECTRIC DISCHARGE, INTEGRAL ENERGY, POWDER, PRESSURE IN THE DISCHARGE CHANNEL, SPECIFIC SURFACE AREA

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