Rev.Adv.Mater.Sci. (RAMS)
No 1, Vol. 28, 2011, pages 5-8

RAPID CONSOLIDATION OF A NANOCRYSTALLINE FeCrAlSi-Al2O3 COMPOSITES
BY PULSED CURRENT ACTIVARED SINTERING

Song-Lee Du, In-Yong Ko, Jung-Mann Doh, Jin-Kook Yoon, Sang-Whan Park and In-Jin Shon

Abstract

A high-density nanocrystalline 4.88Fe0.41Cr0.26Al0.25Si0.08 -Al2O3 composite was consolidated by a high-frequency, induction-heated sintering (HFIHS) within two minutes from mechanically activated powders of Fe2O3, Cr, Si, and Al powders. The advantage of this process is that it allows very quick densification to near theoretical density and prohibits grain growth in nano-structured materials. The average grain sizes and hardness were investigated.

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