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Effect of minor nano-Fe powder additions on sintering temperature of Fe-base powder

Hua Wei Wu

Abstract

The tested samples prepared by adding 0.5% nano-Fe powder to coarse Fe-based powder,and ball-milling the mixed powder violently were sintered respectively at 600,650,700,750,800,850 and 920 ℃ for 20 min.The morphology of the tested samples was observed by TEM and SEM.The results show that the sintering temperature of the samples decrease 260 ℃ with the addition of nano-Fe powder,which is due to that nano-Fe powder with high activity and low melting point adsorbs,dissolves and diffuses rapidly at the interface of coarse Fe-base powder particle.

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Key concepts: Materials science, Sintering, Ball mill, Nano-, Base (topology), Metallurgy, Powder mixture, Melting temperature